Anther modes influence diversification rates in the animal-pollinated species-rich Didymocarpoideae.

IF 3.1 2区 环境科学与生态学 Q2 ECOLOGY
Evolution Pub Date : 2025-02-22 DOI:10.1093/evolut/qpaf038
Shao-Jun Ling, Xiao-Lan Yao, Wen-Qian Xiang, Ming-Xun Ren
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引用次数: 0

Abstract

Stamen traits significantly influence pollen presentation patterns and play a critical role in mating systems, floral evolution, and the diversification of angiosperms. Anthers within a flower can either develop freely or be united, resulting in three primary modes: separated anthers, synandry, and paired-united anthers. The impact of these anther modes on species diversification remains inadequately understood. In this study, we employed 14 plastid and nuclear ribosomal markers from 789 species to reconstruct the phylogenetic relationships of the Old World Didymocarpoideae, which are predominantly bee pollinated. We then investigated the evolutionary patterns of anther modes and assessed their potential role in species diversification. Our findings indicate that the evolution of anther modes and associated floral traits exhibited significant trait conservatism. Paired-united anthers likely represent the ancestral form of Didymocarpoideae, characterized by four fertile stamens with exserted locations for the anthers. Notably, derived synandry was associated with relatively high rates of species diversification, particularly in the species-rich Cyrtandra, Primulina, and Streptocarpus, which could be due to enhanced pollination precision facilitated by aggregations of anthers and pollen grains. This study elucidates the evolutionary transitions of different anther modes while highlighting their influence on diversification rates within Didymocarpoideae.

花药模式影响动物传粉、物种丰富的Didymocarpoideae的多样化率。
雄蕊性状显著影响花粉呈现模式,在被子植物的交配系统、花的进化和多样化中起着关键作用。花内花药可以自由发育,也可以合生,主要有三种模式:分离花药、并列花药和成对合生花药。这些花药模式对物种多样化的影响尚不清楚。本研究利用来自789个物种的14个质体和核糖体标记,重建了以蜜蜂传粉为主的东半球Didymocarpoideae的系统发育关系。然后,我们研究了花药模式的进化模式,并评估了它们在物种多样化中的潜在作用。结果表明,花药模式和相关花性状的进化具有显著的性状保守性。双合生的花药可能代表了Didymocarpoideae的祖先形式,其特征是四个可育的雄蕊,花药的位置外露。值得注意的是,衍生型同体与相对较高的物种多样化率相关,特别是在物种丰富的Cyrtandra、Primulina和Streptocarpus中,这可能是由于花药和花粉粒的聚集促进了授粉精度的提高。本研究阐明了不同花药模式的进化转变,同时强调了它们对双足科植物多样化率的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Evolution
Evolution 环境科学-进化生物学
CiteScore
5.00
自引率
9.10%
发文量
0
审稿时长
3-6 weeks
期刊介绍: Evolution, published for the Society for the Study of Evolution, is the premier publication devoted to the study of organic evolution and the integration of the various fields of science concerned with evolution. The journal presents significant and original results that extend our understanding of evolutionary phenomena and processes.
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