| 释义 |
merogamy, n. Biol.|mɛˈrɒgəmɪ|
[ad. F. mérogamie (coined by P. A. Dangeard 1900, in Botaniste VII. v. 265): see mero-1, -gamy.]
A mode of sexual reproduction, found in certain protozoa and algae, characterized by the fusion of merogametes formed by fission of vegetative cells. Cf. hologamy n.
1901Jrnl. R. Microsc. Soc. 56 Reduced autophagy or merogamy, which does not require the participation of the whole of a second gamete, but only either of its cytoplasm or of its nucleus. 1965Poljanskij & Chejsin Dogiel's Gen. Protozool. (ed. 2) vii. 310 The number of gametes arising from the vegetative forms may vary from two (paired merogamy) to several hundred (multiple merogamy). Ibid. 322 The comparative rarity of cases of paired merogamy..is perhaps partly due to its being unsuitable for rapid reproduction. 1979Tsitologiya XXI. 270 Such forms of gametogenesis as transformation of vegetative cells into gametes and merogamy have become prohibited in Ciliophora.
Hence meroˈgamete n., a gamete produced by fission of a vegetative cell, which is usually smaller than the parent cell.
1932Borradaile & Potts Invertebrata ii. 84 In the male gamont the nucleus divides several times, and the daughter nuclei are set free with portions of the cytoplasm as biflagellate male gametes, which are thus merogametes. 1967G. A. Kerkut Borradaile & Potts's Invertebr. (ed. 4) ii. 36 C[hlamydomonas] brauni and other species..form merogametes of two sizes and are definitely anisogamous. |