Chemotaxis of Beneficial Rhizobacteria to Root Exudates: The First Step towards Root-Microbe Rhizosphere Interactions.

Chemotaxis of Beneficial Rhizobacteria to Root Exudates: The First Step towards Root-Microbe Rhizosphere Interactions.
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有益根际细菌对根系分泌物的趋化性:根际微生物根际相互作用的第一步

DOI:
10.3390/ijms22136655
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发表时间:
2021-06-22
影响因子:
5.6
通讯作者:
Zhang R
Zhang R
中科院分区:
生物学2区
文献类型:
--
作者:
Feng H;Fu R;Hou X;Lv Y;Zhang N;Liu Y;Xu Z;Miao Y;Krell T;Shen Q;Zhang R

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趋化性是指根际细菌在不同的引诱剂和驱避剂作用下沿梯度方向运动的能力,在根际细菌定殖过程中起着重要的作用。根际是植物-微生物相互作用的独特生态位。根分泌物是由数百种不同化合物组成的化学效应物的高度复杂的混合物。对根分泌物的趋化性启动根际细菌的招募和建立细菌-根相互作用。在过去的几年中,已经取得了重要的进展,在确定根分泌物成分,在殖民化过程中发挥关键作用,以及在同源化学感受器的识别。本文第一部分综述了具有代表性的诱导植物根际细菌趋化性的化学效应物的作用,并讨论了根际细菌化学感受器的结构和功能。在第二部分中,我们回顾了根际细菌趋化性和其他根际微生物相互作用如何促进建立有益的根际细菌-植物相互作用,从而导致植物生长促进和保护植物健康的研究结果。在最后一部分中,我们确定了现有的知识差距,并讨论了未来的研究工作,是必要的,以关闭它们。
Chemotaxis, the ability of motile bacteria to direct their movement in gradients of attractants and repellents, plays an important role during the rhizosphere colonization by rhizobacteria. The rhizosphere is a unique niche for plant–microbe interactions. Root exudates are highly complex mixtures of chemoeffectors composed of hundreds of different compounds. Chemotaxis towards root exudates initiates rhizobacteria recruitment and the establishment of bacteria–root interactions. Over the last years, important progress has been made in the identification of root exudate components that play key roles in the colonization process, as well as in the identification of the cognate chemoreceptors. In the first part of this review, we summarized the roles of representative chemoeffectors that induce chemotaxis in typical rhizobacteria and discussed the structure and function of rhizobacterial chemoreceptors. In the second part we reviewed findings on how rhizobacterial chemotaxis and other root–microbe interactions promote the establishment of beneficial rhizobacteria-plant interactions leading to plant growth promotion and protection of plant health. In the last part we identified the existing gaps in the knowledge and discussed future research efforts that are necessary to close them.
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