Tapetum - anther wall layers, Biology

Tapetum - Anther Wall Layers

Tapetum is the innermost and most important layer of the anther wall. It is generally composed of a single layer of cells. These cells completely surround the sporogenous tissue, and they attain maximum development when the sporogenous tissue is at the tetrad stage. The tapetum is of dual origin in most of the angiosperms; the cells of the outer side originate from the derivatives of the PPCs, while those of the inner portion originate from the cells of the connective. Usually tapetal cells of different origin also appear different in size and structure. Tapetum of dual origin is also known as dimorphic tapetum. In Alectra thomsoni, the tapetal cells on the outer side are much smaller than those on the inner side.

1278_Tapetum.png

Figure: (a) Diagrammatic sketch of transverse section of an anther showing the position of tapetum. (b) A few cells enlarged to show the dense cytoplasm and multinucleate condition of the tapetal cells.

Posted Date: 1/23/2013 12:33:51 AM | Location : United States







Related Discussions:- Tapetum - anther wall layers, Assignment Help, Ask Question on Tapetum - anther wall layers, Get Answer, Expert's Help, Tapetum - anther wall layers Discussions

Write discussion on Tapetum - anther wall layers
Your posts are moderated
Related Questions
State the Lantern Test  The patient names colours displayed in the lantern and the mistakes are analyzed. This is not the best method of testing because it depends on the natu


Q Which is the chordate class considered an evidence of the transition of the vertebrates from the aquatic to the dry land environment? The amphibians are totally aquatic in th

What is capillarity? How this phenomenon is chemically explained? What is the relevance of capillarity for water transport in plants? Capillarity is the phenomenon by which

What are the factors that for influencing photosynthesis also interfere with the gross primary productivity? Mostly water and light, but also mineral salts, temperature and car

Which of the following is true for the following spanning membrane proteins? A. The mAChR (muscarinic Acetylcholine Receptor) is a spanning membrane protein located in the memb

Explain about the Niacin (nicotinic acid) deficiency? Niacin (nicotinic acid) deficiency classically results in pellagva, which is a chronic wasting disease associated with a c

Explain the Copper Toxicity in Human? Acute copper toxicity in humans is rare and occurs due to inadvertent consumption of copper salts. Symptoms include vomiting, diarrhoea, h

Define Precautions for Check the Presence of Rhodamine B? 1. Sample should be clean and dry. 2. Dispose off the paraffin oil carefully, so that it does not contaminate food/

Q. Explain Spoilage of Fruits and Vegetables? Ans. Fruits and vegetables are an integral part of daily diets of man all over the world. The spoilage of fruits and vegetabl