Multiple Mutualism Effects generate synergistic selection and strengthen fitness alignment in the interaction between legumes, rhizobia and mycorrhizal fungi
Multiple Mutualism Effects generate synergistic selection and strengthen fitness alignment in the interaction between legumes, rhizobia and mycorrhizal fungi
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DOI：
10.1111/ele.13814
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发表时间：
2021-06-10
期刊：
影响因子：
8.8
通讯作者：
Stinchcombe, John R.
中科院分区：
文献类型：
--
作者：
Afkhami, Michelle E.;Friesen, Maren L.;Stinchcombe, John R.
几乎所有的生物体都参与多种互惠，这些复杂的相互作用中的互补性可以导致协同适应效应。然而，它仍然在很大程度上未经测试，如何多重互惠影响相互作用的物种的生态进化动力学。我们测试了多种微生物互利共生固氮细菌和菌根真菌如何影响其共同宿主植物（蒺藜苜蓿）的性状选择和遗传力，以及合作伙伴之间的健身对齐。我们的研究结果表明，第一次，多个互惠协同影响主机性状的选择和遗传力，并提高健身互惠之间的对齐。具体来说，我们发现与多种微生物共生体的相互作用使植物结构特征的自然选择强度增加了一倍，导致植物繁殖成功的遗传力提高了2至3倍，并且固氮细菌和植物之间的适应性对齐增加了一倍以上。这些研究结果表明，由多种互惠产生的协同作用延伸到微进化变化的关键组成部分，强调了多种互惠效应对进化轨迹的重要性。
Nearly all organisms participate in multiple mutualisms, and complementarity within these complex interactions can result in synergistic fitness effects. However, it remains largely untested how multiple mutualisms impact eco-evolutionary dynamics in interacting species. We tested how multiple microbial mutualists-N-fixing bacteria and mycorrrhizal fungi-affected selection and heritability of traits in their shared host plant (Medicago truncatula), as well as fitness alignment between partners. Our results demonstrate for the first time that multiple mutualisms synergistically affect the selection and heritability of host traits and enhance fitness alignment between mutualists. Specifically, we found interaction with multiple microbial symbionts doubled the strength of natural selection on a plant architectural trait, resulted in 2- to 3-fold higher heritability of plant reproductive success, and more than doubled fitness alignment between N-fixing bacteria and plants. These findings show synergism generated by multiple mutualisms extends to key components of microevolutionary change, emphasising the importance of multiple mutualism effects on evolutionary trajectories.