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Título
Overview of the role of rhizobacteria in plant salt stress tolerance
Autor(es)
Materia
Salinity
PGPB
Climate change
Osmotic stress
Ion homeostasis
Phytohormones
Osmoprotectan
Crops
Clasificación UNESCO
2414 Microbiología
Fecha de publicación
2021
Editor
MDPI
Citación
Ayuso-Calles, M., Flores-Félix, J. D., & Rivas, R. (2021). Overview of the role of rhizobacteria in plant salt stress tolerance. Agronomy, 11(9), 1759. https://doi.org/10.3390/agronomy11091759
Resumen
[EN]Salinity is one of the main causes of abiotic stress in plants, resulting in negative effects
on crop growth and yield, especially in arid and semi-arid regions. The effects of salinity on
plant growth mainly generate osmotic stress, ion toxicity, nutrient deficiency, and oxidative stress.
Traditional approaches for the development of salt-tolerant crops are expensive and time-consuming,
as well as not always being easy to implement. Thus, the use of plant growth-promoting bacteria
(PGPB) has been reported as a sustainable and cost-effective alternative to enhance plant tolerance
to salt stress. In this sense, this review aims to understand the mechanisms by which PGPB help
plants to alleviate saline stress, including: (i) changes in the plant hormonal balance; (ii) release of
extracellular compounds acting as chemical signals for the plant or enhancing soil conditions for plant
development; (iii) regulation of the internal ionic content of the plant; or iv) aiding in the synthesis
of osmoprotectant compounds (which reduce osmotic stress). The potential provided by PGPB is
therefore an invaluable resource for improving plant tolerance to salinity, thereby facilitating an
increase in global food production and unravelling prospects for sustainable agricultural productivity.
URI
DOI
10.3390/agronomy11091759
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