翻訳と辞書 Words near each other ・ Haplolabida viettei ・ Haplolambda ・ Haplolepis ・ Haplolobus ・ Haplolobus (plant) ・ Haplolobus beccarii ・ Haplolobus bintuluensis ・ Haplolobus inaequifolius ・ Haplolobus kapitensis ・ Haplolobus leenhoutsii ・ Haplolobus sarawakanus ・ Haplology ・ Haplomacrourus nudirostris ・ Haplomastodon ・ Haplomitriales ・ Haplomitriopsida ・ Haplomitrium ・ Haplomitrium andinum ・ Haplomitrium blumei ・ Haplomitrium dentatum ・ Haplomitrium gibbsiae ・ Haplomitrium grollei ・ Haplomitrium hookeri ・ Haplomitrium kashyapii ・ Haplomitrium minutum ・ Haplomitrium mnioides ・ Haplomyces ・ Haplonerita ・ Haplonerita maculata ・ Haplonerita simplex Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Haplomitriopsida ： ウィキペディア英語版 Haplomitriopsida Haplomitriopsida is a newly recognized class of liverworts comprising fifteen species in three genera. Recent cladistic analyses of nuclear, mitochondrial, and plastid gene sequences place this monophyletic group as the basal sister group to all other liverworts. The group thus provides a unique insight into the early evolution of liverworts in particular and of land plants in general. == Description == Plants of ''Treubia'' grow as a prostrate leafy thallus. The bifid leaves extend like wings on either side of the midrib, or may be folded upwards and pressed close together, giving the plants a ruffled appearance. By contrast, ''Haplomitrium'' grows as a subterranean rhizome with erect leafy stems. The thin, rounded leaves are arranged around the upright stems, giving the appearance of a soft moss. The species ''Haplomitrium ovalifolium'' of Australia often has bifid leaves that are asymmetrical, somewhat like those in ''Treubia''. ''Haplomitrium'' has a number of unique characters that distinguish it from other liverworts, such as lacking rhizoids. The vegetative stems possess a central water-conducting strand with large perforations derived from plasmodesmata. This central strand is surrounded by a cylinder of cells that conduct food throughout the plant. Such an arrangement is evocative of the xylem and phloem found in vascular plants. Although some thalloid liverwort species in the Pallaviciniaceae also possess a central conducting strand, ''Haplomitrium'' differs in having a food-conducting layer and in producing no callose. ''Treubia'' also has features that differ from those found in other bryophytes, such as the differentiation of five identifiable zones in the stem midrib. Unlike other leafy species, the oil bodies in its cells are restricted to certain clusters of cells, as they are in the Marchantiopsida. These oil body clusters appear as dark spots in the leaves when the plant is held up to the light. 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「Haplomitriopsida」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.