数字农科院2.0

Plant Growth-Promoting Rhizobacteria Isolated From Natural Habitats Promote the Growth of Elymus sibiricus and Enhance Its Resistance to Abiotic Stress

文献类型： 外文期刊

作者： Liang, Ruiqi;Zhong, Li;Huang, Zeyao;Wang, Weixia;Lu, Guangxin;Zhu, Tingheng

作者机构：

关键词： abiotic stress;Bacillus mycoides;Elymus sibiricus;IAA;PGPR;plant growth promoting

期刊名称： PLANTENVIRONMENT INTERACTIONS

ISSN： 2575-6265

年卷期： 2025 年 6 卷 6 期

页码：

收录情况： 无来源刊（2025版）

摘要： Elymus sibiricus L., a perennial tufted herbaceous species native to the Qinghai-Tibet Plateau, serves as a crucial forage resource and plays a vital role in ecological restoration of degraded vegetation. To discover beneficial microorganisms that promote its growth and enhance its stress resistance, this study isolated two novel Plant Growth-Promoting Rhizobacteria (PGPR) strains, Bacillus mycoides GN-1 and Bacillus sp. MQ-5 from rhizospheric soils of wild E.sibiricus populations on the Qinghai-Tibet Plateau. Both strains demonstrated plant growth-promoting traits, including indole-3-acetic acid (IAA) synthesis and siderophore production. In pot experiments, MQ-5 treatment increased aboveground fresh biomass by 25.90% (p < 0.05), increased root biomass by 270.51% (p < 0.001), while GN-1 treatment increased 19.29% (p < 0.05) and 54.38% (p < 0.001), respectively, compared to the control. Furthermore, MQ-5 alleviated salinity and drought stress in E. sibiricus, highlighting its potential for improving forage productivity and resilience in fragile high-altitude ecosystems.

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