Rhizobial Chemotaxis and Motility Systems at Work in the Soil.
Rhizobial Chemotaxis and Motility Systems at Work in the Soil.
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土壤中根瘤菌的趋化性和移动性系统。
DOI：
10.3389/fpls.2021.725338
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发表时间：
2021
影响因子：
5.6
通讯作者：
Sánchez-Cañizares C
中科院分区：
文献类型：
--
作者：
Aroney STN;Poole PS;Sánchez-Cañizares C
细菌通常以单个细胞的形式在水介质或固体表面的化学和生物环境中导航。它们在饥饿或对物理和化学刺激作出反应时游泳。鞭毛驱动的趋化性在细菌中已经成为信号转导和细胞决策的范例。通过改变运动性，细菌游向营养丰富的环境，运动由它们的趋化系统调节，并增加了用于表面运动的皮利。化学感受器的数量和类型反映了细菌的生态位和生活方式，那些适应复杂环境的细菌具有不同的代谢能力，在其基因组中编码更多的化学感受器。α-变形菌是后一种情况的典型代表，土壤细菌如根瘤菌、豆科植物的内共生体，其中运动性和趋化性对于竞争性共生起始以及其他过程是必不可少的。本文综述了苜蓿中华根瘤菌（Sinorhizobium meliloti）、蚕豆农杆菌（Agrobacterium fabacearum）、豆科根瘤菌（Rhizobium leguminosarum）、茎瘤固氮根瘤菌（Azorhizobium caulinodans）、巴西固氮根瘤菌（Azotellum brasilense）和重氮慢生根瘤菌（Bradyrhizobium diazoefficiens）等6种模式土壤细菌的运动性和趋化性。虽然运动和趋化系统有一个保守的核心，根瘤菌拥有几个修改，优化其在土壤和根表面环境中的运动。土壤为微生物的流动性提供了独特的挑战，因为通过颗粒的水通道并不总是连续的，特别是在干燥的条件下。共生体接种剂在田间环境中的有效性依赖于它们在土壤中的流动性和分散性，通常由水渗透或大型生物体运动或网络辅助。因此，本文综述了考虑和测试根瘤菌的运动性和趋化性的因素，任何潜在的接种。
Bacteria navigate their way often as individual cells through their chemical and biological environment in aqueous medium or across solid surfaces. They swim when starved or in response to physical and chemical stimuli. Flagella-driven chemotaxis in bacteria has emerged as a paradigm for both signal transduction and cellular decision-making. By altering motility, bacteria swim toward nutrient-rich environments, movement modulated by their chemotaxis systems with the addition of pili for surface movement. The numbers and types of chemoreceptors reflect the bacterial niche and lifestyle, with those adapted to complex environments having diverse metabolic capabilities, encoding far more chemoreceptors in their genomes. The Alpha-proteobacteria typify the latter case, with soil bacteria such as rhizobia, endosymbionts of legume plants, where motility and chemotaxis are essential for competitive symbiosis initiation, among other processes. This review describes the current knowledge of motility and chemotaxis in six model soil bacteria: Sinorhizobium meliloti, Agrobacterium fabacearum, Rhizobium leguminosarum, Azorhizobium caulinodans, Azospirillum brasilense, and Bradyrhizobium diazoefficiens. Although motility and chemotaxis systems have a conserved core, rhizobia possess several modifications that optimize their movements in soil and root surface environments. The soil provides a unique challenge for microbial mobility, since water pathways through particles are not always continuous, especially in drier conditions. The effectiveness of symbiont inoculants in a field context relies on their mobility and dispersal through the soil, often assisted by water percolation or macroorganism movement or networks. Thus, this review summarizes the factors that make it essential to consider and test rhizobial motility and chemotaxis for any potential inoculant.
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影响因子：
3.2
作者：
Bible, Amber;Russell, Matthew H.;Alexandre, Gladys
通讯作者：
Alexandre, Gladys
根瘤菌趋化剂，豆类共生体的味道和偏好。
影响因子：
5.6
作者：
Compton KK;Scharf BE
通讯作者：
Scharf BE
影响因子：
3.2
作者：
Eggenhofer, E;Rachel, R;Scharf, B
通讯作者：
Scharf, B
影响因子：
5.6
作者：
Fujii, Mikako;Shibata, Satoshi;Aizawa, Shin-Ichi
通讯作者：
Aizawa, Shin-Ichi
影响因子：
3.1
作者：
Belyakov, Alexei Ye.;Burygin, Gennady L.;Shchyogolev, Sergei Yu.
通讯作者：
Shchyogolev, Sergei Yu.