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花粉生产的变化,花粉异形和卵子生产的变化

Samson Acoca-Pidolle¹, Perrine Gauthier¹, Pierre-Olivier Cheptou¹

¹CEFE, Univ. Montpellier, CNRS, EPHE, IRD, Montpellier, France.

Annals of botany

|September 3, 2025

概括

尽管自产率迅速增加,但花与卵子的比率和花粉特征的演变迟缓. 花粉产量没有变化,但较低的比例与较高的祖先自我相关.

科学领域:

进化生物学
植物繁殖策略
种群遗传学

背景情况:

花粉:卵子的比率往往与植物的自杀率相反.
维奥拉阿文西斯表现出快速演变的花特征和增加的自杀率.
这项研究研究了花粉特征的快速演变以及交配系统的变化.

研究的目的:

测试viola arvensis是否在花粉:卵子比率和花粉异态度方面发生了快速演变.
对花粉和卵子产生的时间变化进行研究.
模拟花粉孔数和交配系统之间的关系.

主要方法:

复生生态学方法比较祖先 (30岁) 和后代 (2021年) 种群.
每个群体50个个体的卵子,花粉和三个花粉孔的量化.
开发一个将花粉孔数与交配系统动态联系起来的模型.

主要成果:

没有观察到花粉或卵子产生的显著时间变化.
具有较低花粉:卵子比率的种群表现出较高的祖先自杀率.
没有发现开口数和自动化率之间的预测正相关性.

结论:

在V. arvensis中,花粉和卵子的产生与花形态不同,没有随着自我增加而迅速演变.
对于其他自我综合征特征而言,花粉:卵子比率的变化似乎有所延迟.
花粉异构与自制之间没有相关性,可能是由于花粉减少,受粉者减少或缺乏选择.

关键词:

维奥拉阿尔文西斯花粉异态性花粉与卵子的比率快速演变复活生态学自我症候群

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