| 释义 |
gameto-
combining form of gamete, as gaˈmetocyst, a cyst containing two associated gametocytes; gaˈmetocyte, a cell that gives rise to gametes; gametoˈgenesis, the formation of gametes; gametoˈgenic, -ˈogenous adjs., giving rise to gametes or to reproductive cells; gameˈtogeny, -ˈtogony = gametogenesis; gameto-nucleus (see quot.); gaˈmetophore Bot., a modified branch or filament bearing sexual organs; so gametoˈphoric a.; gametophyte, the sexual form of a thallophyte, as distinguished from the sporophyte, or asexual form; gametoˈphytic a., pertaining to or occurring on a gametophyte.
1926C. M. Wenyon Protozool. I. i. 134 A cyst may be formed around two gametocytes, as in the case of gregarines. It is then distinguished as a *gametocyst. 1955Hunter & Lwoff Biochem. & Physiol. Protozoa II. 190 The gametes escape from the gametocyst of Trichonympha after it is ingested by the roach.
1899Nature 3 Aug. 322/2 The parasites [of malaria] reach their highest development within the vertebrate host, and become either (a) sporocytes or (b) *gametocytes. 1925E. B. Wilson Cell (ed. 3) vii. 594 The nucleus of each gametocyte now divides successively to form a number..of gamete-nuclei which pass to the periphery and here are budded off..to form minute true gametes. 1966New Scientist 1 Sept. 482/1 The original, parent parasite in the red cell may produce..a merozoite..[or] a gametocyte.
1900B. D. Jackson Gloss. Bot. Terms 108/1 *Gametogenesis, the production of gametes. 1946Nature 14 Dec. 879/1 In the adult Drosophila..mustard gas produces a selective action on gametogenesis. 1966F. A. E. Crew Found. Genetics viii. 154 The essential features of gametogenesis are the pairing or conjugation of the two members of each of homologous chromosomes, their separation without any longitudinal splitting and their passage into the nuclei of the two daughter cells.
1900B. D. Jackson Gloss. Bot. Terms 108/1 *Gametogenic, giving rise to gametes. 1903J. B. Farmer et al. in Proc. R. Soc. LXXII. 500 The gametogenic tissues which are destined to become the reproductive elements. Ibid., The term gametogenic, as here proposed, is also intended to include the primary sporogenous tissue of plants. 1971Nature 2 July 65/1 The gametogenic events of the living testis.
1903E. A. Minchin in E. R. Lankester Treat. Zool. I. ii. 210 The gametocytes are termed *gametogenous mononts, the formation of gametes being regarded as a special case of monogony.
1900B. D. Jackson Gloss. Bot. Terms 108/1 *Gametogeny, the production of gametes. 1971Nature 9 Apr. 408 By the fourth week gametogeny has been completed and mating has begun.
1910H. B. Fantham in Proc. Zool. Soc. II. 678 The processes leading to the formation of the gametes may be termed *gametogony. 1969New Scientist 8 May 306/1 A tiny protozoan that divides its time between a sexual cycle (gametogony)..and two asexual cycles.
1891M. Hartog in Nature 17 Sept. 484/1 The *gameto⁓nucleus is formed by the union of several nuclei.
1895D. H. Campbell Struct. & Devel. Mosses & Ferns i. 2 The gametophyte itself may show two well-marked phases, the protonema and the *gametophore. 1957H. C. Bold Morphol. Plants xvi. 290 The leafy Sphagnum plant sometimes is called the leafy gametophore.., inasmuch as it bears the sex organs when mature.
1895D. H. Campbell Struct. & Devel. Mosses & Ferns vi. 155 The sexual organs are borne either separately or together at the summit of the *gametophoric branches.
1895*Gametophyte [see gametophore above]. 1897Willis Flower. Pl. I. 16 These are often termed gametes, and the plant bearing them the gametophyte.
1905D. H. Campbell Struct. & Devel. Mosses & Ferns (ed. 2) 640/2 *Gametophytic buds. 1919F. O. Bower Bot. Living Plant iii. xxi. 341 This gametophytic budding is less common here [sc. in ferns] than in the Bryophytes. 1959Foster & Gifford Compar. Morphol. Vascular Plants ii. 20 The alternation of sporophytic and gametophytic generations in the life cycle. |