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

Reproductive systems, compare the lengths and paths of the uterine tubes (o...

compare the lengths and paths of the uterine tubes (oviducts) of the cat and the human

Molluscus - hormones in growth and reproduction, Molluscus - Hormones in Gr...

Molluscus - Hormones in Growth and Reproduction We know quite well about the endocrine mechanism of growth and reproduction in the freshwater snail Lymnaea stagnalis. This is

Implementation of nursing care plan, Implementation The planned goals ...

Implementation The planned goals and strategies are translated into nursing intervention by means of the nursing care plan. It is essential that the client and family par

Explain coarctation of aorta, Explain Coarctation of Aorta ? Coarctati...

Explain Coarctation of Aorta ? Coarctation of aorta may be isolated or it may have other co-existing cardiac and vascular lesions. In critically ill neonates with coarctation,

Show the factors affecting osseointegration, Q. Show the Factors affecting ...

Q. Show the Factors affecting osseointegration? The success or failure of osseointegration is dependent on the following factors. a) Occlusal load b) Biocompatibility of

Isolating mechanism, In this section we are to discuss the means by which p...

In this section we are to discuss the means by which populations get separated or isolated from each other, first gain the status of'Sub-species and finally evolve mechanisms which

How does plasma membrane regulate, How does a plasma membrane regulate move...

How does a plasma membrane regulate movement of molecules into and out of a cell?

Spermatogenesis, Spermatogenesis In multicellular organisms the repro...

Spermatogenesis In multicellular organisms the reproductive process commences with the production of gametes. The gametes are the sex cells that develop inside the gonads, th

What is molecular formula of the compound, A solid compound was found to co...

A solid compound was found to contain 42.11% C, 51.46%O and 6.43% H by weight. The molecular weight of the compound was 341. What is the molecular formula of the compound?

What do you understand by the term accommodation, (a) What do you understan...

(a) What do you understand by the term 'accommodation'? (b) What part does the lens play in this process?   a) Accommodation is the way the eye can focus either

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