PGPR调控植物响应逆境胁迫的作用机制
摘要：
盐碱、干旱等非生物胁迫是限制植物生长和产量的重要环境因子。植物根际促生菌（PGPR）是一类定殖于植物根系的有益微生物，利用其生物学功能制成的生物菌剂具有低成本、高效和环保等优点，不仅可促进植物生长与作物产量，还能提高植物对非生物胁迫的耐受性。本研究对PGPR定义和种类、生物学功能及其在植物响应盐碱、干旱、高低温及重金属等非生物胁迫中的作用加以综述，并对其未来研究方向进行展望，以期为今后PGPR介导植物抗逆性的研究与生物菌剂的开发和应用提供理论支撑。
关键词: 植物根际促生菌, 固氮菌, 溶磷菌, 植物激素, 非生物胁迫, 抗逆性
Abstract:
Salt alkali， drought and other abiotic stresses are important environmental factors that limit plant growth and yield. Plant growth promoting rhizobacteria （PGPR）， as beneficial microorganisms colonizing plant roots， have been shown to have a capacity for use as biological agents， thereby harnessing their functions for human benefit. This methodology has advantages compared to traditional agricultural chemicals， including low cost， high efficiency， and environmental protection. PGPR have been documented to not only promote plant growth and crop yield， but also to significantly improve the tolerance of plants to abiotic stress. In this study， the definition and types of PGPR， their biological functions and their role in plant response to abiotic stress such as salinity， drought， high and low temperature， and heavy metals were reviewed， and future research directions were also explored. The results from this study provide a foundation for further research on PGPR mediated plant stress resistance and the development and application of these biological agents.
Key words: plant growth promoting rhizobacteria, nitrogen-fixing bacteria, phosphate-solubilizing bacteria, phytohormone, abiotic stress, stress resistance
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