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Bacterial endophyte mediated plant tolerance to salinity: growth responses and mechanisms of action

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Abstract

Salinity stress is one of the key constraints for sustainable crop production. It has gained immense importance in the backdrop of climate change induced imbalanced terrestrial water budgets. The traditional agronomic approaches and breeding salt-tolerant genotypes have often proved insufficient to alleviate salinity stress. Newer approaches like the use of bacterial endophytes associated with agricultural crops have occupied center place recently, owing to their advantageous role in improving crop growth, health and yield. Research evidences have revealed that bacterial endophytes can promote plant growth by accelerating availability of mineral nutrients, helping in production of phytohormones, siderophores, and enzymes, and also by activating systemic resistance against insect pest and pathogens in plants. These research developments have opened an innovative boulevard in agriculture for capitalizing bacterial endophytes, single species or consortium, to enhance plant salt tolerance capabilities, and ultimately lead to translational refinement of crop-production business under salty environments. This article reviews the latest research progress on the identification and functional characterization of salt tolerant endophytic bacteria and illustrates various mechanisms triggered by them for plant growth promotion under saline environment.

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Authors and Affiliations

  1. ICAR-National Bureau of Agriculturally Important Microorganisms (NBAIM), Uttar Pradesh, Mau, 275103, India

    Prity Kushwaha, Pandiyan Kuppusamy & Alok Kumar Srivastava

  2. ICAR-Indian Institute of Wheat and Barley Research (IIWBR), Karnal, 132001, India

    Prem Lal Kashyap

  3. ICAR-Central Soil Salinity Research Institute (CSSRI), Karnal, 132001, India

    Ajay Kumar Bhardwaj

  4. AMITY University, Uttar Pradesh Lucknow Campus, Malhaur, Gomti Nagar Extension, Lucknow, 227105, India

    Rajesh Kumar Tiwari

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  1. Prity Kushwaha
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Kushwaha, P., Kashyap, P.L., Bhardwaj, A.K. et al. Bacterial endophyte mediated plant tolerance to salinity: growth responses and mechanisms of action. World J Microbiol Biotechnol 36, 26 (2020). https://doi.org/10.1007/s11274-020-2804-9

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