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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 Atractophora hypnoides ： ウィキペディア英語版 Atractophora hypnoides ''Atractophora hypnoides'' P.L. Crouan & H.M.Crouan is a rare red alga (Rhodophyta) found in the British Isles, France and some Atlantic Islands and is the only species of the genus found in the British Isles. It is attached to the rock or other algae by a small basal disc and is much branched with downgrowing filaments which enclose the main branch or axis forming a cortex. Short filaments of limited growth radiate in whorls from the axis and frequently convert into hairs. The spreading filaments grow irregularly in a diffuse manner. Microscope examination is required for identification. ==Botanical description== ''Atractophora hypnoides'' is the gametangial, that is the sexual reproductive, phase of this alga, tetransporangia are unknown. The gametangial thallus is erect, red and grows to a length of about 10cms. In the life cycle the adult, gametangial phase of the plant, produces spermatangia in clusters and carposporophytes which produce carpospores. On release these germinate and develop into the gametangial phase. No tetrasporangial phase is known. (Dixon and Irvine 1977 p. 148)〔Dixon, P.S. and Irvine, L.M. 1977. ''Seaweeds of the British Isles. Volume 1. Rhodophyta. Part 1. Introduction, Nemalionales, Gigartinales.'' British Museum (Natural History), London. ISBN 0-565-00781-5〕 However tetraspores released from ''Rhododiscus pulcherrimus'' when cultured germinated to form spermitangial and carpogonial branches. The vegetative and reproductive development corresponded closely with that described for ''Atractophora hypnoides.''〔Maggs, C.A., Guiry, M.D. and Irvine, L.M. 1983. The life history of an isolate of ''Rhodiscus pulcerimus'' (Naccariaceae; Rhodophyta) from Ireland.Abstract of papers read at the winter meeting at the University of Newcastle upon Tyne. ''Br. phycol. J.'' 18: 206〕 There are many other similar finely branched algae: ''Audouinella'', ''Antithamnion'', ''Dasya'', ''Spyridia'' and others. 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「Atractophora hypnoides」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.