“Bryophyta”的概念、定义、翻译、参考文献-科学参考

Bryophyta

Biology

A phylum containing some 15 000 known species of simple plants possessing no vascular tissue and rudimentary rootlike organs (rhizoids). They grow in a variety of damp habitats, from fresh water to rock surfaces. Some use other plants for support. Mosses show a marked alternation of generations between gamete-bearing forms (gametophytes) and spore-bearing forms (sporophytes): they possess erect or prostrate leafy stems (the gametophyte generation, which is haploid); these give rise to leafless stalks bearing capsules (the sporophyte generation, which is diploid), the latter being dependent on the former for water and nutrients. Spores formed in the capsules are released and grow to produce new plants.
Formerly, this phylum also included the liverworts and hornworts, now regarded as separate phyla (see hepatophyta; anthocerophyta) and the mosses were classified as a class (Musci) of the Bryophyta. The term ‘bryophytes’ may still be used, erroneously, to refer to members of all three phyla.
http://bryophytes.plant.siu.edu/ A resource devoted to mosses, liverworts, and hornworts from Southern Illinois University Carbondale

Geology and Earth Sciences

A division of plants, which includes only the mosses, with approximately 10 000 extant species. In earlier classifications the division also included the hornworts and liverworts, but that grouping is now thought to be paraphyletic. Although bryophytes lack differentiated water-conducting vessels and rely largely or entirely on water absorbed from rain falling on the plants or from a moist atmosphere, they may have simple water-conducting cells in some larger species. They lack true roots, but possess root-like rhizoids which anchor them to a substrate and which can absorb water and minerals. The plants show an alternation of generations, with a green vegetative gametophyte (the familiar plant) and a sporophyte which typically takes the form of a (usually stalked) capsule and which is partially or wholly parasitic on the gametophyte. Bryophytes are found world-wide in a range of habitats. The earliest fossil moss is Musites polytrichaceus from the Upper Carboniferous of France. There is no evidence to link bryophytes with either the green algae (Chlorophyta) or the more advanced pteridophytes.

单词	Bryophyta
释义	Bryophyta Biology A phylum containing some 15 000 known species of simple plants possessing no vascular tissue and rudimentary rootlike organs (rhizoids). They grow in a variety of damp habitats, from fresh water to rock surfaces. Some use other plants for support. Mosses show a marked alternation of generations between gamete-bearing forms (gametophytes) and spore-bearing forms (sporophytes): they possess erect or prostrate leafy stems (the gametophyte generation, which is haploid); these give rise to leafless stalks bearing capsules (the sporophyte generation, which is diploid), the latter being dependent on the former for water and nutrients. Spores formed in the capsules are released and grow to produce new plants. Formerly, this phylum also included the liverworts and hornworts, now regarded as separate phyla (see hepatophyta; anthocerophyta) and the mosses were classified as a class (Musci) of the Bryophyta. The term ‘bryophytes’ may still be used, erroneously, to refer to members of all three phyla. http://bryophytes.plant.siu.edu/ A resource devoted to mosses, liverworts, and hornworts from Southern Illinois University Carbondale Geology and Earth Sciences A division of plants, which includes only the mosses, with approximately 10 000 extant species. In earlier classifications the division also included the hornworts and liverworts, but that grouping is now thought to be paraphyletic. Although bryophytes lack differentiated water-conducting vessels and rely largely or entirely on water absorbed from rain falling on the plants or from a moist atmosphere, they may have simple water-conducting cells in some larger species. They lack true roots, but possess root-like rhizoids which anchor them to a substrate and which can absorb water and minerals. The plants show an alternation of generations, with a green vegetative gametophyte (the familiar plant) and a sporophyte which typically takes the form of a (usually stalked) capsule and which is partially or wholly parasitic on the gametophyte. Bryophytes are found world-wide in a range of habitats. The earliest fossil moss is Musites polytrichaceus from the Upper Carboniferous of France. There is no evidence to link bryophytes with either the green algae (Chlorophyta) or the more advanced pteridophytes.
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