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首页> 外文期刊>The New Phytologist >Land-use intensity and host plant identity interactively shape communities of arbuscular mycorrhizal fungi in roots of grassland plants
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Land-use intensity and host plant identity interactively shape communities of arbuscular mycorrhizal fungi in roots of grassland plants

机译：土地利用强度与寄主植物身份相互作用共同塑造草地植物根系丛枝菌根真菌的群落

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摘要

We studied the effect of host plant identity and land-use intensity (LUI) on arbuscular mycorrhizal fungi (AMF, Glomeromycota) communities in roots of grassland plants. These are relevant factors for intraradical AMF communities in temperate grasslands, which are habitats where AMF are present in high abundance and diversity. In order to focus on fungi that directly interact with the plant at the time, we investigated root-colonizing communities. Our study sites represent an LUI gradient with different combinations of grazing, mowing, and fertilization. We used massively parallel multitag pyrosequencing to investigate AMF communities in a large number of root samples, while being able to track the identity of the host. We showed that host plants significantly differed in AMF community composition, while land use modified this effect in a plant species-specific manner. Communities in medium and low land-use sites were subsets of high land-use communities, suggesting a differential effect of land use on the dispersal of AMF species with different abundances and competitive abilities. We demonstrate that in these grasslands, there is a small group of highly abundant, generalist fungi which represent the dominating species in the AMF community.
机译：我们研究了寄主植​​物身份和土地利用强度（LUI）对草地植物根系中丛枝菌根真菌（AMF，Glomeromycota）群落的影响。这些是温带草原自由基AMF群落的相关因素，温带草原是AMF高度丰富和多样性的生境。为了关注当时与植物直接相互作用的真菌，我们调查了根定殖群落。我们的研究地点代表了LUI梯度，具有放牧，修剪和施肥的不同组合。我们使用大规模并行多标签焦磷酸测序技术来研究大量根样品中的AMF群落，同时能够追踪宿主的身份。我们表明寄主植物在AMF群落组成上有显着差异，而土地利用以植物物种特异性的方式改变了这种效应。中低土地利用地点的社区是高土地利用社区的子集，这表明土地利用对具有不同丰度和竞争能力的AMF物种扩散的影响不同。我们证明，在这些草原上，有一小撮高度丰富的通才真菌，它们代表了AMF社区中的主要物种。

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