Mycorrhizal helper bacteria further promote mycorrhizal fungi to improve cold tolerance in rice seedlings: evidence from oxidative stress, osmoregulation, photosynthesis, and related genes in rice.

ABSTRACT:

Introduction

Cold stress critically threatens rice productivity, necessitating innovative strategies to enhance seedling resilience. While arbuscular mycorrhizal fungi (AMF) and associated bacteria synergistically improve plant stress tolerance, their collaborative mechanisms in rice cold adaptation remain underexplored.

Methods

Here, we developed a composite inoculant combining Rhizophagus intraradices (Ri) with Agrobacterium rhizogenes (Ar) and Bacillus subtilis (Bs) to investigate their synergistic effects under graded cold stress (25-4 °C).

Results

The Ri+Ar+Bs (RAB) consortium elevated mycorrhizal colonization by 17% (reaching 87.5%) and synergistically promoted plant growth, increasing height and root length by 9.56% and 43.7%, respectively,

SUBMITTER: Shi F 

PROVIDER: S-EPMC12572616 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature