This document provides an overview of plant systematics and various systems of plant classification. It discusses Linnaeus' artificial system based on stamen characteristics. Natural systems like de Jussieu and Bentham & Hooker group plants to reflect evolutionary relationships. Phylogenetic systems aim to reconstruct evolutionary history using various plant data. Key figures discussed include Linnaeus, de Jussieu, Brown, de Candolle, and Adanson, and their contributions to developing natural and phylogenetic classification systems. The document also covers taxonomic hierarchy concepts including genus, species, and species concepts.
This document discusses the history and principles of the International Code of Botanical Nomenclature (ICBN). It outlines that Linnaeus first introduced binomial nomenclature for naming plants in 1753. Over subsequent meetings and codes from 1892 to 1983, the rules of botanical nomenclature were further developed. The current ICBN from 1983 in Sydney, Australia consists of 6 principles, 75 rules, and 57 recommendations for systematically naming taxonomic plant groups according to priority and Latin conventions.
This document summarizes several systems of plant classification including artificial, natural, and phylogenetic systems. It provides details on Linnaeus' artificial classification system based on plant sexuality and number of sexual parts. It also describes Bentham and Hooker's widely adopted natural system from 1862-1883, and Engler and Prantl's phylogenetic system from 1887-1915 which was based on evolutionary relationships and classified plants into 13 divisions.
The document discusses the history and evolution of taxonomic plant classification systems from ancient to modern times. It describes early artificial systems from 2000 BC based on single characteristics like use or appearance. Natural systems from the 1600s classified plants based on multiple natural characteristics. Phylogenetic systems from the 1800s classify plants based on evolutionary relationships revealed by modern techniques. The most widely accepted current systems combine natural and phylogenetic approaches.
The document defines and describes various parts of flowers including the pedicel, sepal, petal, perianth, calyx, corolla, androecium, gynoecium, as well as flower symmetry and types. It also discusses inflorescence structures such as spikes, racemes, umbels, heads, corymbs and spikelets. Different inflorescence examples like daisies, proteas, hawthorns and grasses are provided. The document provides morphological terminology for comprehensive description and identification of floral structures.
Rolf Dahlgren was a Danish botanist who published an influential plant classification system in 1975. He used a two-dimensional graphic system called a Dahlgrenogram to display phylogenetic relationships among plant groups. Dahlgren's system was based primarily on morphological and chemical characteristics and divided angiosperms into 31 superorders within two subclasses. While comprehensive, it considered only flowering plants and did not classify below the family level. Subsequent molecular studies have revised placements of some families from Dahlgren's system.
The International Code of Botanical Nomenclature (ICBN) governs the formal scientific names used for plants. Some key points:
- Carl Linnaeus is considered the father of modern taxonomy and introduced the system of scientific naming for species in 1753.
- Names are determined by nomenclature types and are based on priority of publication. Each taxonomic group can have only one correct scientific name.
- Names are revised in subsequent International Botanical Congresses starting in 1892 to establish standards for effective/valid publication, author citation, typification, and rejection of illegitimate names.
- Related codes also exist for zoological nomenclature, cultivated plants, bacteria,
This document discusses the history and principles of the International Code of Botanical Nomenclature (ICBN). It outlines that Linnaeus first introduced binomial nomenclature for naming plants in 1753. Over subsequent meetings and codes from 1892 to 1983, the rules of botanical nomenclature were further developed. The current ICBN from 1983 in Sydney, Australia consists of 6 principles, 75 rules, and 57 recommendations for systematically naming taxonomic plant groups according to priority and Latin conventions.
This document summarizes several systems of plant classification including artificial, natural, and phylogenetic systems. It provides details on Linnaeus' artificial classification system based on plant sexuality and number of sexual parts. It also describes Bentham and Hooker's widely adopted natural system from 1862-1883, and Engler and Prantl's phylogenetic system from 1887-1915 which was based on evolutionary relationships and classified plants into 13 divisions.
The document discusses the history and evolution of taxonomic plant classification systems from ancient to modern times. It describes early artificial systems from 2000 BC based on single characteristics like use or appearance. Natural systems from the 1600s classified plants based on multiple natural characteristics. Phylogenetic systems from the 1800s classify plants based on evolutionary relationships revealed by modern techniques. The most widely accepted current systems combine natural and phylogenetic approaches.
The document defines and describes various parts of flowers including the pedicel, sepal, petal, perianth, calyx, corolla, androecium, gynoecium, as well as flower symmetry and types. It also discusses inflorescence structures such as spikes, racemes, umbels, heads, corymbs and spikelets. Different inflorescence examples like daisies, proteas, hawthorns and grasses are provided. The document provides morphological terminology for comprehensive description and identification of floral structures.
Rolf Dahlgren was a Danish botanist who published an influential plant classification system in 1975. He used a two-dimensional graphic system called a Dahlgrenogram to display phylogenetic relationships among plant groups. Dahlgren's system was based primarily on morphological and chemical characteristics and divided angiosperms into 31 superorders within two subclasses. While comprehensive, it considered only flowering plants and did not classify below the family level. Subsequent molecular studies have revised placements of some families from Dahlgren's system.
The International Code of Botanical Nomenclature (ICBN) governs the formal scientific names used for plants. Some key points:
- Carl Linnaeus is considered the father of modern taxonomy and introduced the system of scientific naming for species in 1753.
- Names are determined by nomenclature types and are based on priority of publication. Each taxonomic group can have only one correct scientific name.
- Names are revised in subsequent International Botanical Congresses starting in 1892 to establish standards for effective/valid publication, author citation, typification, and rejection of illegitimate names.
- Related codes also exist for zoological nomenclature, cultivated plants, bacteria,
The naming of taxonomic groups of plants is determined by nomenclatural types.This PPT explores the basic principles of ICBN with species emphasis on the nomenclatural types used in plant taxonomy intended for UG & PG students of Botany.
The Angiosperm Phylogeny Group (APG) is an international group of botanists who developed a modern, molecular-evidence based classification system for flowering plants known as the APG system. The APG system was first published in 1998 and is updated periodically, with the current version being APG IV from 2016. It is based on analysis of chloroplast and ribosomal DNA sequences. The APG system aims to make taxonomic groups monophyletic based on phylogenetic relationships, retains the Linnaean hierarchy of orders and families, and takes a broad approach in defining taxonomic limits. It recognizes 59 orders and 415 families within the angiosperms.
1. Plant taxonomy is the science of identifying, classifying, and naming plants based on their phenotypic characteristics.
2. The main objectives of plant taxonomy are to classify the plant kingdom, identify plants, and assign scientific names to plants.
3. Taxonomy aims to classify organisms into hierarchical taxa, assign scientific names to each taxon through nomenclature, and allow identification of organisms.
This PPT offers a birds' eye view of the Angiosperm Phylogeny Group III to cover the course content and its complexity.It also covers the emerging trend of the plants taxonomic domain.
The document summarizes the history of angiosperm classification from ancient times to modern systems like APG. It describes the early work of ancient Greek and Roman scholars like Theophrastus and Pliny. It then discusses the major historical periods of classification including the Period of Herbalists, Period of Mechanical Systems established by Linnaeus, Period of Natural Systems, and Period of Phylogenetic Systems influenced by Darwin's theory of evolution. Finally, it outlines the modern Angiosperm Phylogeny Group systems from APG I to the current APG IV, which is based on molecular data and recognizes 64 orders and 416 families of flowering plants.
Engler and Prantl's system of Plant Classificationmahesh s
The document summarizes the phylogenetic system of plant classification developed by Engler and Prantl. Some key points:
1) Engler and Prantl divided the plant kingdom into 13 divisions, with divisions 1-12 covering bacteria to non-flowering plants and division 13 covering seed plants.
2) They classified seed plants into gymnosperms, monocotyledons, and dicotyledons. Monocotyledons and dicotyledons were further divided into orders and families.
3) The system was the first to incorporate evolutionary principles but is not a true phylogenetic system by modern standards, with some groups considered incorrectly placed or unnatural.
The document discusses the principles and rules of the International Code of Nomenclature for algae, fungi, and plants (ICN). It describes how the ICN evolved from earlier codes established in the 19th century to provide internationally agreed upon rules for naming plant taxa. Key points covered include the establishment of the International Botanical Congress to govern the ICN, important milestones in the various international botanic congresses, the principles of priority and typification/type method that are fundamental to botanical nomenclature, and some examples of how these principles are applied.
after floral induction, the inflorescence meristem eventually forms the floral meristem. the process is controlled by an array of homeotic genes. this also involves microRNAs for their regulation
The document summarizes the International Code of Botanical Nomenclature (ICBN). It provides a brief history of botanical naming conventions beginning with Linnaeus' binomial system in 1753. It describes the subsequent meetings that have been held to refine the ICBN rules. The principles of the ICBN are to establish a stable and universal naming system through use of types, priority of publication, and Latin names. Key rules covered include ranks of taxa, typification, requirements for valid publication, author citation, and criteria for selecting correct names when taxa change ranks or are combined or divided. The overall aim of the ICBN is to provide consistency in botanical nomenclature.
Flower development in Arabidopsis thaliana is controlled by several key gene pathways. Flowering time genes determine how long the plant remains in a vegetative state before flowering. At least five pathways interact to control flowering time in response to factors like photoperiod and vernalization. Floral identity genes such as LFY, AP1, AP2, and CAL control the transition of shoot meristems into floral meristems and developing flowers. Organ identity genes including AP1, AP2, AP3, PI, and AG specify the development of floral organs into sepals, petals, stamens or carpels. Mutations in these genes disrupt normal flower development.
This document provides information about botanical nomenclature and the rules for scientific naming of plants. It discusses Carl Linnaeus who is considered the father of modern botanical nomenclature. The key points are: scientific names provide a uniform name for plants worldwide; names have specific Latinized suffixes for different taxonomic ranks; there are rules of priority, for nomenclatural types, and for effective publication of new names. Binomial nomenclature follows specific rules where the genus is capitalized and author is included. Some plants have a trinomial name with a subspecific rank.
The document discusses several theories about the origin and evolution of angiosperms. It describes theories that proposed various plant groups as possible ancestors of angiosperms including isoetes, conifers, gnetales, bennettitales, caytoniales, and pentoxylales. However, many of these theories were later contradicted or disagreed with based on evidence from vascular anatomy, seed structure, and other characteristics. The document also outlines primitive and advanced characteristics seen in different angiosperm groups, showing their diverse evolutionary lines.
The document discusses the orchid family (Orchidaceae). It describes their key characteristics such as perennial herbs that can be terrestrial, epiphytic or saprophytic. Their flowers are zygomorphic, hermaphroditic and epigynous. They have modified structures like the labellum, column and rostellum. Pollen is united into pollinia. They are one of the largest flowering plant families with over 1000 genera and 20,000 species found worldwide, especially in tropical areas. Orchids show primitive characteristics like pseudobulbs and advanced characteristics like diverse flower shapes and sizes and pollinia formation.
A group of cells which are similar in Origin and function but of more than One type in structure.
Water conducting tissue
Along with phloem make vascular tissue
Provide support to plants
1)Tracheary elements
These are nonliving cells, provide support and conduct water. Two types,
(a)Tracheids: elongate, tube like cell, tapering, rounded or oval ends, hard lignified walls.
(b)Vessels members: long, cylindrical, tube-like structures with lignified walls.
(2)Fibres: thick walls, evolve from tracheids and provide mechanical strength. Two types,
(a)Fibre-tracheids: medium thickness walls, have reduced boardered pits.
(b)Libriform fibres: very thick walls, have reduced simple pits.
Parenchyma cells: living cells, in woody plants, store of food in starch form. Two types:
(a)Axial parenchyma: derived from fusiform initials, have tracheary elements and fibres.
(b)Ray parenchyma: derived from ray initials of cambium, xylem ray cells.
Developmentally, xylem have two types
(1)Primary xylem: derived from procambium, developing from embryo, non-woody plants.
(2)Secondary xylem: from vascular cambium, second stage of plant development, in woody plants.
Angiosperm phlogeny group taxonomy classificationharitha shankar
The document summarizes the recent APG system of plant classification which is based on phylogenetic analysis of DNA sequences and morphological data. It outlines the main clades recognized in the system including basal angiosperms containing Amborellaceae, Nymphaeales and monocots. Magnolids contain four orders while eudicots are divided into basal and core eudicots. Core eudicots include rosids and asterids, with rosids further divided into eurosids I and II. Each clade contains representative orders and families. The APG system strictly follows the principle of monophyly and is based on evidence from multiple sources, though some limitations remain regarding placement of some families.
This document provides an overview of gymnosperms, including their general characters, classification, and examples. It discusses how gymnosperms are woody, vascular plants whose seeds are not enclosed in fruits. They are classified into 5 orders - Cycadales, Coniferales, Ephadrales, Gnetales, and Ginkgoales. Examples like cycas, conifers, ephedra, gnetum, and ginkgo biloba are described. The classification system proposed by David Bierhost in 1971 is outlined.
This PPT offers a bird's eye view of ICBN and its different rules along with regulations for the naming of plants. It also highlights the history of IBC and its contribution to plant taxonomy.
The naming of taxonomic groups of plants is determined by nomenclatural types.This PPT explores the basic principles of ICBN with species emphasis on the nomenclatural types used in plant taxonomy intended for UG & PG students of Botany.
The Angiosperm Phylogeny Group (APG) is an international group of botanists who developed a modern, molecular-evidence based classification system for flowering plants known as the APG system. The APG system was first published in 1998 and is updated periodically, with the current version being APG IV from 2016. It is based on analysis of chloroplast and ribosomal DNA sequences. The APG system aims to make taxonomic groups monophyletic based on phylogenetic relationships, retains the Linnaean hierarchy of orders and families, and takes a broad approach in defining taxonomic limits. It recognizes 59 orders and 415 families within the angiosperms.
1. Plant taxonomy is the science of identifying, classifying, and naming plants based on their phenotypic characteristics.
2. The main objectives of plant taxonomy are to classify the plant kingdom, identify plants, and assign scientific names to plants.
3. Taxonomy aims to classify organisms into hierarchical taxa, assign scientific names to each taxon through nomenclature, and allow identification of organisms.
This PPT offers a birds' eye view of the Angiosperm Phylogeny Group III to cover the course content and its complexity.It also covers the emerging trend of the plants taxonomic domain.
The document summarizes the history of angiosperm classification from ancient times to modern systems like APG. It describes the early work of ancient Greek and Roman scholars like Theophrastus and Pliny. It then discusses the major historical periods of classification including the Period of Herbalists, Period of Mechanical Systems established by Linnaeus, Period of Natural Systems, and Period of Phylogenetic Systems influenced by Darwin's theory of evolution. Finally, it outlines the modern Angiosperm Phylogeny Group systems from APG I to the current APG IV, which is based on molecular data and recognizes 64 orders and 416 families of flowering plants.
Engler and Prantl's system of Plant Classificationmahesh s
The document summarizes the phylogenetic system of plant classification developed by Engler and Prantl. Some key points:
1) Engler and Prantl divided the plant kingdom into 13 divisions, with divisions 1-12 covering bacteria to non-flowering plants and division 13 covering seed plants.
2) They classified seed plants into gymnosperms, monocotyledons, and dicotyledons. Monocotyledons and dicotyledons were further divided into orders and families.
3) The system was the first to incorporate evolutionary principles but is not a true phylogenetic system by modern standards, with some groups considered incorrectly placed or unnatural.
The document discusses the principles and rules of the International Code of Nomenclature for algae, fungi, and plants (ICN). It describes how the ICN evolved from earlier codes established in the 19th century to provide internationally agreed upon rules for naming plant taxa. Key points covered include the establishment of the International Botanical Congress to govern the ICN, important milestones in the various international botanic congresses, the principles of priority and typification/type method that are fundamental to botanical nomenclature, and some examples of how these principles are applied.
after floral induction, the inflorescence meristem eventually forms the floral meristem. the process is controlled by an array of homeotic genes. this also involves microRNAs for their regulation
The document summarizes the International Code of Botanical Nomenclature (ICBN). It provides a brief history of botanical naming conventions beginning with Linnaeus' binomial system in 1753. It describes the subsequent meetings that have been held to refine the ICBN rules. The principles of the ICBN are to establish a stable and universal naming system through use of types, priority of publication, and Latin names. Key rules covered include ranks of taxa, typification, requirements for valid publication, author citation, and criteria for selecting correct names when taxa change ranks or are combined or divided. The overall aim of the ICBN is to provide consistency in botanical nomenclature.
Flower development in Arabidopsis thaliana is controlled by several key gene pathways. Flowering time genes determine how long the plant remains in a vegetative state before flowering. At least five pathways interact to control flowering time in response to factors like photoperiod and vernalization. Floral identity genes such as LFY, AP1, AP2, and CAL control the transition of shoot meristems into floral meristems and developing flowers. Organ identity genes including AP1, AP2, AP3, PI, and AG specify the development of floral organs into sepals, petals, stamens or carpels. Mutations in these genes disrupt normal flower development.
This document provides information about botanical nomenclature and the rules for scientific naming of plants. It discusses Carl Linnaeus who is considered the father of modern botanical nomenclature. The key points are: scientific names provide a uniform name for plants worldwide; names have specific Latinized suffixes for different taxonomic ranks; there are rules of priority, for nomenclatural types, and for effective publication of new names. Binomial nomenclature follows specific rules where the genus is capitalized and author is included. Some plants have a trinomial name with a subspecific rank.
The document discusses several theories about the origin and evolution of angiosperms. It describes theories that proposed various plant groups as possible ancestors of angiosperms including isoetes, conifers, gnetales, bennettitales, caytoniales, and pentoxylales. However, many of these theories were later contradicted or disagreed with based on evidence from vascular anatomy, seed structure, and other characteristics. The document also outlines primitive and advanced characteristics seen in different angiosperm groups, showing their diverse evolutionary lines.
The document discusses the orchid family (Orchidaceae). It describes their key characteristics such as perennial herbs that can be terrestrial, epiphytic or saprophytic. Their flowers are zygomorphic, hermaphroditic and epigynous. They have modified structures like the labellum, column and rostellum. Pollen is united into pollinia. They are one of the largest flowering plant families with over 1000 genera and 20,000 species found worldwide, especially in tropical areas. Orchids show primitive characteristics like pseudobulbs and advanced characteristics like diverse flower shapes and sizes and pollinia formation.
A group of cells which are similar in Origin and function but of more than One type in structure.
Water conducting tissue
Along with phloem make vascular tissue
Provide support to plants
1)Tracheary elements
These are nonliving cells, provide support and conduct water. Two types,
(a)Tracheids: elongate, tube like cell, tapering, rounded or oval ends, hard lignified walls.
(b)Vessels members: long, cylindrical, tube-like structures with lignified walls.
(2)Fibres: thick walls, evolve from tracheids and provide mechanical strength. Two types,
(a)Fibre-tracheids: medium thickness walls, have reduced boardered pits.
(b)Libriform fibres: very thick walls, have reduced simple pits.
Parenchyma cells: living cells, in woody plants, store of food in starch form. Two types:
(a)Axial parenchyma: derived from fusiform initials, have tracheary elements and fibres.
(b)Ray parenchyma: derived from ray initials of cambium, xylem ray cells.
Developmentally, xylem have two types
(1)Primary xylem: derived from procambium, developing from embryo, non-woody plants.
(2)Secondary xylem: from vascular cambium, second stage of plant development, in woody plants.
Angiosperm phlogeny group taxonomy classificationharitha shankar
The document summarizes the recent APG system of plant classification which is based on phylogenetic analysis of DNA sequences and morphological data. It outlines the main clades recognized in the system including basal angiosperms containing Amborellaceae, Nymphaeales and monocots. Magnolids contain four orders while eudicots are divided into basal and core eudicots. Core eudicots include rosids and asterids, with rosids further divided into eurosids I and II. Each clade contains representative orders and families. The APG system strictly follows the principle of monophyly and is based on evidence from multiple sources, though some limitations remain regarding placement of some families.
This document provides an overview of gymnosperms, including their general characters, classification, and examples. It discusses how gymnosperms are woody, vascular plants whose seeds are not enclosed in fruits. They are classified into 5 orders - Cycadales, Coniferales, Ephadrales, Gnetales, and Ginkgoales. Examples like cycas, conifers, ephedra, gnetum, and ginkgo biloba are described. The classification system proposed by David Bierhost in 1971 is outlined.
This PPT offers a bird's eye view of ICBN and its different rules along with regulations for the naming of plants. It also highlights the history of IBC and its contribution to plant taxonomy.
This document provides an overview of the taxonomy and classification of cultivated plants. It discusses the history of plant taxonomy from ancient Greek and Roman times through Linnaeus' establishment of binomial nomenclature in the 1700s. It also describes the development of different nomenclature codes and rules over time to standardize naming, including the International Code of Nomenclature for Cultivated Plants. The document uses examples like rice taxonomy to illustrate hierarchical classification systems and discusses ongoing debates around defining taxonomic ranks.
This document discusses the systematics of living organisms and taxonomy. It describes different systems of classification including artificial, natural, and phylogenetic systems. The key points are:
1) Taxonomy involves classifying organisms in a hierarchical system with categories ranging from domain to species. 2) Binomial nomenclature uses scientific names with two parts, genus and species, which are universally accepted. 3) Modern phylogenetic classification is based on evolutionary relationships and considers genetic/molecular data.
The document provides information on plant systematics and the history of botanical nomenclature. It discusses:
1) Plant systematics aims to reconstruct plant evolutionary history and divides plants into taxonomic groups using various data.
2) Three approaches to plant classification - cladistics, phenetics, and phyletics - are described.
3) The establishment of the International Code of Botanical Nomenclature (ICBN) in 1930 provided internationally accepted rules for naming plants. The ICBN has been modified over time at successive International Botanical Congresses.
The document summarizes the contributions of Theophrastus and Carl Linnaeus to the fields of botany and taxonomy. It notes that Theophrastus was Aristotle's successor and is considered the father of botany, classifying plants into four groups and describing nearly 500 species. It then discusses Carl Linnaeus and his development of the binomial nomenclature system and a classification system based on plant reproductive structures, which became widely used despite having limitations in accurately reflecting relationships.
- Taxonomy is the science and practice of classifying organisms based on similarities and differences. It has a long history dating back to ancient Greek and Roman herbalists who classified plants based on uses and appearances.
- Major figures like Theophrastus, Dioscorides, Albertus Magnus, and later herbalists and botanists worked to systematically name and group plant species. Carolus Linnaeus developed the Linnean system of binomial nomenclature still used today.
- There are three main approaches to taxonomy - phenetics based on overall similarity, cladistics on shared derived characteristics, and evolutionary taxonomy combining lineage and divergence. Modern classification systems continue to be refined.
Description of flowering plants in botanical terms in relation to taxonomyNew...GiriShardenduN
The document describes key aspects of plant taxonomy and classification systems. It discusses:
1) The main parts of a flower - calyx, corolla, androecium, gynoecium - and their characteristics.
2) Taxonomy systems including artificial, natural, and phylogenetic and how they classify plants.
3) Modern trends in plant taxonomy including morphological, anatomical, palynological, chemotaxonomic, and numerical approaches.
1.Definition and basic concepts of Biosystematics, , Historical perspectives of Biosystematics and Taxonomy, Stages of taxonomic procedures-alpha taxonomy, Beta taxonomy and Gamma taxonomy,
Neo taxonomy.
Objectives and History of-Plant-Taxonomy.pptxflorachandran
The document provides an overview of the history and objectives of plant taxonomy. It discusses key figures and their contributions from ancient times through the modern era, including Theophrastus, Pliny the Elder, Dioscorides, Parasara, Albertus Magnus, Linnaeus, de Jussieu, and modern systems proposed by Takhtajan, Cronquist, Dahlgren, and Thorne. It also outlines the development of classification schemes from phenetic to phylogenetic approaches and the future directions of being dynamic, interdisciplinary, and shaped by new technologies.
This document provides an overview of the history and development of taxonomy. It discusses early Eastern and Western classifiers from 3000 BC to the 1700s AD such as Shen Nung, Aristotle, Theophrastus, and Linnaeus. It then summarizes advances from the 1600s to present, including the establishment of the biological species concept, evolutionary taxonomy based on cladistics and phylogenetics, and the increasing use of genetic data to construct phylogenetic trees.
This document provides an overview of a course on the survey of angiosperm families.
The course covers topics such as the classification of angiosperms, principles of angiosperm taxonomy including hierarchical categories and nomenclature, identification techniques, and descriptions of selected families. Learning outcomes include classifying plants, identifying unknown families, applying scientific names, and understanding the importance of flowering plants.
The course is divided into parts that cover the angiosperms and their position in the plant kingdom, objectives of angiosperm taxonomy and the development of taxonomic thought from Aristotle to modern systems, and descriptions of orders and families. Assessment includes classifying plants into orders and families and identifying unknown species.
From its initiation in 1998, the Angiosperm Phylogeny Group (APG) has focused on the production of an ever-more stable system of classification of the flowering plants (angiosperms). Based largely on analyses of DNA sequence data, the system is compiled by a larger group of experts than any previous system and has the advantage of being testable, allowing for confidence levels in the system to be estimated for the first time.
Emp1003 biodiversity and classificationAntoine Vella
This presentation describes how organisms are classified by biologists (taxonomy) and how the system developed. There is also a very brief description of the main taxa.
It describes the basics of Plant classification, morphological, anatomical, palynological, embryological, chemical and cytological evidences of classification
Carl Linnaeus established the foundations of modern taxonomy in the 18th century with works like Systema Naturae and Species Plantarum which introduced binomial nomenclature. Over subsequent centuries, various scientists improved and developed taxonomic methods. Rules for botanical nomenclature were established in the 19th century to promote stability of scientific names. The development of evolutionary theory in the mid-19th century led to a shift from classification based only on observable characteristics to classifications attempting to reflect evolutionary relationships and phylogenies.
The document discusses the history of taxonomy from its earliest developments in China and ancient Greece through the modern Linnaean era. It notes that the Chinese emperor Shen Nung in around 3000 BC is considered the "Father of Chinese medicine" and helped develop early plant classification. It then focuses on Linnaeus, describing him as founding modern taxonomy by introducing binomial nomenclature in his works Species Plantarum in 1753 and Systema Naturae in 1758. These works established many of the rules that taxonomists use today to systematically classify and name organisms.
The document discusses the history of taxonomy from its earliest developments in China and ancient Greece through the modern Linnaean era. It notes that the Chinese emperor Shen Nung in around 3000 BC is considered the "Father of Chinese medicine" and helped develop early plant classification. It then focuses on Linnaeus, describing how he established modern taxonomy with works like Species Plantarum in 1753, introducing binomial nomenclature that provided standardized scientific names for organisms. Linnaeus helped transform botany and zoology into scientific disciplines through establishing standard terminology and processes for classification.
This document discusses the history of taxonomy from its earliest developments in ancient China and Greece to modern times. It describes how early taxonomists like Aristotle, Theophrastus, and Dioscorides began classifying and naming organisms. It then focuses on the pivotal contributions of Carl Linnaeus in the 1700s, who established the binomial nomenclature system still used today. The document also discusses how taxonomy evolved after Linnaeus to increasingly reflect evolutionary relationships, with influential post-Linnaean taxonomists and the development of standardized nomenclature rules.
The document discusses the history and development of taxonomy from its earliest forms in ancient China through the modern era. It covers key figures and works that advanced the field, such as the first herbal works in ancient Egypt and Greece, early classification systems, Carolus Linnaeus's seminal contributions in the 1700s that established the modern binomial nomenclature system, the development of rules for nomenclature in the 19th century, and the shift from morphological to molecular techniques in recent decades. The document traces how taxonomy transformed from early herbalism and classification into the formal scientific discipline it is today.
Similar to New Microsoft PowerPoint Presentation.pptx (20)
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Microbial characterisation and identification, and potability of River Kuywa ...Open Access Research Paper
Water contamination is one of the major causes of water borne diseases worldwide. In Kenya, approximately 43% of people lack access to potable water due to human contamination. River Kuywa water is currently experiencing contamination due to human activities. Its water is widely used for domestic, agricultural, industrial and recreational purposes. This study aimed at characterizing bacteria and fungi in river Kuywa water. Water samples were randomly collected from four sites of the river: site A (Matisi), site B (Ngwelo), site C (Nzoia water pump) and site D (Chalicha), during the dry season (January-March 2018) and wet season (April-July 2018) and were transported to Maseno University Microbiology and plant pathology laboratory for analysis. The characterization and identification of bacteria and fungi were carried out using standard microbiological techniques. Nine bacterial genera and three fungi were identified from Kuywa river water. Clostridium spp., Staphylococcus spp., Enterobacter spp., Streptococcus spp., E. coli, Klebsiella spp., Shigella spp., Proteus spp. and Salmonella spp. Fungi were Fusarium oxysporum, Aspergillus flavus complex and Penicillium species. Wet season recorded highest bacterial and fungal counts (6.61-7.66 and 3.83-6.75cfu/ml) respectively. The results indicated that the river Kuywa water is polluted and therefore unsafe for human consumption before treatment. It is therefore recommended that the communities to ensure that they boil water especially for drinking.
Evolving Lifecycles with High Resolution Site Characterization (HRSC) and 3-D...Joshua Orris
The incorporation of a 3DCSM and completion of HRSC provided a tool for enhanced, data-driven, decisions to support a change in remediation closure strategies. Currently, an approved pilot study has been obtained to shut-down the remediation systems (ISCO, P&T) and conduct a hydraulic study under non-pumping conditions. A separate micro-biological bench scale treatability study was competed that yielded positive results for an emerging innovative technology. As a result, a field pilot study has commenced with results expected in nine-twelve months. With the results of the hydraulic study, field pilot studies and an updated risk assessment leading site monitoring optimization cost lifecycle savings upwards of $15MM towards an alternatively evolved best available technology remediation closure strategy.
Optimizing Post Remediation Groundwater Performance with Enhanced Microbiolog...Joshua Orris
Results of geophysics and pneumatic injection pilot tests during 2003 – 2007 yielded significant positive results for injection delivery design and contaminant mass treatment, resulting in permanent shut-down of an existing groundwater Pump & Treat system.
Accessible source areas were subsequently removed (2011) by soil excavation and treated with the placement of Emulsified Vegetable Oil EVO and zero-valent iron ZVI to accelerate treatment of impacted groundwater in overburden and weathered fractured bedrock. Post pilot test and post remediation groundwater monitoring has included analyses of CVOCs, organic fatty acids, dissolved gases and QuantArray® -Chlor to quantify key microorganisms (e.g., Dehalococcoides, Dehalobacter, etc.) and functional genes (e.g., vinyl chloride reductase, methane monooxygenase, etc.) to assess potential for reductive dechlorination and aerobic cometabolism of CVOCs.
In 2022, the first commercial application of MetaArray™ was performed at the site. MetaArray™ utilizes statistical analysis, such as principal component analysis and multivariate analysis to provide evidence that reductive dechlorination is active or even that it is slowing. This creates actionable data allowing users to save money by making important site management decisions earlier.
The results of the MetaArray™ analysis’ support vector machine (SVM) identified groundwater monitoring wells with a 80% confidence that were characterized as either Limited for Reductive Decholorination or had a High Reductive Reduction Dechlorination potential. The results of MetaArray™ will be used to further optimize the site’s post remediation monitoring program for monitored natural attenuation.
RoHS stands for Restriction of Hazardous Substances, which is also known as t...vijaykumar292010
RoHS stands for Restriction of Hazardous Substances, which is also known as the Directive 2002/95/EC. It includes the restrictions for the use of certain hazardous substances in electrical and electronic equipment. RoHS is a WEEE (Waste of Electrical and Electronic Equipment).
Epcon is One of the World's leading Manufacturing Companies.EpconLP
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Water polluted by dyestuffs compounds is a global threat to health and the environment; accordingly, we prepared a green novel sorbent chemical and Physical system from an algae, chitosan and chitosan nanoparticle and impregnated with algae with chitosan nanocomposite for the sorption of Malachite green dye from water. The algae with chitosan nanocomposite by a simple method and used as a recyclable and effective adsorbent for the removal of malachite green dye from aqueous solutions. Algae, chitosan, chitosan nanoparticle and algae with chitosan nanocomposite were characterized using different physicochemical methods. The functional groups and chemical compounds found in algae, chitosan, chitosan algae, chitosan nanoparticle, and chitosan nanoparticle with algae were identified using FTIR, SEM, and TGADTA/DTG techniques. The optimal adsorption conditions, different dosages, pH and Temperature the amount of algae with chitosan nanocomposite were determined. At optimized conditions and the batch equilibrium studies more than 99% of the dye was removed. The adsorption process data matched well kinetics showed that the reaction order for dye varied with pseudo-first order and pseudo-second order. Furthermore, the maximum adsorption capacity of the algae with chitosan nanocomposite toward malachite green dye reached as high as 15.5mg/g, respectively. Finally, multiple times reusing of algae with chitosan nanocomposite and removing dye from a real wastewater has made it a promising and attractive option for further practical applications.
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The popularity of functional foods among scientists and common people has been increasing day by day. Awareness and modernization make the consumer think better regarding food and nutrition. Now a day’s individual knows very well about the relation between food consumption and disease prevalence. Humans have a diversity of microbes in the gut that together form the gut microflora. Probiotics are the health-promoting live microbial cells improve host health through gut and brain connection and fighting against harmful bacteria. Bifidobacterium and Lactobacillus are the two bacterial genera which are considered to be probiotic. These good bacteria are facing challenges of viability. There are so many factors such as sensitivity to heat, pH, acidity, osmotic effect, mechanical shear, chemical components, freezing and storage time as well which affects the viability of probiotics in the dairy food matrix as well as in the gut. Multiple efforts have been done in the past and ongoing in present for these beneficial microbial population stability until their destination in the gut. One of a useful technique known as microencapsulation makes the probiotic effective in the diversified conditions and maintain these microbe’s community to the optimum level for achieving targeted benefits. Dairy products are found to be an ideal vehicle for probiotic incorporation. It has been seen that the encapsulated microbial cells show higher viability than the free cells in different processing and storage conditions as well as against bile salts in the gut. They make the food functional when incorporated, without affecting the product sensory characteristics.
2. Contents
Introduction
Plant Classification system
Artificial system of classification
Natural system of Classification
Phylogenetic system of classification
Contribution of taxonomists to plant classification
3. What is Plant systematics?
Plant systematics is a science that includes and encompasses
traditional taxonomy; however, its primary goal is to reconstruct the
evolutionary history of plant life.
It divides plants into taxonomic groups, using morphological,
anatomical, embryological, chromosomal, and chemical data.
However, the science differs from straight taxonomy in that it
expects the plants to evolve, and documents that evolution.
Determining phylogeny - the evolutionary history of a particular
group - is the primary goal of systematics.
4. Systems of plant classification
Artificial system of classification
Natural system of classification
Phylogenetic System of Classification
5. Artificial classification system
When plants are classified for the sake of convenience
only, using some arbitrary or easily observable
characteristics the classification is called artificial.
Eg: Theophrastus classification of Habit- Herbs, Shrubs
and trees.
One of the most familiar artificial systems is that of
Linnaeus, where he employed a number of stamens as one
of the important characters in his system of classification.
He grouped plants into 24 classes.
6. Carolus Linnaeus
Carl Linnaeus was the famous 1700s Swedish botanist, who produced the fundamental
biological taxonomy — the so-called binomial classification system.
It is the first step toward today’s taxonomic system.
Linnaeus’ classification, at its most fundamental, uses the twin “genus, species,”
nomenclature to classify microorganisms.
He introduced the hierarchy of class, order, genus, and species.
He provided workable keys for the identification of plants and animals.
7. • The most important publications of Linnaeus related to his system of classification are
systema naturae (1735), Flora Lipponica (1737), Genera Plantarum (1737) and Species
Plantarum (1735).
• Linnaeus mainly employed the characters of stamens and carpels and that is why the
system is called as Sexual system of classification.
• Further- he took into account the number of stamens for classification and so the
system is also named as numerical classification.
• The basis of classification proposed by Linnaeus are as under:
• i) Number of Stamens (I-XI1 classes)
• ii) Size of Stamen (XIV-XV classes)
• iii) Cohesion of filaments into bundles (XVI-XVIII)
• iv) Cohesion of anthers (XIx)
• v) Stamens adnate to ovary (xx)
• vi) Distribution of sex in plants (XXI-XXIII)
• vii) Plant without flower (XxIv)
8. Natural Classification
Natural systems of classification reflect the situation as it
might have existed in nature.
This clearly means that all the plant existing today are
related and should be grouped together to form a natural
group.
The system of Bentham and Hooker is a good example of
Natural System of Classification.
9. Antoine Laurent de Jussieu (1686-1758):
French botanist, 1789- Genera Plantarum.
He classified the plants based on the position of the stamens with respect to ovary
- 15 classes
1. Acotyledons - Class 1
2. Monocotyledons
Stamens hypogynous - class 2
Stamens perigynous - class 3
Stamens epigynous - class 4
3.Dicotyledons
A) Apetalae
Stamens hypogynous - class 5
Stamens perigynous - class 6
Stamens epigynous - class 7
10. B) Monpetalae
Corolla hypogynous - class 8
Corolla perigynous - class 9
Corolla epigynous
Anthers connate Class 10
Anthers free Class 11
C) Polypetalae
Stamens hypogynous - class 12
Stamens perigynous class 13
Stamens epigynous Class 14
D)Declines irregularis (Corolla generally absent and male and female flowers on different plants)- Class 15
11. Robert Brown (1773-1858)
• Scottish botanist, contributed to understanding of morphology of flower and
seeds.
• He was the first person to differentiate gymnosperms from Angiosperms.
• Published Prodromus Florae Novae Hollondiae -1827, by following de Jussieu
classification
12. Augustin Pyrame de Candolle (1778-1841):
French botanist, worked in Switzerland. Published work - Theorie
elementaire de la botanique- 1813 Paris
He divide dicotyledons into two groups - Presence or absence of petals.
I. Vasculares: (with vascular bundles/cotyledons):
Class 1. Exogenae( Dicotyledanae: Vascular bundles in ring, two cotyledons)
A. Diplochylamydae (Flowers with 2 whorls of perianth, calyx and corolla)
Thalamiflorae (Polypetalous and hypogynous)
Calyciflorae (Perigynous or epigynous)
Corolliflorae(Gamopetalous and Hypogynous)
B . Monochylamdae ( Flowers with single whorl of perianth)
13. Class2 : Endogenae (Monocotyledanae, vascular bundles sacttered, cotyledon
one)
A. Phanerogamae (Flowers present)
B.Cryptogamae (Flowers absent, hidden or unknown)
II. Cellulares (Plants without vascular bundles/cotyledons)
Class 1. Foliaceae (leafy and sexual, includes mosses and liverworts)
Class 2. Aphyllae (Leafless and without known sexes, algae, fungi and lichens)
Drawback: Inclusion of vascular cryptogams among monocotyledons.
Works: Prodromus systematis Naturalis Regni Vegetabilis - 1824-1873
Where, he gave explaination of all seed plants
14. Phylogenetic system of classification
Phylogenetic systems of classification are those where the plants are classified
according to their evolutionary tendencies.
It may be pointed out clearly that due to incomplete fossil records it is not
possible to claim a system as a perfect phylogenetic one.
The phylogenetic classification is usually designed on the basis of natural
classification.
The systems of classification proposed by Engler and Prantl (1887-1915),
Hutchinson (1926-34), (1959 and 1973), and Takhtajan (1964,1969,1973 and 1980)
are excellent examples of phylogenetic classification.
15. Micheal Adanson
Michel Adanson was an 18th-century French botanist who made several significant contributions to the field of
botany. Here is a list of some of his notable contributions in chronological order:
1. Familles des Plantes (1763): Adanson published his most famous work, "Familles des Plantes," in which he
proposed a new system of plant classification based on the structure of the reproductive organs of plants, rather than
the traditional Linnaean system based on flower characteristics.
2. Definition of Genus: Adanson introduced the concept of a genus (plural: genera) in botany. He defined a genus as
a group of species that share a common fundamental structural plan.
3. Theoretical Botany: Adanson's work laid the foundation for the development of theoretical botany, which focused
on the study of plant structure and its implications for classification.
4. African Plant Studies: Adanson made significant contributions to the study of African plants, particularly those
from Senegal. He documented and described many previously unknown species and introduced them to the
European botanical community.
16. Micheal Adanson
5. Taxonomic Principles: Adanson's work emphasized the importance of using a wide range of characters
for plant classification, which included morphological, anatomical, and reproductive features. He
believed that these comprehensive characteristics should be considered when classifying plants.
6. Botanical Nomenclature: Adanson's work contributed to discussions on botanical nomenclature and
the naming of plant species. While his classification system did not gain widespread acceptance, it did
influence later developments in plant taxonomy.
Adanson's contributions to botany, particularly his innovative ideas on plant classification, had a lasting
impact on the field and influenced the work of later botanists and taxonomists
17. Alphonso de Candole
Alphonse de Candolle was a Swiss botanist who made significant contributions to the field of
taxonomy.
He is credited with coining the term “taxonomy” and developing a system of plant classification
based on structural criteria.
In his book, “Théorie élémentaire de la botanique,” published in 1813, he argued that plant
anatomy, not physiology, should be the sole basis of classification.
Candolle’s criteria provided the empirical foundation for a modern evolutionary history of plants and
his system of plant classification found nearly universal application for half a century, during which
time it served as a model for other systems.
In addition to his work in taxonomy, Candolle also conceptualized the idea of “Nature’s war,” which
influenced Darwin’s principle of natural selection.
He believed that multiple species developed similar characteristics that were not present in a
common evolutionary ancestor.
20. Concepts of Taxonomic hierarchy
Genus:
Genus is a taxonomic rank used to classifying organism based on their similar charecteristics,It is the
classification above the level of species.
It is the minor category.
It is one of the names making a binomial
It is niether Latin or latinised
Species:
It is the basic unit of classification, latin/Latinised, second part of binomial.
Intraspecific categories:
Any category below rank of speceies
Eg:Subspecies, Varieties and forms
21. Species concept:
Species is lowest form of biological unit - Crombie 1950
Varied definition over time:
1. As a name in book
2.As a judgement
3. As a group of individuals which in totality of their attributes resemble each otherto a degree usually
regarded as specific.
4. Smallest group with distinctive charecters
5. As discrete and immutable entity of divine origin.
On basis of such definitions, there are 3 types of species concept
1. Nominalistic: Used for nomenclature, used by ICBN
2. Taxonomical species concept:
Morphological: A group of individuals with common morphological charecters.
22. Typological:
species- specere, - appearnce. Aristotle - biological organisms has an “invariant
generalised or idealised pattern shared by all members of the group’’.
Morphogeographical species:
Du Reitz - 1930, A species is a population that has similar morphological charecters with
geographical isolation.
3. Biological species :
Love -1964, 1. Genetical basis of variation, 2. Reproductive mechanism, 3.Hybridisation,
4. Isolating mechanism.
They shouldd show interbredding among individuals of a population
There should be reproductive isolation between members of two separate popultions
23. Family concept:
Higher category than genus and species and recognised by ICBN.
Single genera (Cannaceae), or multiple genera
Criteria for a family:
1. Phylogenetic unit
It is an ecological unit - Orchidaceae- Epiphytic, Mycorrhizal association
Must be different and separable from other families by discontinous variation.
24. Botanical Nomenclature
Linnaeus - 1737
Augustine de Candole - Theorie Elementaire de la Botanique - account of
plant nomenclature - 1813
These rules were adopted by ICBN.
ICBN session- Paris Aug 1867.
Cambridge Congress -1930- Nomenclature came into useage.
The current useage of nomenclature came into being - 1978.- 12 th ICBN
congress in Lenigard, Russia (1975).
25. Binomial Nomenclature
Polynomial system- Eg: Gravellia robusta grandiflora australiana - Polynomial
Gaspard Bauhin 1560-1624- Two names of plants.
Distinction between the generic name and specific epithet of the plants.
Carolus Linnaeus- Species Plantarum- 1753.
Why latin?
1. It is specific
Precise and concise
Pertinent to the eneds of descriptive phases of natural sciences
Being a dead language - no political problem
26. International Code of Botanical Nomenclature
(ICBN)
It is an international code or deed for writing the name of world flora. The
naming of plants
are following according to the rule of ICBN after its establishment. The ICBN
only deals and
control to the naming of plants but does not do any work on taxonomy. The
head office of
ICBN is situated at Atrect in the Netherlands. It has three departments
namely, principles,
rules and provisions for the governance of the code.
27. A. Principles of ICBN
There are six principles of ICBN for naming of plants
Principle 1:
Botanical nomenclature is independent of zoological and
bacteriologicalnomenclature.
Principle 2:
The application of names of taxonomic groups is determined by means
ofnomenclatural types.
28. Principle 3:
The nomenclature of a taxonomic group is based upon priority of publication.
Principle 4:
Each taxonomic group with a particular circumscription, position, and rank can
bear only one correct name, the earliest that is in accordance with the Rules,
except inspecified cases.
Principle 5:
Scientific names of taxonomic groups are treated as Latin regardless of their
derivation.
Principle 6:
The rules of nomenclature are retroactive unless expressly limited.
29. Rules and recommendation of ICBN
1. Rank of taxa: The ICBN provides the series of rank with names which are the hierarchial catagories.
2. Rule 2- Type method:
Holotype: One specimen or element used or designated by the author in the original publication as the main
nomencaltural type. Any type after publication cannot be considered Holotype.
Isotype: Duplicate specimen of a holotype. They are plants forming part of the same gathering as the holotype
or growing with it / gathered with it.
Syntype: A syntype is one or two or more specimens studied and cited by the author, when holotype is not
designated by him
Paratype: Specimen cited with original description in addition to the holotype.
Lectotype/Neotype: When author fails to designate a holotype, or holotype is missing.
Lectotype: Specimen selected from those cited by the author with the original description.
Neotype: Specimen selected from the material that was not cited by the author with the original description
30. Rule 3 Priority of Names
1.Priority is concerned with the precedence of the date of valid
publication and determines acceptance of one of two or more
names that are otherwise acceptable.
2.A name is said to be legitimate if it is accordance with the rules
and illegitimate if it is contrary.
31. Rule 4 Effective and Valid Publications of Names
1. The names of taxa must meet the requirement of the Code when it is published.
2. It is effective under this code only when the distribution of printed is performed properly.
3. It should beeffectively published i.e. in a journal
4. It should be published inacorrect form i.e.Latinized with rank indicated and with Latin description
(maybein brief).
5. More detailed description is given in vernacular language.
6. For the taxa of the rank of genus and below.
7. Nomenclature type must be indicated and location ofthe type also indicated.
8. If the names are published effectively and validly using the rules of ICBN then the names are legitimate
otherwise they are illegitimate.
9. The name ofthe newly described taxon is usually indicated by words sp.nov (species nova);gen.nov.(genus
novum)