Yuan Yuanyuan, Pang Shuyue, Niu Wenkang, Zhang Tingting, Ma Lei
College of Life Science, Shihezi University, Shihezi 832000, China.
Key Laboratory of Oasis Town and Mountain-Basin System Ecology of Bingtuan, Shihezi University, Shihezi 832000, China.
Microorganisms. 2025 Jul 27;13(8):1754. doi: 10.3390/microorganisms13081754.
is an important plant in desert ecosystems. Its seed-endophytic bacteria may play a critical role in plant growth and environmental adaptation processes. This study systematically analyzed the community composition and potential plant growth-promoting (PGP) functions of seed-endophytic bacteria associated with . The results showed that while the overall diversity of bacterial communities from different sampling sites was similar, significant differences were observed in specific functional genes and species abundances. Nine endophytic bacterial strains were isolated from the seeds, among which strain L7 exhibited phosphorus solubilizing capabilities, nitrogen fixing, IAA production, siderophore generation, and multi-hydrolytic enzyme activities. Additionally, the genomic sequencing of L7 revealed the key genes involved in plant growth promotion and environmental adaptation, including Na efflux systems, K transport systems, compatible solute synthesis genes, and the gene clusters associated with nitrogen metabolism, IAA synthesis, phosphate solubilization, and siderophore synthesis. Strain L7 exhibits salt and osmotic stress tolerance while promoting plant growth, providing a promising candidate for desert microbial resource utilization and plant biostimulant development.
是沙漠生态系统中的一种重要植物。其种子内生细菌可能在植物生长和环境适应过程中发挥关键作用。本研究系统分析了与相关的种子内生细菌的群落组成和潜在的植物生长促进（PGP）功能。结果表明，虽然不同采样地点细菌群落的总体多样性相似，但在特定功能基因和物种丰度上观察到显著差异。从种子中分离出9株内生细菌菌株，其中菌株L7表现出解磷能力、固氮、吲哚乙酸（IAA）产生、铁载体生成和多种水解酶活性。此外，L7的基因组测序揭示了参与植物生长促进和环境适应的关键基因，包括钠外流系统、钾转运系统、相容性溶质合成基因以及与氮代谢、IAA合成、磷溶解和铁载体合成相关的基因簇。菌株L7在促进植物生长的同时表现出耐盐和耐渗透胁迫能力，为沙漠微生物资源利用和植物生物刺激剂开发提供了一个有前景的候选菌株。
