一朵花的形状:形态进化的速度如何推动Ericales和angiosperms中的花多样化
Julian Herting1, Jürg Schönenberger2, Hervé Sauquet1,3
1National Herbarium of New South Wales, Botanic Gardens Sydney, Locked Bag 6002, Mount Annan, NSW 2567, Australia.
American journal of botany
|July 17, 2023
概括
在Ericales中,花的进化表明,雄性生殖器官 (androecium) 的进化速度最快,导致了高的花差异. 这种快速androecium进化的模式在血管苗中保存,揭示了植物形态学的关键见解.
科学领域:
- 植物学 植物学
- 进化生物学 进化生物学
- 形态进化 形态进化 形态进化
背景情况:
- 在Ericales (星形序列) 中,花的差异在各个家族和花模块 (,androecium,gynoecium) 之间有很大的差异.
- 以前的研究发现了花差异的不平等分布,但没有确定异质的进化速率是否是原因.
研究的目的:
- 调查形态进化的异质速率是否驱动了Ericales中的花差异模式.
- 为了比较跨花模块和血管种群的进化速率.
主要方法:
- 编制了22个家族的414个Ericales物种的33个花特征的数据集.
- 利用等速率马尔科夫模型用于祖先状态重建和估计的形态进化速率.
- 创建了Ericales,angiosperms和子类的"速率概况",使用单独的angiosperm-wide数据.
主要成果:
- 在Ericales和angiosperms中,androecium与周围植物和gynoecium特征相比始终表现出更高的进化速率.
- 高和低的进化速率都可能导致Ericales中的花差异显著.
- 观察到的加速安德罗进化的模式在主要的血管种群中保持着.
结论:
- 在Ericales androecium中加速的形态进化可能解释了其更高的花差异.
- 速率分析是分析和理解花进化动态的有效方法.
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