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A theca (plural thecae) refers to any case, covering, or sheath.
Additional recommended knowledge
Each anther is bilocular, i.e. it consists of two thecae. Each theca contains two pollen sacs (the male sporangium with the microspores).
The tissue between the locules and the cells is called the connective and the parenchyma. Both pollen sacs are separated by the stomium. When the anther is dehiscing, it opens at the stomium.
The outer cells of the theca form the epidermis. Below the epidermis, the somatic cells form the tapetum. These support the development of microspores into mature pollen grains. However, little is known about the underlying genetic mechanisms, which play a role in male sporo- and gametogenesis.
The thecal arrangement of a typical stamen can be as follows :
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Theca". A list of authors is available in Wikipedia.|