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Draw T.S of young anther angiospermic. Label the different layers of the wall and write their functions.
Answers (1)
In a transverse section, a typical microsporangium appears near circular in outline. It is generally surrounded by four wall layers – the epidermis, endothecium, middle layers and the tapetum. The outer three wall layers perform the function of protection and help in dehiscence of anther to release the pollen.
The innermost wall layer is the tapetum. It nourishes the developing pollen grains. Cells of the tapetum possess dense cytoplasm and generally have more than one nucleus. A group of compactly arranged homogenous cells called the sporogenous tissue occupies the center of each microsporangium. Each cell of the sporogenous tissue is capable of giving rise to a microspore tetrad.
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