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首页> 外文期刊>Ecological research >Sexual and vegetative reproduction in the aboveground part of a dioecious clonal plant, Dioscorea japonica (Dioscoreaceae)
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Sexual and vegetative reproduction in the aboveground part of a dioecious clonal plant, Dioscorea japonica (Dioscoreaceae)

机译：雌雄异株无性系薯Di（Dioscorea japonica）地上部分的有性和无性繁殖

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In dioecious clonal plants, the reproductive effort required to set seeds will be responsible for the larger investment in sexual reproduction by females. If there will be a trade-off in resource allocation between sexual and clonal reproduction, this differential sexual reproduction will lead to sexual differentiation in the relative amount of clonal reproduction. To test this prediction, we studied differences between the sexes in their phenologies and investments in sexual and vegetative reproduction (clonal reproduction by means of bulbils) with respect to ramet size in a dioecious clonal plant, Dioscorea japonica Thunb. The period of bulbil production overlapped the period during which infr-uctescences developed. Females flowered later, produced heavier inflorescences, and fewer flowers per inflorescence than did males. Regression analysis using the size of the individual plants demonstrated that large females made smaller investments in inflorescences and larger investments in sexual reproduction than did large males. In contrast, females invested fewer resources in vegetative reproduction than did males. However, the total investments in sexual and vegetative reproduction did not differ between the sexes. These results supported our hypothesis on the sexual differentiation in sexual and clonal reproduction.
机译：在雌雄异株的无性植物中，结实种子所需的生殖努力将导致雌性对性繁殖的大量投资。如果在有性繁殖与无性繁殖之间分配资源时需要权衡，这种有区别的有性繁殖将导致无性繁殖的相对数量发生性别差异。为了检验这一预测，我们研究了雌雄异株无性系薯Di（Dioscorea japonica Thunb）的性状和无性繁殖（通过鳞茎的无性繁殖）投资方面的性别差异。鳞茎产生的时期与花序发育的时期重叠。雌花较晚开花，产生较重的花序，且每花序的花少于雄花。使用单个植物的大小进行回归分析表明，大型雌性比大型雄性对花序的投入较小，而对有性生殖的投入较大。相反，女性在营养繁殖上投入的资源少于男性。但是，两性在无性繁殖和无性繁殖上的总投资没有差异。这些结果支持了我们关于性繁殖和克隆繁殖中的性别分化的假说。

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