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Vegetation context modifies selection on flowering start and plant height in an orchid perennial herb
Journal of Plant Ecology ( IF 2.7 ) Pub Date : 2021-05-20 , DOI: 10.1093/jpe/rtab048
Yun Wu 1, 2, 3, 4 , Xu-Yu Duan 5 , Guang-Li Liu 5 , Yong Xiang 1 , Bo Shu 1 , Qing-Jun Li 2, 3
Affiliation  

Abstract
Aims
Identifying the potential role of vegetation context (defined as the density, species identity/diversity and height of co-occurring plants) in modifying selection on floral traits is a critical step for clarifying and predicting the floral evolutionary trajectory in complex co-flowering species competition environments. It is also helpful to understand the variation in pollinator-mediated selection.
Methods
We experimentally reduced vegetation height around individual plants of Spiranthes sinensis (a bumblebee-pollinated perennial orchid herb) and estimated how vegetation context modified selection on four floral traits (flowering start, plant height, corolla size and number of flowers) through female function and pollen removal over two continuous years. We randomly selected independent plants in each year.
Important Findings
We demonstrated that vegetation context modified selection for earlier flowering start and shorter plant height of S. sinensis. The strength of selection differed between years. In addition, selection was stronger through female function than through pollen removal. Our findings indicate the potential role of vegetation context in shaping the differentiation and diversification of flowers in angiosperms.


中文翻译:

植被环境改变了兰花多年生草本开花开始和株高的选择

摘要
宗旨
确定植被环境(定义为共生植物的密度、物种身份/多样性和高度)在修改花卉性状选择方面的潜在作用是阐明和预测复杂共花物种竞争中花卉进化轨迹的关键步骤环境。了解传粉媒介介导的选择的变化也很有帮助。
方法
我们通过实验降低了Spiranthes sinensis(一种由熊蜂授粉的多年生兰花草本植物)周围的植被高度,并通过雌性功能和花粉估计了植被环境如何改变对四个花卉性状(开花开始、植物高度、花冠大小和花数)的选择连续两年搬迁。我们每年随机选择独立的植物。
重要发现
我们证明了植被环境改变了对S. sinensis较早开花开始和较短株高的选择。选择的强度因年份而异。此外,通过雌性功能进行的选择比通过去除花粉的选择更强。我们的研究结果表明植被环境在塑造被子植物花的分化和多样化方面的潜在作用。
更新日期:2021-05-20
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