Anther dehiscence and pollen transfer, Biology

Assignment Help:

Anther Dehiscence and Pollen Transfer

Anther Dehiscence

Anther dehiscence simply means the release of pollen grains from dry and mature anthers. It involves the rupturing of anther wall due to the mechanical pressure developed by the fibrous thickenings of endothecial cells along the stomium (the area where mechanical layer does not differentiate). If endothecium is lacking, the mechanical role is passed on to epidermal cells. In most of the angiosperms the stomium is a narrow strip along the entire length of the anther lobe. It may, however, also be restricted to a lid or valve (Berberidaceae) or pores (Solanum, Cassia, Polygala).

Pollen Transfer

The transfer of pollen can be autogamous (self-pollination) in which the pollen grains of an anther reach the stigma of the same flower. In cross-pollination, - the pollen of one plant reach the pistil of some other plant of the same species. If the pollination occurs between two flowers of the same plant it is termed geitonogamy and, if it is between two flowers on different plants it is xenogamy.


Related Discussions:- Anther dehiscence and pollen transfer

Concept of punctuated equilibrium, A species of trilobite was found in the ...

A species of trilobite was found in the fossil record. At its first appearance, it is similar to an ancestor species but differs from the ancestor in several key characteristics. I

Explain the term - migraine, Explain the term - Migraine Perhaps the mo...

Explain the term - Migraine Perhaps the most common neurological disorder, migraine afflicts some 5% to 20% of the population at some time in their lives. The World Federation

Speciation, SPECIATION - Origin of new species: An isolated popula...

SPECIATION - Origin of new species: An isolated population of a species independently develops different types of mutations. The later accumulate in its gene pool. Afte

Explain the functionality of hot air oven, Explain the Functionality of Hot...

Explain the Functionality of Hot Air Oven? Hot air oven sterilizes the object by hot dry air. It kills the microorganisms by oxidizing cellular constituents. Dry Heat is less e

Male reproductive system of frog, Male reproductive system of frog: i) ...

Male reproductive system of frog: i) Testis : a) There are a pair of testis which are attached to the kidneys. b) They are oval and yellow in colour. c) Inside the testis th

What is hazard identification, What is Hazard Identification Hazard  I...

What is Hazard Identification Hazard  Identification :  The  identification  of  known  or potential  health effects associated with  a  certain  agent.

Human body, what are the importance in studying animal tissues?

what are the importance in studying animal tissues?

What are the main risk factors for hypertension, Q. What are the main risk ...

Q. What are the main risk factors for hypertension? The major risks factors for hypertension are tobacco smoking, stress, obesity, sedentary lifestyle and alcoholism.

Explain about the essential fat in humans, Explain about the essential fat ...

Explain about the essential fat in Humans? For the body to function normally, certain amount of body fat is required. This is called essential fat. For women, average amount of

Explain the classification of malignant tumors, Explain the Classification ...

Explain the Classification of Malignant Tumors Malignant tumors can be classified as: Carcinomas: These tumors arise from the epithelial lining (the squamous cells) e.g. ski

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd