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Role of Halotolerant Plant Growth-Promoting Rhizobacteria in Mitigating Salinity Stress: Recent Advances and Possibilities

Author

Listed:
  • Vikash Kumar

    (Faculty of Agricultural Science, GLA University, Mathura, Uttar Pradesh 281 406, India)

  • Nikhil Raghuvanshi

    (Department of Agriculture, Deen Dayal Upadhyaya Gorakhpur University, Gorakhpur, Uttar Pradesh 273 009, India)

  • Abhay K. Pandey

    (Department of Mycology and Microbiology, Tea Research Association-North Bengal Regional R & D Center, Nagrakata, West Bengal 735 225, India)

  • Abhishek Kumar

    (Department of Plant Pathology, Chaudhary Charan Singh Haryana Agriculture University, Hisar, Haryana 125 004, India)

  • Emily Thoday-Kennedy

    (Agriculture Victoria, Grains Innovation Park, Horsham, VIC 3400, Australia)

  • Surya Kant

    (Agriculture Victoria, Grains Innovation Park, Horsham, VIC 3400, Australia
    School of Applied Systems Biology, La Trobe University, Bundoora, VIC 3083, Australia)

Abstract

Soil salinity is one of the major abiotic constraints in agricultural ecosystems worldwide. High salinity levels have negative impacts on plant growth and yield, and affect soil physicochemical properties. Salinity also has adverse effects on the distribution and abundance of soil microorganisms. Salinity problems have previously been addressed in research, but most approaches, such as breeding for salt tolerant varieties and soil amelioration, are expensive and require years of efforts. Halotolerant plant growth-promoting rhizobacteria (HT-PGPR) secrete secondary metabolites, including osmoprotectants, exopolysaccharides, and volatile organic compounds. The importance of these compounds in promoting plant growth and reducing adverse effects under salinity stress has now been widely recognised. HT-PGPR are emerging as effective biological strategies for mitigating the harmful effects of high salinity; improving plant growth, development, and yield; and remediating degraded saline soils. This review describes the beneficial effects and growth-promoting mechanisms of various HT-PGPR, which are carried out by maintaining ion homeostasis, increasing nutrient availability, and the producing secondary metabolites, osmoprotectants, growth hormones, and volatile organic compounds. Exploring suitable HT-PGPR and applications in agriculture production systems can play a crucial role in reducing the adverse impacts of salinity stress and sustainable crop productivity.

Suggested Citation

  • Vikash Kumar & Nikhil Raghuvanshi & Abhay K. Pandey & Abhishek Kumar & Emily Thoday-Kennedy & Surya Kant, 2023. "Role of Halotolerant Plant Growth-Promoting Rhizobacteria in Mitigating Salinity Stress: Recent Advances and Possibilities," Agriculture, MDPI, vol. 13(1), pages 1-22, January.
    • Handle: RePEc:gam:jagris:v:13:y:2023:i:1:p:168-:d:1030265
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    References listed on IDEAS

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    1. F. Kunst & N. Ogasawara & I. Moszer & A. M. Albertini & G. Alloni & V. Azevedo & M. G. Bertero & P. Bessières & A. Bolotin & S. Borchert & R. Borriss & L. Boursier & A. Brans & M. Braun & S. C. Brigne, 1997. "The complete genome sequence of the Gram-positive bacterium Bacillus subtilis," Nature, Nature, vol. 390(6657), pages 249-256, November.
    2. Jing Pan & Fei Peng & Xian Xue & Quangang You & Wenjuan Zhang & Tao Wang & Cuihua Huang, 2019. "The Growth Promotion of Two Salt-Tolerant Plant Groups with PGPR Inoculation: A Meta-Analysis," Sustainability, MDPI, vol. 11(2), pages 1-14, January.
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    Cited by:

    1. Henderson Castelo Sousa & Geocleber Gomes de Sousa & Thales Vinícius de Araújo Viana & Arthur Prudêncio de Araújo Pereira & Carla Ingryd Nojosa Lessa & Maria Vanessa Pires de Souza & José Marcelo da S, 2023. "Bacillus aryabhattai Mitigates the Effects of Salt and Water Stress on the Agronomic Performance of Maize under an Agroecological System," Agriculture, MDPI, vol. 13(6), pages 1-20, May.

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