Plant growth-promoting rhizobacteria Halomonas alkaliantarcticae M23 promotes the salt tolerance of maize by increasing the K⁺/Na⁺ ratio, antioxidant levels, and ABA levels and changing the rhizosphere bacterial community.

ABSTRACT:

Background

Soil salinity is a global issue threatening crop growth and yield. Salt-tolerant plant growth-promoting rhizobacteria (PGPB) can survive in high-salinity environments and help plants adapt to stress, thus serving as an effective measure to mitigate salt stress.

Results

In this study, a salt-tolerant plant growth-promoting bacterium, Halomonas alkaliantarcticae M23 (M23), was isolated from the rhizosphere soil of the salt-tolerant plant Suaeda salsa. This study characterized the effects of M23 on maize growth, salt stress response, and the composition and structure of rhizosphere soil microorganisms, and preliminary explained the mechanism by which M23 enhances maize salt tolerance. M23 can tolerate up to 14% NaCl, produce auxin, and exhibit the ability to absorb N

SUBMITTER: Liu J 

PROVIDER: S-EPMC12121225 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature