Introduction to Plant Reproduction, Modes of Reproduction, Significance of Reproduction, Asexual Reproduction, Sexual Reproduction, Contributions of Scientists.
Fungi are eukaryotic, spore bearing, achlorophyllous, heterotrophic organisms that generally reproduce sexually and asexually and whose filamentous, branched somatic structures are typically surrounded by cell walls containing chitin or cellulose or both with many organic molecules and exhibiting absorptive nutrition.Fungi frequently reproduce by the formation of spores. A spore is a survival or dispersal unit, consisting of one or a few cells, that is capable of germinating to produce a new hypha. Unlike plant seeds, fungal spores lack an embryo, but contain food reserves needed for germination. Many fungi produce more than one type of spore as part of their life cycles. Fungal spores may be formed via an asexual process involving only mitosis (mitospores), or via a sexual process involving meiosis (meiospores). Sexual and asexual reproduction may require different sets of conditions (e. g., nutrients, temperature, light, moisture).
Fungi are eukaryotic, spore bearing, achlorophyllous, heterotrophic organisms that generally reproduce sexually and asexually and whose filamentous, branched somatic structures are typically surrounded by cell walls containing chitin or cellulose or both with many organic molecules and exhibiting absorptive nutrition.Fungi frequently reproduce by the formation of spores. A spore is a survival or dispersal unit, consisting of one or a few cells, that is capable of germinating to produce a new hypha. Unlike plant seeds, fungal spores lack an embryo, but contain food reserves needed for germination. Many fungi produce more than one type of spore as part of their life cycles. Fungal spores may be formed via an asexual process involving only mitosis (mitospores), or via a sexual process involving meiosis (meiospores). Sexual and asexual reproduction may require different sets of conditions (e. g., nutrients, temperature, light, moisture).
Pollen pistil interaction
Types of Incompatibility in plants
Methods to overcome Incompatibility
Prepared by
Dr. T. Annie Sheron
Assistant Professor of Botany
DEPARTMENT OF BOTANY
KAKATIYA GOVERNMENT COLLEGE, HANAMKONDA
FAQs on Sexual Reproduction in Flowering PlantsPunya M
Hello everyone,
welcome my dear students....
i know after going through the chapter you all must be asking so many questions to yourself ... so here is a small set of questions to help you out....for more details you can login to my youtube channel PM Biology(PMB).
From the forgoing presentation, it can be concluded that breeding characters viz., flowering period, inflorescence, time of flower opening, time of anther dehiscence, time of stigma receptivity, pollinating agent ,time of visitor of pollinating agent and fruit set (%) in tropical species are required to be studied as they are vital for any improvement and eco-environmental planning purposes. It also throws light on how species adopts itself along with the phenomenon of speciation and reproductive isolation. From these characters we can introduce new variety which is essential for further evaluation and also the identification of the interactions between biological factors, such as animal, plant species, and non-biological factors, like temperature, RH, rain and wind, helps us to elaborate management and conservation plans for the ecosystems of the planet, which have become more and more necessary due to highly increased rate of deterioration of different ecosystems during the last few decades.
Pollen pistil interaction
Types of Incompatibility in plants
Methods to overcome Incompatibility
Prepared by
Dr. T. Annie Sheron
Assistant Professor of Botany
DEPARTMENT OF BOTANY
KAKATIYA GOVERNMENT COLLEGE, HANAMKONDA
FAQs on Sexual Reproduction in Flowering PlantsPunya M
Hello everyone,
welcome my dear students....
i know after going through the chapter you all must be asking so many questions to yourself ... so here is a small set of questions to help you out....for more details you can login to my youtube channel PM Biology(PMB).
From the forgoing presentation, it can be concluded that breeding characters viz., flowering period, inflorescence, time of flower opening, time of anther dehiscence, time of stigma receptivity, pollinating agent ,time of visitor of pollinating agent and fruit set (%) in tropical species are required to be studied as they are vital for any improvement and eco-environmental planning purposes. It also throws light on how species adopts itself along with the phenomenon of speciation and reproductive isolation. From these characters we can introduce new variety which is essential for further evaluation and also the identification of the interactions between biological factors, such as animal, plant species, and non-biological factors, like temperature, RH, rain and wind, helps us to elaborate management and conservation plans for the ecosystems of the planet, which have become more and more necessary due to highly increased rate of deterioration of different ecosystems during the last few decades.
Exploring Asexual Reproduction in Plants: Mechanisms, Benefits, and Examples ...The Lifesciences Magazine
Asexual reproduction in plants, also known as vegetative propagation, is a fascinating biological process wherein new individuals are produced from a single parent plant without the involvement of gametes.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
The Art Pastor's Guide to Sabbath | Steve ThomasonSteve Thomason
What is the purpose of the Sabbath Law in the Torah. It is interesting to compare how the context of the law shifts from Exodus to Deuteronomy. Who gets to rest, and why?
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
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.
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
1. Notebook: Botany 3rd Sem
Created: 30-08-2020 07:59 Updated: 30-08-2020 10:22
Author: Ankit Srivastava
URL: https://en.wikipedia.org/wiki/Plant_reproduction
Unit 5 Introduction to Plant Reproduction
Modes of reproduction in plants: vegetative options - natural and artificial; introduction and Significance of
sexual reproduction. History (contributions of G.B. Amici, W. Hofmeister, E. Strasburger, S.G. Nawaschin, P.
Maheshwari, B.M. Johri, W.A. Jensen, J. Heslop-Harrison, and scope, Significance of Reproductive Biology
studies.
Defini on of Reproduc on in Plants
Plant reproduc on is the produc on of new offspring in plants, which can be accomplished by
sexual or asexual reproduc on. Sexual reproduc on produces offspring by the fusion of gametes,
resul ng in offspring gene cally different from the parent or parents. Asexual reproduc on
produces new individuals without the fusion of gametes, gene cally iden cal to the parent
plants and each other, except when muta ons occur.
Modes of Reproduc on in Plants
Plants reproduce by two methods.
The method in which fusion of gametes occurs is called sexual reproduc on and the mode of
reproduc on in which there occurs no fusion of gametes are called asexual reproduc on. These
methods are further classified into different types.
The offspring produced from asexual reproduc on is iden cal to its parent as there occurred no
fusion of gamete. Some mes the off springs varies when there occurs muta on.
In sexual reproduc on, there occurs forma on of seeds, which is by fer liza on of the embryos.
Apomixis is a kind of asexual reproduc on in which there occurs forma on of seeds but this seed
is not formed by fer liza on. The pollen contributes no gene c material here.
Vegeta ve Reproduc on
3. Runners
Also known as stolons, runners are modified stems that, unlike rhizomes, grow from exis ng stems just
below the soil surface. As they are propagated, the buds on the modified stems produce roots and stems.
Those buds are more separated than the ones found on the rhizome.[19]
Examples of plants that use runners are strawberries and currants.
Bulbs
Bulbs are inflated parts of the stem within which lie the central shoots of new plants. They are
typically underground and are surrounded by plump and layered leaves that provide nutrients to
the new plant.[20]
Examples of plants that use bulbs are shallots, lilies and tulips.
4. Tubers
Tubers develop from either the stem or the root. Stem tubers grow from rhizomes or runners
that swell from storing nutrients while root tubers propagate from roots that are modified to
store nutrients and get too large and produce a new plant.[19]
Examples of stem tubers are potatoes and yams and examples of root tubers are sweet potatoes
and dahlias.
Suckers
Also known as root sprouts, suckers are plant stems that arise from buds on the base of parent
plants stems or on roots.[22]
Examples of plants that use suckers are apple, elm, and banana trees.
5. Introduc on and Significance of Sexual Reproduc on
30 August 2020
09:12
Sexual reproduc on involves two fundamental processes: meiosis, which rearranges the genes and
reduces the number of chromosomes, and fer liza on, which restores the chromosome to a complete
diploid number. In between these two processes, different types of plants and algae vary, but many of
them, including all land plants, undergo alterna on of genera ons, with two different mul cellularis
haploid, containing a single set of chromosomes in each cell. The gametophyte produces male or female
gametes (or both), by a process of cell division, called mitosis. In vascular plants with separate
gametophytes, female gametophytes are known as mega gametophytes (mega=large, they produce the
large egg cells) and the male gametophytes are called micro gametophytes (micro=small, they produce
the small sperm cells).
The fusion of male and female gametes (fer liza on) produces a diploid zygote, which develops by mito c
cell divisions into a mul cellular sporophyte.
The mature sporophyte produces spores by meiosis, some mes referred to as "reduc on division"
because the chromosome pairs are separated once again to form single sets.
In mosses and liverworts, the gametophyte is rela vely large, and the sporophyte is a much smaller
structure that is never separated from the gametophyte. In ferns, gymnosperms, and flowering plants
(angiosperms), the gametophytes are rela vely small and the sporophyte is much larger. In gymnosperms
and flowering plants the megagametophyte is contained within the ovule (that may develop into a seed)
and the micro gametophyte is contained within a pollen grain. It is known as fer liza on.
6. Contribu ons of Major Scien sts
Giovanni Ba sta Amici
Wilhelm Hofmeister
Eduard Strasburger
Sergei Navashin
7. Brij Mohan Johri
Significance of Reproduc ve Biology
Knowledge on reproduc ve mechanisms of plants can help to assess the adap ve significance
and homology of descrip ve characters used in plant systema cs. Studying reproduc ve biology
can also give insight into the delimita on and classifica on of species and infraspecies
Plant reproduc ve biology is the study of the mechanisms and processes of sexual and asexual
reproduc on in plants. It may encompass the study of pollina on mechanisms, gene flow,
gene c varia on, and propagule dispersal between and within popula ons.
