Plant taxonomy deals with the identification, nomenclature, and classification of plants. Anatomy and cytology can provide information to aid plant taxonomy. Features of the epidermis, nodes, and chromosomes like size, morphology, and behavior during meiosis can help distinguish between plant groups and families. Cytological studies have shown close associations between certain families like Cyperaceae and Juncaceae, and differentiated species in genera such as Chlorophytum based on chromosome number and structure.
Angiosperm Phylogeny Group classification
APG I
APG II
APG III
APG IV
Molecular Based system
features and organization
Merits and demerits
Difference in APG system.
evidences of anatomy, cytology and chemistry to plant taxonomynasira jaffry
taxonomy is based on other disciplines of sciences. in this presentation, there is discussion how anatomy, cytology and chemistry influnces the taxonomy
What is Meristematic Tissue? Carl Wilhelm von Nägeli coined the term “meristem.” Meristematic tissue contains undifferentiated cells, which are the building blocks of the specialized plant structures. Meristematic tissues contain living cells with varied shapes.
Angiosperm Phylogeny Group classification
APG I
APG II
APG III
APG IV
Molecular Based system
features and organization
Merits and demerits
Difference in APG system.
evidences of anatomy, cytology and chemistry to plant taxonomynasira jaffry
taxonomy is based on other disciplines of sciences. in this presentation, there is discussion how anatomy, cytology and chemistry influnces the taxonomy
What is Meristematic Tissue? Carl Wilhelm von Nägeli coined the term “meristem.” Meristematic tissue contains undifferentiated cells, which are the building blocks of the specialized plant structures. Meristematic tissues contain living cells with varied shapes.
Embyrology in relation to Taxonomy. It is one of the concepts in Modern Taxonomy.in which embryological data is used to strengthen existing classification system.
This PPT explains about the various methods and steps of preparation of herbarium specimens. It also describes the various functions performed by herbaria and the various major herbaria of world as well as in India.
This presentation was given by Dr. Avishek Bhattacharjee in Botanical Nomenclature Course held in Botanical Survey of India, Eastern Regional Centre, Shillong in November 2016. This may be helpful to the undergraduate and post graduate Botany students to understand different types of taxonomic literature, especially Flora, Revision and Monograph.
Classification denotes the arrangement of a single plant or group of plants an distinct category following a system of nomenclature, and in accordance with a particular and well established plan.
Embyrology in relation to Taxonomy. It is one of the concepts in Modern Taxonomy.in which embryological data is used to strengthen existing classification system.
This PPT explains about the various methods and steps of preparation of herbarium specimens. It also describes the various functions performed by herbaria and the various major herbaria of world as well as in India.
This presentation was given by Dr. Avishek Bhattacharjee in Botanical Nomenclature Course held in Botanical Survey of India, Eastern Regional Centre, Shillong in November 2016. This may be helpful to the undergraduate and post graduate Botany students to understand different types of taxonomic literature, especially Flora, Revision and Monograph.
Classification denotes the arrangement of a single plant or group of plants an distinct category following a system of nomenclature, and in accordance with a particular and well established plan.
It describes the basics of Plant classification, morphological, anatomical, palynological, embryological, chemical and cytological evidences of classification
Species delimitation - species limits and character evolutionRutger Vos
Lecture slides for the program orientation Evolutionary Biology at the Institute of Biology Leiden, the Netherlands. Thursday, September 7th, 2017.
Lecture notes are here: https://docs.google.com/document/d/e/2PACX-1vRIv5mKK1fjBby--u97emC7hrqXUbxFQZe63P1FpguuhHLG6xykbwXKeKXCUE5W-LSpakXYCI621xCK/pub
Plant Taxonomy with the passage of time deserves holistic approach in the domain of biology.Now, it becomes a synthetic science due to application of other branches of knowledge like Chemistry, Molecular biology etc.This slide is intended to UG & PG students of Botany.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
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This course is about different types of organisms and their taxonomical position . This discusses, how is science of identification, nomenclature and classification developed during the course of time. This course also covers all the essential topics like types of classification and systems of classification in a nut shell. All the information is authentic and will help to understand the subject very well in an easy and interesting way. The innovative approach to this topic is to explain the topics by pictorial diagrams and tables, which is a comparative account of all the respective and related topics. Please feel free to comment and give your suggestions.
CBCS 4TH SEM ,
CHARGING, STRUCTURE AND FUNCTION OF tRNA,
AMINOACYL RNA SYNTHETASE(ASR) PROOFREADING AND EDITING
https://www.youtube.com/watch?v=YzOVMWYLiCE
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
Francesca Gottschalk - How can education support child empowerment.pptxEduSkills OECD
Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
A Strategic Approach: GenAI in EducationPeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
CLASS 11 CBSE B.St Project AIDS TO TRADE - INSURANCE
Some aspects of plant taxonomy
1.
2.
3.
4. Plant Taxonomy
• Plant Taxonomy is the branch of science which
deals with the identification, nomenclature and
classification of plants.
• Plant Taxonomy is the branch of science which
deals with the identification, nomenclature and
classification of plants.
4
8. EpidermisEpidermis
• Shape, wall thickness, wall sculpturing and
inclusions in the epidermal cells.
• Papillate epidermal cells in Graminae
• Presence and distribution of silica bodies in
Cyperaceae
• Sclerification of the wall of epidermal cells in
some genera of Compositae
• Presence of very narrow epidermal cells in
Stylidiaceae
8
9. Nodal anatomyNodal anatomy
• According to Dickison (1975) correlations of
nodal anatomy with some other features
might help significantly in tracing the
phylogeny of angiosperms
• Philipson (1968) attempted to use nodal
anatomy as an aid to taxonomy
• Sinnott(1914) considered the trilacunar node
as primitive and unilacunar and multilacunar
nodes as advanced.
9
10. • According to Paliwal and Anand (1978) majority
of dicotyledons possess trilacunar nodes.
• Unilacunar nodes are found in Laurales,
caryphyllales, Ericales, Ebenales, Primulales,
Myrtales and a few Tubiflorae and Asteridae
members.
• Multilacunar nodes are found in Magnoliales,
Piperales, Trochodendrales, Umbellales and
Asterales.
10
Nodal anatomyNodal anatomy
11.
12. Cytology in relation to taxonomy or
Cytotaxonomy
Cytology in relation to taxonomy or
Cytotaxonomy
• The term karyotype is used for the phenotypic
appearance of the somatic chromosomes.
• The diagrammatic representation of karyotype is
termed as idiogram.
• The characteristics of the chromosomes, which
have proved to be of taxonomic value include
• Chromosome number
• Chromosome size
• Chromosome morphology
• Chromosome behavior during meiosis.
12
13. Chromosome number
• Homoploids ( Pinus and Quercus, n=12
chromosomes )
• Polyploids (different species of Aster have n=9
or n=18 or n=27 )
• Euploidy
• Aneuploidy ( different species of Brassica bear
n=6,7,8,9, or 10 )
13
14. Chromosome size
• 0.5 to 3 µ
• According to Stebbins (1938) the chromosome
size is characteristics of only certain groups
and families, and not related to phylogeny of
angiosperms.
14
16. Chromosome Behavior at MeiosisChromosome Behavior at Meiosis
• Degree of sterility and occurrence of
hybridization are determined by the behavior
of chromosomes during meiosis
• Abnormalities in meiosis, such as non-pairing,
crossing over, unequal interchanges or
translocations, bridge formation, lagging
chromosomes etc. have all proved to be
systematic value.
16
17. Systematic value of cytological studiesSystematic value of cytological studies
• Jackson (1971)
• Members of Cyperaceae and Juncaceae possess
chromosomes with diffuse or non-localized
centromere, and also show inverted meiosis. This
reflect a close association between these two families.
• Yucca had long been treated as a member of Liliaceae
because of superior ovary, and Agave of
Amaryllidaceae because of inferior ovary. Hutchinson
shifted both plants to Agavaceae because of the
presence of 25 small and 5 large chromosome in both
of them
17
18. • On the basis of cytological studies, Lewis (1951)
submerged the genus Godetia in Clarkia
( Onagraceae)
• Naik (1977) differentiated three species of
Chlorophytum of Liliaceae on the basis of
cytological data. According to him C.bharuchae
has 2n=16 while C.glaucum and C. glaucoides
have 2n=42. both the later species having differ
karyomorphology.
• Warburg(1938) studied taxonomy of Gerniales
on the basis of cytological studies.
18
Systematic value of cytological studiesSystematic value of cytological studies