磷酸盐饥饿反应系统：它在植物-微生物相互作用调节中的作用,Plant & Cell Physiology

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磷酸盐饥饿反应系统：它在植物-微生物相互作用调节中的作用
Plant & Cell Physiology ( IF 3.9 ) Pub Date : 2021-01-30 , DOI: 10.1093/pcp/pcab016
Mariel C Isidra-Arellano _{1,

2} , Pierre-Marc Delaux ₃ , Oswaldo Valdés-López ₁

Affiliation

摘要

磷酸盐 (Pi) 缺乏是限制全球植物生产力的主要因素。陆地植物已经进化出不同的策略来应对缺磷。例如，植物会激活所谓的磷饥饿反应 (PSR) 系统，该系统受转录因子磷酸盐饥饿反应 1 (PHR1) 的调节，从而相应地调整植物的生长和代谢活动。此外，陆地植物还可以与土壤微生物建立共生关系，能够从植物无法进入的土壤复合物中溶解 Pi 并将其转移到寄主植物。越来越多的证据表明 PHR1 和 PSR 系统不仅在非生物环境中调节植物对磷缺乏的反应，而且它们对于植物与能够为它们提供可溶性磷的有益土壤微生物正确相互作用也至关重要。最近的证据表明，PHR1 和 PSR 系统有助于通过调节植物免疫系统来塑造与植物相关的微生物群。PSR 和免疫系统输出由 PHR1 紧密集成。在这里，我们回顾了植物宿主 Pi 状态如何影响与土壤微生物共生关系的建立。我们还强调了 PHR1 和 PSR 系统在塑造根微生物组和植物对缺磷反应方面的作用。

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The Phosphate Starvation Response System: Its Role in the Regulation of Plant–Microbe Interactions

Abstract

Phosphate (Pi) deficiency is a major factor limiting plant productivity worldwide. Land plants have evolved different strategies to cope with Pi deficiency. For instance, plants activate the so-called Pi starvation response (PSR) system, which is regulated by the transcription factor Phosphate Starvation Response1 (PHR1), to adjust plant growth and metabolic activity accordingly. Additionally, land plants can also establish mutualistic associations with soil microbes able to solubilize Pi from plant-inaccessible soil complexes and to transfer it to the host plant. A growing body of evidence indicates that PHR1 and the PSR system not only regulate the plant responses to Pi deficiency in an abiotic context, but they are also crucial for plants to properly interact with beneficial soil microbes able to provide them with soluble Pi. Recent evidence indicates that PHR1 and the PSR system contribute to shaping the plant-associated microbiota through the modulation of the plant immune system. The PSR and immune system outputs are tightly integrated by PHR1. Here, we review how plant host Pi status influences the establishment of the mutualistic association with soil microbes. We also highlight the role of PHR1 and the PSR system in shaping both the root microbiome and plant responses to Pi deficiency.

更新日期：2021-01-30

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