Saline-Alkaline Stress-Driven Rhizobacterial Community Restructuring and Alleviation of Stress by Indigenous PGPR in Alfalfa.

ABSTRACT:

Background

The Songnen Plain in China contains soda saline-alkaline soil, wherein salinity and alkalinity severely constrain crop productivity. Alfalfa (Medicago sativa L.) is a forage legume that has adapted to moderate saline-alkaline conditions, but how its rhizosphere microbial community facilitated this adaptation remains unclear.

Methods

Using 16S rRNA gene sequencing, we compared alfalfa rhizosphere bacteria in saline-alkaline soil (AS) and control soil. Bacteria isolated from AS were screened for plant growth-promoting traits, with the most effective strains validated in pot experiments involving 50 mM NaHCO₃.

Results

Compared with the control soil bacterial community, the AS bacterial community was significantly enriched with Methylomirabilo

SUBMITTER: Wang M 

PROVIDER: S-EPMC12737148 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature