Abstract
The rapid increase in population and climate change is calling for sustainable methods to improve food production such as soil microbial management. Here we review the ecology and mechanisms of action of plant growth-promoting rhizobacteria. Rhizosphere comprises both symbiotic and non-symbiotic microorganisms that influence plant growth positively by their effect on mineral nutrient uptake and bioavailability. Plant growth-promoting rhizobacteria facilitate resource acquisition and modulate phytohormone levels. Indirect mechanisms include production of antibiotics, lytic enzymes and siderophores, competition to harmful organisms, regulation of ethylene production, and induced systemic resistance. Plant growth-promoting substances suppress plant pathogens through competition for nutrients and space. Application of plant growth-promoting rhizobacterial increases crop yields. Numerous plant growth-promoting rhizobacteria are already marketed and are actually replacing mineral fertilizers and pesticides.
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Abbreviations
- ACC:
-
1-amino cyclopropane-1-carboxylic acid
- DAPG:
-
2,4 diacetyl phloroglucinol
- IAA:
-
Indole Acetic Acid
- PGPR:
-
Plant Growth-Promoting Rhizobacteria
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Verma, A., Verma, S., Singh, M., Mudila, H., Saini, J.K. (2023). Ecology and Mechanisms of Plant Growth Promoting Rhizobacteria. In: Singh, N., Chattopadhyay, A., Lichtfouse, E. (eds) Sustainable Agriculture Reviews 60. Sustainable Agriculture Reviews, vol 60. Springer, Cham. https://doi.org/10.1007/978-3-031-24181-9_4
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