How Do Plant Growth-Promoting Bacteria Use Plant Hormones to Regulate Stress Reactions?

Phytohormones play a crucial role in regulating growth, productivity, and development while also aiding in the response to diverse environmental changes, encompassing both biotic and abiotic factors. Phytohormone levels in soil and plant tissues are influenced by specific soil bacteria, leading to d...

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Bibliographic Details
Published in:Plants (Basel) 2024-08, Vol.13 (17), p.2371
Main Authors: Timofeeva, Anna M, Galyamova, Maria R, Sedykh, Sergey E
Format: Article
Language:English
Subjects:
Abiotic factors
Abscisic acid
auxin
Bacteria
Biofertilizers
Biosynthesis
Crops
Cultivated plants
cytokinins
Drought
Environmental changes
Fertilizers
Heavy metals
Hormones
Microorganisms
Mutants
Nitrogen
Organic compounds
Organic soils
PGPB
Physiology
Phytohormones
Plant growth
plant growth stimulation
Plant layout
Plant tissues
Saline soils
Soil bacteria
Soil microorganisms
Soil pollution
Soil stresses
Sustainable agriculture
VOCs
Volatile organic compounds
Wheat
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Summary:Phytohormones play a crucial role in regulating growth, productivity, and development while also aiding in the response to diverse environmental changes, encompassing both biotic and abiotic factors. Phytohormone levels in soil and plant tissues are influenced by specific soil bacteria, leading to direct effects on plant growth, development, and stress tolerance. Specific plant growth-promoting bacteria can either synthesize or degrade specific plant phytohormones. Moreover, a wide range of volatile organic compounds synthesized by plant growth-promoting bacteria have been found to influence the expression of phytohormones. Bacteria-plant interactions become more significant under conditions of abiotic stress such as saline soils, drought, and heavy metal pollution. Phytohormones function in a synergistic or antagonistic manner rather than in isolation. The study of plant growth-promoting bacteria involves a range of approaches, such as identifying singular substances or hormones, comparing mutant and non-mutant bacterial strains, screening for individual gene presence, and utilizing omics approaches for analysis. Each approach uncovers the concealed aspects concerning the effects of plant growth-promoting bacteria on plants. Publications that prioritize the comprehensive examination of the private aspects of PGPB and cultivated plant interactions are of utmost significance and crucial for advancing the practical application of microbial biofertilizers. This review explores the potential of PGPB-plant interactions in promoting sustainable agriculture. We summarize the interactions, focusing on the mechanisms through which plant growth-promoting bacteria have a beneficial effect on plant growth and development via phytohormones, with particular emphasis on detecting the synthesis of phytohormones by plant growth-promoting bacteria.
ISSN:2223-7747
2223-7747
DOI:10.3390/plants13172371