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雌雄同体植物花寿命与自体受精的共同进化

雌雄同体植物花寿命与自体受精的共同进化

Evolution
Pub Date  : 2021-06-30
DOI : 10.1111/evo.14303

Kuangyi Xu 1

植物中普遍存在的自体受精通常根据其发生的时间分为三种模式——先验、竞争和延迟自交。花卉寿命影响授粉机会和分配给生育的资源,从而可能影响不同自花受精模式的选择。此外,自交导致受精较少依赖传粉媒介,这也可能影响花寿命的进化。使用博弈论模型,我研究了近交衰退和授粉环境如何影响三种自花授粉模式与花卉寿命的共同进化。先前自交的入侵允许较短的花寿命的后续进化,因此比竞争自交更受青睐。当花粉沉积率低时,即使在高度近交抑制的情况下,先前自交也可以入侵,但被更高水平的延迟自交所抑制。一般来说,自交的进化降低了花的寿命,并揭示了花粉沉积和去除对花寿命的不对称影响。这项研究表明,通过结合花繁殖策略(例如,花寿命)和授粉生态学(例如,应收率),将自交和异交作为具体过程的实现可以更好地了解交配系统和花繁殖性状的进化。并揭示了花粉沉积和去除对花寿命的不对称影响。这项研究表明,通过结合花繁殖策略(例如,花寿命)和授粉生态学(例如,应收率),将自交和异交作为具体过程的实现可以更好地了解交配系统和花繁殖性状的进化。并揭示了花粉沉积和去除对花寿命的不对称影响。这项研究表明,通过结合花繁殖策略(例如,花寿命)和授粉生态学(例如,应收率),将自交和异交作为具体过程的实现可以更好地了解交配系统和花繁殖性状的进化。

The coevolution of flower longevity and self-fertilization in hermaphroditic plants

Self-fertilization, prevalent in plants, is typically divided into three modes – prior, competing, and delayed selfing – based on the timing in which it occurs. Flower longevity affects both the opportunity for pollination and the resources allocated for fertility, and thus may influence the selection on different modes of self-fertilization. Additionally, selfing causes fertilization to depend less on pollinators, which may also influence the evolution of flower longevity. Using game-theoretical models, I investigate how inbreeding depression and the pollination environment influences the coevolution of the three modes of self-fertilization with flower longevity. Invasion of prior selfing allows the subsequent evolution of shorter flower longevity, and thus is favored over competing selfing. Prior selfing can also invade even under high inbreeding depression when the pollen deposition rate is low, but is inhibited by a higher level of delayed selfing. In general, the evolution of selfing decreases flower longevity, and reveals asymmetric effects of pollen deposition and removal on flower longevity. This study suggests considering realization of selfing and outcrossing as concrete processes by incorporating flower reproductive strategies (e.g., flower longevity) and pollination ecology (e.g., accrual rate) may offer better understanding of the evolution of mating systems and flower reproductive traits.

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相关知识

【引用】共同进化
花寿命的进化生态学意义
花卉与人类共同进化
花寿命生物地理格局及进化适应研究取得进展
花寿命生物地理格局及进化适应方面取得进展
植物花寿命缘何正在缩短
植物的性( 花的起源与植物繁殖的艺术)
研究发现:植物的花寿命可能呈现缩短趋势
一朵花能开放多久?——昆明植物所在花寿命生物地理格局及进化适应方面取得重要进展
科学网—植物的性( 花的起源与植物繁殖的艺术)

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