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

Identical chromatids bound, What is the structure that maintains identical ...

What is the structure that maintains identical chromatids bound? Ans) The structure that handles identical chromatids bound is the centromere.

Define hexokinase, Hexokinase, that catalyzes the first irreversible step o...

Hexokinase, that catalyzes the first irreversible step of glycolysis, is inhibited by glucose 6-phosphate.   Thus  when  PFK  is  inhibited and  fructose  6-phosphate builds  up an

Why haploid cell attempted to perform meiosis, What problem would most like...

What problem would most likely to occur if a haploid cell attempted to perform meiosis? a.The cell could not replicate its DNA prior to meiosis. b.The cell could not pair hom

What do you understand by open circulatory system, What do you understand b...

What do you understand by Open circulatory system? A circulatory system in which circulating fluid (blood) flows into vessels or tubes not connected to each other by small capi

Explain food borne toxic infections, Q. Explain Food borne toxic infections...

Q. Explain Food borne toxic infections? Ans. The food borne toxic infections, you may recall reading earlier, are caused by the ingestion of a large numbers of ent

Explain puewabilitation programme in details, Explain puewabilitation progr...

Explain puewabilitation programme in details ? Education, counselling, and behavioural interventions are important elements of cardiac rehabilitation. In this guideline, "educ

Reproduction, write about asexual reproduction in mucor?

write about asexual reproduction in mucor?

Secondary and the primary constrictions of a chromosome, Q. What are the se...

Q. What are the secondary and the primary constrictions of a chromosome? And what is the other name given to the secondary constriction? Primary constriction is the narrower re

Realization of p-d polarity of limb, Realization of P-D Polarity of Limb ...

Realization of P-D Polarity of Limb Realization of P-D polarity of limb expressed in a specified proximo-distal sequence of differentiation of limb pans is controlled through

Explain the sex composition of the population, Explain the Sex Composition ...

Explain the Sex Composition of the Population? Sex composition of human population is one of the basic demographic characteristics, which is extremely vital for any meaningful

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