Trade‐offs between sexual and clonal reproduction in an aquatic plant: experimental manipulations vs. phenotypic correlations
Trade‐offs between sexual and clonal reproduction in an aquatic plant: experimental manipulations vs. phenotypic correlations
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DOI：
10.1111/j.1420-9101.2004.00701.x
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发表时间：
2004-05
影响因子：
2.1
通讯作者：
F. L. Thompson;Christopher G. Eckert
中科院分区：
文献类型：
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作者：
F. L. Thompson;Christopher G. Eckert
分配有限的资源所产生的权衡是生命史进化的一个核心概念。我们通过在两个不同的营养环境中实验操纵性投资，量化了水生植物猪脚的有性繁殖和克隆繁殖之间的权衡。种子产量的增加导致了一种重大但非线性的权衡。给一半的花授粉大大减少了无性系球茎的产量，但给剩余的花授粉不会造成任何进一步的权衡。在明显限制植物生长的低营养条件下，权衡并不强烈。实验诱导的权衡没有反映在生长在统一温室环境中的8个种群内植物有性分配和克隆分配之间的负表型相关中。有性分配增加的影响逐渐减弱，加上实验操作和表型相关性之间缺乏一致性，这表明有性繁殖和克隆繁殖之间的权衡不太可能限制该物种生殖策略的进化。
That trade‐offs result from the allocation of limited resources is a central concept of life history evolution. We quantified trade‐offs between sexual and clonal reproduction in the aquatic plant, Butomus umbellatus, by experimentally manipulating sexual investment in two distinct nutrient environments. Increasing seed production caused a significant but nonlinear trade‐off. Pollinating half of all flowers strongly reduced clonal bulbil production, but pollinating the remaining flowers did not cause any further trade‐off. Trade‐offs were not stronger under low nutrient conditions that clearly limited plant growth. Experimentally induced trade‐offs were not reflected in negative phenotypic correlations between sexual and clonal allocation among plants within eight populations grown in a uniform greenhouse environment. Diminishing effects of increased sexual allocation plus a lack of accord between experimental manipulations and phenotypic correlations suggest that trade‐offs between sexual and clonal reproduction are unlikely to constrain the evolution of reproductive strategy in this species.