sporophyte

sporophytic /spawr'euh fit"ik, spohr'-/, adj.
/spawr"euh fuyt', spohr"-/, n. Bot.
the form of a plant in the alternation of generations that produces asexual spores. Cf. gametophyte.
[1885-90; SPORO- + -PHYTE]

* * *

In many plants and algae, the nonsexual phase in the alternation of generations, or an individual representing the phase.

The alternate, sexual phase is the gametophyte. In the sporophyte phase, a diploid (see ploidy) plant body grows and eventually produces spores through meiosis. These spores divide by mitosis to produce haploid gametophytes, which then can carry out sexual reproduction.

* * *

      in certain plants and algae, nonsexual phase (or an individual representing the phase) in the alternation of generations—a phenomenon in which two distinct phases (a haploid and a diploid phase) occur in the life history of a plant, each phase producing the other. (The alternate, sexual phase is the gametophyte.) In the sporophyte phase, a diploid plant body grows and eventually produces spores through meiosis. These spores divide mitotically to produce haploid, gamete-producing bodies called gametophytes. The union of two gametes during fertilization produces a diploid zygote, which divides mitotically to form a new sporophyte.

      The character and relative extent of the two phases vary greatly among different groups of plants and algae. During the course of evolution, the gametophyte stage is progressively reduced; thus, in the higher (i.e., vascular) plants, the sporophyte is the dominant phase in the life cycle, whereas in the more primitive nonvascular plants the gametophyte remains dominant. See also gametophyte.

* * *


Universalium. 2010.

Look at other dictionaries:

  • sporophyte — [ spɔrɔfit ] n. m. • 1897; de spore et phyte ♦ Bot. 1 ♦ Individu producteur de spores d une espèce à reproduction sexuée. 2 ♦ Phase du cycle reproducteur de certains végétaux inférieurs et de tous les spermaphytes et ptéridophytes. ● sporophyte… …   Encyclopédie Universelle

  • sporophyte — [spō′rəfīt΄, spôr′əfīt΄] n. [ SPORO + PHYTE] in certain plants and algae, the spore bearing generation that is diploid and reproduces by spores: the sporophyte generation begins with the fertilized egg and ends with meiosis: distinguished from… …   English World dictionary

  • Sporophyte — Spo ro*phyte (sp[=o] r[ o]*f[imac]t), n. [Spore + Gr. fyto n plant.] (Bot.) In plants exhibiting alternation of generations, the generation which bears asexual spores; opposed to {gametophyte}. It is not clearly differentiated in the life cycle… …   The Collaborative International Dictionary of English

  • sporophyte — sporophyte. См. спорофит. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • sporophyte — from comb. form of Gk. spora “spore” (see SPORE (Cf. spore)) + phyte (see PHTYO (Cf. phtyo )) …   Etymology dictionary

  • Sporophyte — ).The sporophyte produces spores (hence the name), by meiosis. These meiospores develop into a gametophyte. Both the spores and the resulting gametophyte are haploid, meaning they only have one set of homologous chromosomes. The mature… …   Wikipedia

  • Sporophyte — Le sporophyte est la génération du cycle de reproduction des plantes qui produit des spores, microspores et macrospores, qui sont disséminées ou non. Cette phase du cycle de développement fait suite à la fécondation et contient donc le double de… …   Wikipédia en Français

  • sporophyte — noun The plant (or the diploid phase in its life cycle) which produces spores by meiosis in order to produce gametophytes. (b) sporophyte with foot reduced, the entire sporophyte enveloped by the calyptra, which is ± stipitate at the base. See… …   Wiktionary

  • sporophyte — sporofitas statusas T sritis augalininkystė apibrėžtis Augalas, kuris išaugina sporas. atitikmenys: angl. sporophyte rus. спорофит ryšiai: sinonimas – nelytinė karta …   Žemės ūkio augalų selekcijos ir sėklininkystės terminų žodynas

  • sporophyte — noun Etymology: International Scientific Vocabulary Date: 1886 the diploid individual or generation of a plant exhibiting alternation of generations that produces asexual spores compare gametophyte • sporophytic adjective …   New Collegiate Dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.