Theca: Facts, Discussion Forum, and Encyclopedia Article

Theca

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	Theca
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	Topics Theca Topic Home A theca (plural thecae) refers to any case, covering, or sheath. In botanyBotany Botany is the scientific study of plantlife.... , the theca of an angiosperm is half of the anther. An anther and its filament form together a typical (or filantherous) stamenStamen The stamen is the male organ of a flower.... , part of the male floralFlower A flower,rflorem<flos), also known as a bloom or blossom, is the reproductive structure found i... organ. Each anther is bilocular, i.e. it consists of two thecae. Each theca contains two pollenPollen Pollen, sometimes incorrectly called flower sperm, is a fine to coarse powder consisting of *microgametophytes* ... sacs (the male sporangiumSporangium A sporangium is a plant or fungal structure producing and containing spores.... with the microspores). The tissue between the locules and the cells is called the connectiveConnective Connective may be referring to:* * Logical connective ... and the parenchymaParenchyma Overview In animals The *parenchyma* are the functional parts of an organ in the body.... . 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 epidermisEpidermis (botany) The epidermis is the outer single-layered group of cells covering a plant, especially the leaf and young tissues of a vascul... . Below the epidermis, the somaticSomatic The term somatic refers to the body, as distinct from some other entity, such as the mind.... cells form the tapetum. These support the development of microsporeMicrospore In biology, a microspore is a small spore as contrasted to the larger megaspore.... s 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 : divergent : both thecae in line, and forming an acute angle with the filament transverse (or explanate) : both thecae exactly in line, at right angles with the filament oblique: the thecae fixed to each other in an oblique way parallel : the thecae fixed to each other in a parallel way In biologyBiology Biology is the branch of science dealing with the study of life.... , the theca of follicleTheca of follicle The theca folliculi comprise a layer of the ovarian follicles.... can also refer to the site of androgenAndrogen Androgen is the generic term for any natural or synthetic compound, usually a steroid hormone, that stimulates or controls t... production in females.