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Production of male flowers does not decrease with plant sizein insect-pollinated Sagittaria trifolia,contrary to predictionsof size-dependent sex allocation

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Journal of Systematics and Evolution 2011年第5期49卷 379-385页

作者： Bing HAN Xiao-Fan WANG Shuang-Quan HUANG(College of Life Sciences,Wuhan University,Wuhan 430072,China) (College of Life Sciences Wuhan University Wuhan 430072 China)

It has been proposed that relative allocation.to female function increases with plant size in animalpollinated *** investigations in several monoecious Sagittaria species seem to run contrary to the prediction of size-dependent sex allocation.SDS),throwing doubt on the generalization of *** size,phenotypic gender,and flower production were measured in experimental populations of an aquatic,insect-pollinated herb Sagittaria trifolia(Alismataceae) under highly different *** comparison of ramets produced clonally can reduce confounding effects from genetic and environmental *** the high-density population,48% of ramets were male without female flowers,but in the low-density population all ramets were *** observed allometric growth in reproductive allocation.with ramet size,as evident in biomass of reproductive structures and number of ?***,within both populations female and male flower production were isometric with ramet size,in contrast to an allometric growth in femaleness as predicted by *** gender was not related to ramet size in either *** results indicated that large plants may increase both female and male function even in animal-pollinated plants,pointing towards further studies to test the hypothesis of size-dependent sex allocation.using different allocation.currencies.

关键词： Alismataceae clonal reproduction ?ower production insect-pollinated monoecious Sagittaria trifolia size-dependent sex allocation.

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