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在竞争和互惠主义下,特征和可塑性进化在进化的双向酵母社区中

ShengPei Wang¹, Renuka Agarwal¹, Kari A Segraves²

¹Department of Biology, Syracuse University, Syracuse, New York, United States of America.

|January 15, 2025

概括

竞争和互惠等生物相互作用会影响酵母菌的进化,影响生长和资源使用. 然而,与非生物因素相比,这些相互作用对表型可塑性演变的影响很小.

科学领域:

进化生物学进化生物学
生态生态学生态生态学
微生物生态学微生物生态学

背景情况:

现型可塑性演化对于非生物因素的理解很好,但对于生物相互作用的理解较少.
生物相互作用,如竞争和互惠主义,是进化变化的关键驱动力.
了解这些相互作用如何塑造特征进化和可塑性是预测生态动态的关键.

研究的目的:

实验性地研究竞争和相互主义对酒酵母特征和可塑性进化的影响.
在不同的生物条件下量化生长速度和资源利用效率 (RUE) 的进化变化.
为了比较单独进化的酵母菌株的进化轨迹,与竞争对手和相互合作者.

主要方法:

在对联实验社区中利用了转基因酒酵母.
量化了生长速度,RUE及其可塑性的进化变化.
在受控条件下将进化菌株与祖先菌株进行比较.

主要成果:

单独进化的菌株显示RUE和RUE可塑性下降,增长率和效率之间的权衡.
竞争导致了更高的增长率,更低的RUE,以及更强大的增长效率权衡.
互惠主义导致较低的增长率,更高的RUE和较弱的权衡,对任何相互作用的可塑性进化影响很小.

结论:

生物相互作用显著影响酵母中的生长率和RUE的演变.
竞争和相互主义施加不同的选择性压力,导致不同的进化结果.
在推动表型可塑性演变方面,非生物因素可能比生物相互作用发挥更实质性的作用.

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