Mitigation of Salt Stress in Rice by the Halotolerant Plant Growth-Promoting Bacterium Enterobacter asburiae D2

Ning, Zican; Lin, Kexin; Gao, Mengya; Han, Xiao; Guan, Qingjie; Ji, Xiang; Yu, Shuyu; Lu, Lei

doi:10.3390/jox14010021

Cited by 2 publications

(1 citation statement)

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“…Enterobacter asburiae strain D2 has the ability to produce 1–aminocyclop ropane–1–carboxylate (ACC) deaminase, indole−3−acetic acid (IAA), and siderophore, as well as to solubilize phosphate. It may alleviate the impacts of saline–alkali stress on rice [ 24 ]. Bacillus subtilis has been found to enhance crop saline–alkali stress tolerance by preventing excessive sodium accumulation and enhancing nutrient absorption.…”

Section: Introductionmentioning

confidence: 99%

Bacillus altitudinis AD13−4 Enhances Saline–Alkali Stress Tolerance of Alfalfa and Affects Composition of Rhizosphere Soil Microbial Community

Khoso,

Wang,

Zhou

et al. 2024

IJMS

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Saline and alkaline stresses limit plant growth and reduce crop yield. Soil salinization and alkalization seriously threaten the sustainable development of agriculture and the virtuous cycle of ecology. Biofertilizers made from plant growth−promoting rhizobacteria (PGPR) not only enhance plant growth and stress tolerance, but also are environmentally friendly and cost-effective. There have been many studies on the mechanisms underlying PGPRs enhancing plant salt resistance. However, there is limited knowledge about the interaction between PGPR and plants under alkaline–sodic stress. To clarify the mechanisms underlying PGPR’s improvement of plants’ tolerance to alkaline–sodic stress, we screened PGPR from the rhizosphere microorganisms of local plants growing in alkaline–sodic land and selected an efficient strain, Bacillus altitudinis AD13−4, as the research object. Our results indicate that the strain AD13−4 can produce various growth-promoting substances to regulate plant endogenous hormone levels, cell division and differentiation, photosynthesis, antioxidant capacity, etc. Transcriptome analysis revealed that the strain AD13−4 significantly affected metabolism and secondary metabolism, signal transduction, photosynthesis, redox processes, and plant–pathogen interactions. Under alkaline–sodic conditions, inoculation of the strain AD13−4 significantly improved plant biomass and the contents of metabolites (e.g., soluble proteins and sugars) as well as secondary metabolites (e.g., phenols, flavonoids, and terpenoids). The 16S rRNA gene sequencing results indicated that the strain AD13−4 significantly affected the abundance and composition of the rhizospheric microbiota and improved soil activities and physiochemical properties. Our study provides theoretical support for the optimization of saline–alkali-tolerant PGPR and valuable information for elucidating the mechanism of plant alkaline–sodic tolerance.

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Section: Introductionmentioning

confidence: 99%