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Ochrobactrum sp. NBRISH6 Inoculation Enhances Zea mays Productivity, Mitigating Soil Alkalinity and Plant Immune Response

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Abstract

Intensifying sodic land characterized by high alkaline pH is an incipient environmental hazard-limiting agricultural potential. In this study, we investigated the effects of plant growth-promoting bacteria Ochrobactrum sp. strain NBRISH6 on the growth and physiology of maize (Zea mays L.) grown under alkaline stress at two soil pH levels. Additionally, we also studied the effects of NBRISH6 on soil fertility parameters. A greenhouse experiment was designed using two live soils (pH 8.2 and 10.2) in earthen pots using maize as a host. Results revealed a significant increase in plant growth and a decrease in defense enzymes in both soil types due to NBRISH6 inoculation as compared to non-treated control. Furthermore, activities of all soil enzymes along with bacterial diversity increased in NBRISH6 treatment under normal as well as stressed conditions. In addition, field evaluation of NBRISH6 inoculation using maize was carried out under normal and alkaline conditions, which resulted in significant enhancement of all vegetative parameters as compared to respective controls. Therefore, the study suggested that Ochrobactrum sp. NBRISH6 can be used to develop a bioinoculant formulation to ameliorate abiotic stresses and enhanced crop productivity.

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Acknowledgements

The authors acknowledge the Director, CSIR-National Botanical Research Institute, for providing facilities and support during the study.

Funding

The authors acknowledge the Director, CSIR-National Botanical Research Institute for providing facilities and support during the study. This work is supported by in-house project (OLP116) funded by the Council of Scientific and Industrial Research, New Delhi, India.

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Authors and Affiliations

  1. Microbial Technologies Division, Council of Scientific and Industrial Research-National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226001, India

    Shashank Kumar Mishra, Sankalp Misra, Vijay Kant Dixit, Srishti Kar & Puneet Singh Chauhan

  2. Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India

    Puneet Singh Chauhan

  3. Faculty of Biosciences, Institute of Biosciences and Technology, Shri Ramswaroop Memorial University, Uttar Pradesh, Lucknow-Deva Road, Barabanki, 225003, India

    Sankalp Misra

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  1. Shashank Kumar Mishra
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PSC conceived and coordinated the research. SKM, SM, VKD, and SK conducted the experiments and analyzed the data. PSC, SKM, and SM wrote the manuscript. All authors read and approved the manuscript.

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Correspondence to Puneet Singh Chauhan.

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Mishra, S.K., Misra, S., Dixit, V.K. et al. Ochrobactrum sp. NBRISH6 Inoculation Enhances Zea mays Productivity, Mitigating Soil Alkalinity and Plant Immune Response. Curr Microbiol 80, 328 (2023). https://doi.org/10.1007/s00284-023-03441-7

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