Endothecium

Endothecium

Endothecium is a type of tissue found in the walls of anthers and in moss capsules. This tissue is usually one to several layers thick, and is composed of cells that have walls of uneven thickness.In anthers, the endothecium is responsible for the tensions that lead to anther dehiscence, or splitting. It is the uneven thickness of the cells walls that cause this. The cells lose water, and the uneven thickness causes the thinner walls of the cells to stretch to a greater extent. This creates a tension that eventually leads to the anther being split along its line of weakness and releasing pollen grains to the atmosphere.


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  • Endothecium — En do*the ci*um, n. [NL. See {Endotheca}.] (Bot.) The inner lining of an anther cell. [1913 Webster] …   The Collaborative International Dictionary of English

  • endothecium — [en΄dō thē′shē əm, en΄dō thē′sēəm] n. pl. endothecia [en΄dō thē′shēə, en΄dō thē′sēə] [ ENDO + ModL thecium, a fine enclosing structure < Gr thēkion, a small case, dim. of thēkē: see THECA] an inner layer, as the inner wall of a pollen grain or …   English World dictionary

  • endothecium — noun (plural endothecia) Etymology: New Latin Date: 1832 the inner lining of a mature anther …   New Collegiate Dictionary

  • endothecium — endothecial /en doh thee shee euhl, sheuhl, see euhl/, adj. /en doh thee shee euhm, see euhm/, n., pl. endothecia / shee euh, see euh/. Bot. 1. the lining of the cavity of an anther. 2. (in mosses) the central mass of cells in the rudimentary… …   Universalium

  • endothecium — noun The tissue found in the walls of anthers, and in moss capsules …   Wiktionary

  • endothecium — en·do·the·ci·um …   English syllables

  • endothecium — en•do•the•ci•um [[t]ˌɛn doʊˈθi ʃi əm, si əm[/t]] n. pl. ci•a [[t] ʃi ə, si ə[/t]] 1) bot the lining of the cavity of an anther in a flower 2) pln the inner lining of the capsule in mosses • Etymology: 1825–35; endo + NL thecium < Gk thḗkion;… …   From formal English to slang

  • endothecium — /ɛndoʊˈθiʃiəm/ (say endoh theesheeuhm), / siəm/ (say seeuhm) noun (plural endothecia /ɛndoʊˈθiʃiə/ (say endoh theesheeuh), / siə/ (say seeuh)) 1. the sub epidermal cell layer of an anther which causes it to open when mature, often having special… …  

  • endothecium — …   Useful english dictionary

  • Dehiscence (botany) — Dehiscence of the follicular fruit of milkweed (Asclepias syriaca) revealing seeds within. Dehiscence is the opening, at maturity, in a pre defined way, of a plant structure, such as a fruit, anther, or sporangium, to release its contents.… …   Wikipedia

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