Microbiota colonizing plant roots and their vicinity were shown not to be just random associations, but compose, at least to some extent, host-selected microbial consortia. The plant physiological status, especially the nutrient status, prompts changes in plant morphology and metabolism, which successively imposes a selective pressure on microbial communities. It is well established that a low phosphate status of the host plant activates the molecular machinery underlying the development of mutualistic associations in the host root with arbuscular mycorrhizal fungi (AMF). We hypothesize that the plant´s response to changing nutrient stoichiometry affects processes at the root-mycosphere interface which promote or repress also root interactions with microbial taxa other than AMF. As a consequence, fundamental mechanisms underlying these interactions would be shared in AM host and non-host plants. A detailed understanding of the processes involved in maintenance of plant nutrient homeostasis could contribute to novel strategies in tailoring predominantly parasitic or commensalistic plant-microbe interactions towards beneficial associations.

中文翻译：

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营养物平衡在塑造植物根真菌相互作用中的作用：事实和推测。

菌落定植在植物的根部及其附近并不仅是随机的关联，而且至少在一定程度上由宿主选择的微生物群落组成。植物的生理状态，特别是营养状态，促使植物形态和代谢发生变化，从而对微生物群落施加了选择性压力。公认的是，寄主植物的低磷酸盐状态激活了与丛枝菌根真菌（AMF）共同发展寄主根的分子机制。我们假设植物对营养物化学计量变化的反应会影响根-菌层界面的过程，该过程也促进或抑制与除AMF之外的微生物类群的根相互作用。作为结果，这些交互作用的基本机制将在AM宿主和非宿主工厂中共享。对维持植物营养稳态的过程的详细了解可能有助于新颖的策略，使主要是寄生或共生的植物-微生物相互作用适应有益的联系。