| 释义 |
SpermatophytaenUK
Thesaurus| Noun | 1. | Spermatophyta - seed plants; comprises the Angiospermae (or Magnoliophyta) and Gymnospermae (or Gymnospermophyta); in some classification systems Spermatophyta is coordinate with Pteridophyta (spore producing plants having vascular tissue and roots) and Bryophyta (spore producing plants lacking vascular tissue and roots)division Spermatophytadivision - (botany) taxonomic unit of plants corresponding to a phylumkingdom Plantae, plant kingdom, Plantae - (botany) the taxonomic kingdom comprising all living or extinct plantsclass Gymnospermae, division Gymnospermophyta, Gymnospermae, Gymnospermophyta - plants having naked seeds not enclosed in an ovary; in some systems considered a class (Gymnospermae) and in others a division (Gymnospermophyta); comprises three subdivisions (or classes): Cycadophytina (class Cycadopsida) and Gnetophytina (class Gnetopsida) and Coniferophytina (class Coniferopsida); in some classifications the Coniferophytina are divided into three groups: Pinophytina (class Pinopsida) and Ginkgophytina (class Ginkgopsida) and Taxophytina (class Taxopsida)Angiospermae, Anthophyta, class Angiospermae, division Anthophyta, division Magnoliophyta, Magnoliophyta - comprising flowering plants that produce seeds enclosed in an ovary; in some systems considered a class (Angiospermae) and in others a division (Magnoliophyta or Anthophyta) |
SpermatophytaenUK
Spermatophyta higher (vascular) plants that form seeds. The plants comprise the Gymnospermae (including many fossil groups, such as Lyginopteridopsida, Bennettitales, and Cordai-tales) and Angiospermae. Other higher plants, for example, Rhyniophyta, Bryophyta, Lycopodiales, Psilophyta, Equiseta-ceae, and Polypodiophyta, do not form seeds. In Spermatophyta the gametophyte, that is, the sexual generation, is reduced, especially in angiosperms, and develops on the sporophyte. Reproduction by seeds is progressive adaptation in comparison with reproduction only by spores. Spermatophyta evolved from spore plants; this is indicated by homology between organs of reproduction in Spermatophyta and vascular spore plants. Spermatophyta play an especially important role in the world’s plant cover and in man’s economic activity. Earlier, when the sexual process had not yet been sufficiently studied, Spermatophyta were called Phanerogamae, in contrast to spore plants, which were known as Cryptogamae. REFERENCESTakhtadzhian, A. L. Vysshie rasteniia, vol. 1. Moscow-Leningrad, 1956.
Osnovy paleontologii: Golosemennye i pokrytosemennye. Moscow, 1963.
Lehrbuch der Botanik für Hochschulen, 30th ed. Jena, 1971.M. E. KIRPICHNIKOV MedicalSeespermatophyteSpermatophytaenUK
Related to Spermatophyta: Gymnospermae, AngiospermsSynonyms for Spermatophytanoun seed plantsSynonymsRelated Words- division
- kingdom Plantae
- plant kingdom
- Plantae
- class Gymnospermae
- division Gymnospermophyta
- Gymnospermae
- Gymnospermophyta
- Angiospermae
- Anthophyta
- class Angiospermae
- division Anthophyta
- division Magnoliophyta
- Magnoliophyta
|