Within-host adaptation alters priority effects within the tomato phyllosphere microbiome
Within-host adaptation alters priority effects within the tomato phyllosphere microbiome
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DOI：
10.1038/s41559-023-02040-w
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发表时间：
2023-04-13
影响因子：
16.8
通讯作者：
Koskella, Britt
中科院分区：
文献类型：
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作者：
Debray, Reena;Conover, Asa;Koskella, Britt
在微生物群落组装中，较早建立的物种往往具有优势。在这里，作者探索了番茄植物相关微生物组中的这些优先效应，表明为寄主定植而进行的实验性进化选择改变了竞争对手之间的优先效应。为了预测生态群落的组成和功能随时间的变化，了解原位进化如何改变寄主和入侵物种之间的优先效应是至关重要的。叶圈微生物群落是探索优先效应的一个有用的模型系统，因为该系统在空间上被清楚地描绘出来，并且可以通过实验进行操纵。我们对番茄植株和早期定殖细菌Pantoea disdisa进行了一项实验进化研究，探索在竞争物种之前、同时或之后引入P.disama的优先效应。弥散疫霉迅速进化，侵入植物组织内的一个新的生态位，改变了它与植物微生物群其他成员的生态相互作用及其对寄主的影响。主流模型认为，适应主要提高栖息物种在其现有生态位内的效率，但在我们的研究系统中，栖息物种扩大了其生态位。这一发现表明，将现有的生态学理论应用于微生物群落具有潜在的局限性。
In microbial community assembly, species that establish earlier often have an advantage. Here, the authors explore these priority effects in the tomato plant-associated microbiome, showing that experimental evolution selecting for host colonization alters priority effects among competitors.To predict the composition and function of ecological communities over time, it is essential to understand how in situ evolution alters priority effects between resident and invading species. Phyllosphere microbial communities are a useful model system to explore priority effects because the system is clearly spatially delineated and can be manipulated experimentally. We conducted an experimental evolution study with tomato plants and the early-colonizing bacterium species Pantoea dispersa, exploring priority effects when P. dispersa was introduced before, simultaneously with or after competitor species. P. dispersa rapidly evolved to invade a new niche within the plant tissue and altered its ecological interactions with other members of the plant microbiome and its effect on the host. Prevailing models have assumed that adaptation primarily improves the efficiency of resident species within their existing niches, yet in our study system, the resident species expanded its niche instead. This finding suggests potential limitations to the application of existing ecological theory to microbial communities.