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

How are the concepts of dna, How are the concepts of DNA, gene, proteins an...

How are the concepts of DNA, gene, proteins and characteristics of living beings related? Characteristics of organisms depend on chemical reactions that happen in them. These r

What is endocytosis , Endocytosis is the uptake of extracellular macr...

Endocytosis is the uptake of extracellular macromolecules   across the plasma membrane into the cell. The objects to be ingested is progressively  enclosed by a  small  portion  of

Low protein products, Foods with moderate amounts of protein can be eaten i...

Foods with moderate amounts of protein can be eaten in limited amounts. These foods include grains, bread, pasta, rice, potatoes, corn, and peas. Foods with little or no protein ar

Properties of isozymes, Properties of Isozymes Isozymes differ from  ...

Properties of Isozymes Isozymes differ from  each other not only in  the amino acid composition, they also have different electrophoretic property, thermolability, immunologi

What are the main intraspecific ecological interactions, Q. What are the ma...

Q. What are the main intraspecific ecological interactions? The major harmonious intraspecific ecological interactions are societies and colonies. The major inharmonious intras

Uncomplicated q wave mi-coronary artery bypass surgery, Uncomplicated Q ...

Uncomplicated Q Wave MI :  CABG has very little place in cases of uncomplicated Q wave myocardial infarction. However the place of urgent surgery has to be compared to thrombo

What do you mean by hemodialysis, Q. What do you mean by hemodialysis? ...

Q. What do you mean by hemodialysis? Hemodialysis is the artificial blood filtration made by specific machines in alternative of the kidneys. Hemodialysis may be necessary in p

Explain the treatment of vitamin a deficiency, Explain the Treatment of vit...

Explain the Treatment of vitamin A deficiency? All forms of vitamin A deficiency are treated with a massive oral dose of vitamin A in oil (200,000 IU), immediately after diagno

Name a few foods which are best blanched, Name a few foods which are best b...

Name a few foods which are best blanched? Yes, green beans, carrots, okra, turnip and cabbage should always be blanched. On the other hand, blanching is not needed for onions,

Enzymes, what happen to a denatured enzyme regarding its functionality? how...

what happen to a denatured enzyme regarding its functionality? how can that result be explained with the help of the lock and key model?

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