| 释义 |
apogamy Bot.|əˈpɒgəmɪ|
[f. Gr. ἀπό apo- + γάµος marriage (cf. gamo-).]
Absence of sexual reproduction; asexual reproduction, agamogenesis; spec. in ferns and other cryptogams, production of the perfect plant directly from a bud on the prothallus instead of by the usual sexual process. So apogamic |æpəʊˈgæmɪk|, apogamous |əˈpɒgəməs| adjs., characterized by or of the nature of apogamy; agamogenetic (spec. in the way described above); hence aˈpogamously adv. (Cf. apospory, etc.)
1878Vines in Jrnl. Bot. VII. 360 A transition from an oophore to a sporophore without the intervention of sexual reproductive organs. Apogamy (De Bary). Ibid. 361 We may speak of this plant as being ‘aposporous’, using a word which is symmetrical with the term ‘apogamous’, applied by De Bary to those Ferns in whose life-history no process of sexual reproduction occurs. 1883Ann. Rep. Smithsonian Inst. 1881 403 Forms where oogonia are found without male pollinodia..considered as representing a distinct apogamous species. 1886Jrnl. R. Microsc. Soc. 2nd Ser. VI. 298 The author could not detect any act of impregnation [in a parasite on the olive], and believes that reproduction is apogamic. 1886Vines in Encycl. Brit. XX. 431/2 By the suppression either of the sexually produced spore or of the asexually produced spore; the former is an instance of apogamy, the latter of apospory. Ibid. 431/1 [Spores] formed..without a sexual process—in a word, apogamously. 1921Ann. Bot. XXXV. 184 We see..in the true apogamy of other species, a further manifestation of the powers of heterosis..ending in apomictical reproduction. |