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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Conceptacle ： ウィキペディア英語版 Conceptacle Conceptacles are specialised cavities of marine and freshwater algae that contain the reproductive organs. They are situated in the receptacle and open by a small ostiole.〔Boney, A.D. (1969). ''A Biology of Marine Algae''. Hutchinson Educational Ltd, London〕 Conceptacles are present in Corallinaceae,〔Irvine, L.M. and Chamberlain, Y.M. (1994). ''Seaweeds of the British Isles''. Volume 1, Part 2B. Natural History Museum, London. ISBN 0-11-310016-7〕 and Hildenbrandiales, as well as the brown Fucales. In the Fucales there is no haploid phase in the reproductive cycle and therefore no alternation of generations.〔Fritsch, F.E. (1945). ''The Structure and Reproduction of the Algae''. Vol 2. Cambridge University Press, Cambridge〕 The thallus is a sporophyte.〔Smith, G.M. (1938). ''Cryptogamic Botany. Algae and Fungi''. Second edition, Volume ''1'', McGraw-Hill Bok Company, Inc.〕 The diploid plants produce male (antheridia) and female (oogonia) gametangia by meiosis. The gametes are released into the sea, after fusion the zygote settles and begins growth.〔Flecher, R.L. (1987). ''Seaweeds of the British Isles''. Volume 3, Part 1. British Museum (Natural History), London. ISBN 0-565-00992-3〕 Two taxa, the corallines and Hildenbrandiaceae, bear conceptacles, although the striking difference between their formation indicates that the conceptacles are not homologous. Similar structures also exist: ''cryptostomata'' are similar to conceptacles but differ having only hairs and are sterile.〔 ''Caecostomata'', are found only in ''Fucus distichus'', in these the ostiole becomes blocked during development.〔 == Morphology == Conceptacles can measure from 40–150 μm in diameter in some Hildenbrandiales. Some conceptacles are pits within the thallus, whereas others form raised domes protruding above it. Conceptacles open to the environment via one or many pores, depending on the species and the type of conceptacle.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Conceptacle」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.