Tapetum - anther wall layers, Biology

Assignment Help:

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.


Related Discussions:- Tapetum - anther wall layers

Explain the central dogma of molecular biology, Which one of the following ...

Which one of the following does not follow the central dogma of molecular biology? 1. Pea 2. Mucor 3. Chlamydomonas 4. HIV HIV is the central dogma of molecular bi

When a fatty acid reacts with thew glycerol, When a fatty acid reacts with ...

When a fatty acid reacts with glycerol, the result is- Select one: a. Formation of an amide b. Formation of an ester c. Formation of hydrocarbon d. Formation of a th

What is salmonella typhosn, What is salmonella typhosn Typhoid is  an e...

What is salmonella typhosn Typhoid is  an enteric fever, which relates  to acute infection of  short duration. It is   caused by bacteria called Salmonella typhosn about which

Why is meiosis important for the maintenance, Why is meiosis important for ...

Why is meiosis important for the maintenance of the normal quantity of chromosomes of a species with sexual reproduction? A reduction to a half of the maximum normal quantity o

Roots, secondary growth in roots

secondary growth in roots

Will sedantary lifestyle increased risk for cad, Q. Will Sedantary Lifestyl...

Q. Will Sedantary Lifestyle increased risk for CAD? A sedantary life style is associated with increased risk for CAD. Sedentary persons have almost double the risk for CAD deat

Define factors affecting microbial survival and growth, Define Factors Affe...

Define Factors Affecting Microbial Survival and Growth? Microbes commonly present on the food, we have seen, include members of the genera Bacillus, Clostridium, Pseudomonas, S

Solid waste management, Solid waste management, Other Management The solid...

Solid waste management, Other Management The solid wastes from a summer camp with 100 children and a staff of 25 are to be collected once per week. If bottles and cans (representi

Ice age, Ice age is an interval of geologic time between 2 million and 10,...

Ice age is an interval of geologic time between 2 million and 10,000 years ago during that period the northern hemisphere experienced several episodes of continental glacial advan

What are the abnormalities of gaze, What are the Abnormalities of gaze ...

What are the Abnormalities of gaze Normal gaze is when visual axes both eyes are parallel in primary gaze. when visual axes are not parallel in primary gaze, it is abnormal ga

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