干旱使厚壁菌门和放线菌数量增加，盐胁迫增加了拟杆菌门的数量，热胁迫扩大了耐热菌的优势 . 

Rhizobacteria-Mediated Plant Resilience to Abiotic Stresses: Drought, Salinity, and Heat

摘要

（1）The frequent occurrence of drought, salinity and heat disasters due to global climate change has become a problem that cannot be ignored and seriously restricts food security and sustainable agricultural development. 全球气候变化导致的干旱、盐碱和高温灾害频繁发生，已成为一个不容忽视的问题，严重制约着粮食安全和农业可持续发展。

（2）The role of rhizobacteria in the response of plants to abiotic stress has an important guiding significance in improving plant growth. 根际细菌在植物响应非生物胁迫中的作用对促进植物生长具有重要的指导意义。 

（3）This paper summarizes the response of plant rhizosphere microbial communities to abiotic stress, analyzes the mechanism by which rhizosphere-related bacteria assist plants to resist abiotic stress, and expounds on the interaction between soil physical and chemical properties, the plant root metabolome, and the rhizosphere microbiome under abiotic stress 植物根际微生物群落对非生物胁迫的响应，分析了根际相关细菌帮助植物抵抗非生物胁迫的机制，阐述了非生物胁迫下土壤理化性质、植物根系代谢组和根际微生物组之间的相互作用 . 

（4）This review systematically summarizes the core roles and mechanisms of rhizobacteria in plants' defense against abiotic stress. Stress reshapes the rhizosphere microecology, with drought enriching Firmicutes and Actinobacteria, salt stress increasing Bacteroidetes abundance, and heat stress expanding the dominance of thermotolerant bacteria 本文系统总结了根际细菌在植物防御非生物胁迫中的核心作用和机制。胁迫重塑了根际微生态，干旱使厚壁菌门和放线菌数量增加，盐胁迫增加了拟杆菌门的数量，热胁迫扩大了耐热菌的优势 . 

（5）Microbial diversity and network structure undergo adaptive reorganization. Streptomyces and Bacillus, as the twin stars aiding plants in enhancing stress resistance, provide medium- to long-term protection through rich secondary metabolites and mycelial networks, while Bacillus achieves acute responses via rapid spore germination, signal induction, and nutrient competition. 微生物多样性和网络结构经历适应性重组。链霉菌和芽孢杆菌作为帮助植物增强抗逆性的双星，通过丰富的次生代谢产物和菌丝网络提供中长期保护，而芽孢杆菌通过快速孢子萌发、信号诱导和营养竞争实现急性反应。

（6）Rhizobacteria improve soil nutrient availability by regulating carbon, nitrogen, and phosphorus cycles, secreting organic acids and enzymes, and induce plant osmotic adjustment, antioxidant, and anti-ethylene signaling networks through extracellular polysaccharides, volatile organic compounds, plant hormones, and 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase pathways, thereby systematically enhancing the host's water use efficiency and membrane stability. 根际细菌通过调节碳、氮和磷循环，分泌有机酸和酶来提高土壤养分的可用性，并通过胞外多糖、挥发性有机化合物、植物激素和1-氨基环丙烷-1-羧酸(ACC)脱氨酶途径诱导植物渗透调节、抗氧化和抗乙烯信号网络，从而系统地提高宿主的水分利用效率和膜稳定性。  

（7）Future research should integrate multi-omics and field validation to precisely construct rhizosphere bacterial communities, providing theoretical basis and technical routes for green agriculture. 未来的研究应结合多组学和田间验证，精确构建根际细菌群落，为绿色农业提供理论依据和技术路线。

（8）Result

（9）The Pivotal Role of Rhizobacteria in Plant Rhizosphere Soil Microecology 根际细菌在植物根际土壤微生态中的关键作用

图1： 根际微生物诱导植物生长环境因子适应水分胁迫的模式图。

简单来说，这张图描绘了在干旱（水分胁迫）条件下，根际的有益细菌是如何通过一系列“手段”，帮助植物“扛过去”的。

（10） Changes in Rhizosphere Microbial Communities Under Abiotic Stress 非生物胁迫下根际微生物群落的变化

（11） Twin Stars—Streptomyces and Bacillus 双星——链霉菌和芽孢杆菌

 链霉菌和芽孢杆菌缓解植物干旱胁迫的比较。胞外多糖、胞外多糖、挥发性有机化合物、挥发性有机化合物。

（12） Rhizosphere Microorganisms Participate in the Regulation of Soil Physicochemical Properties Under Abiotic Stress 非生物胁迫下根际微生物参与土壤理化性质的调节

（13） Effect of Abiotic Stress on Plant Rhizosphere Soil Nutrients 非生物胁迫对植物根际土壤养分的影响

（14） Linkage Between Soil Physical and Chemical Properties and Microbial Community Structure 土壤理化性质与微生物群落结构的联系

（15） Rhizobacteria Assist Host Plants in Resisting Abiotic Stress 根际细菌帮助宿主植物抵抗非生物胁迫

根际微生物增强植物耐旱性的分子和生理机制。

根际微生物（如芽孢杆菌、链霉菌等）会分泌一些物质，这些物质被植物根系感知后，会触发植物体内一系列复杂的信号传递，最终导致植物在基因水平和生理水平上做出适应性改变，从而增强抗旱能力。根际微生物通过“表观遗传调控”和“代谢物生产”两大途径，从分子和生理层面系统性地增强植物的耐旱性。

根际细菌帮助植物抵抗高温、干旱、盐碱这三种主要非生物胁迫时，既有共性的“通用策略”，也有针对每种胁迫的“专属招数

（16） Interaction Between Rhizosphere Microbiome and Plant Metabolome Under Abiotic Stress 非生物胁迫下根际微生物与植物代谢组的相互作用

（17） The Mitigation Mechanism of Synergistic Negative Effects of Combined Abiotic Stresses by Rhizobacteria 根际细菌缓解复合非生物胁迫协同负面效应的机制

The frequent occurrence of drought, salinity and heat disasters due to global climate change has become a problem that cannot be ignored and seriously restricts food security and sustainable agricultural development.