International Journal For Multidisciplinary Research

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Isolation, Screening, and Characterization of PGPR from Halophytic Rhizosphere

Author(s) Ms. Paragi Ramanikbhai Jadav, Dr. Neepa Dilipbhai Pandhi, Ms. Kinjal Rameshbhai Kavani
Country India
Abstract Climate change affects agricultural fields by facing many threats. Among them, salt stress is the major abiotic threat. To address this issue, salt-tolerant PGPRs have been used. They can create a symbiotic relationship with their host to increase salt tolerance capacity. A study evaluated the ability of salt-tolerant PGPR isolated from the 07 different halophyte rhizospheres from the Adri region of Junagadh district. A total of 198 bacterial isolates were isolated, with most being gram-positive, capsule-forming, non-spore-forming, and existing in single or chain cell arrangements. A salt tolerance test was carried out for screening up to 30% of NaCl concentrations. A total of 08 isolates could tolerate 30% NaCl concentration. These were selected for further studies. During pH tolerance, all 08 could tolerate pH up to 11, but none isolates could tolerate < 7 pH. Temperature tolerance record: 04 isolates were psychrophiles and 02 were thermotolerant. Further, 06 isolates produced IAA and 03 solubilized P, but none isolates solubilized Zn. Production of NH3, catalase activity, and HCN production was done by 05 isolates. AEND5 was identified as a potent isolate, demonstrating the potential of salt-tolerant PGPRs in reducing synthetic pesticide and fertilizer use in agriculture.
Keywords Halophytes, ST-PGPR, Salt tolerance, IAA production, P solubilization, Zn solubilization, NH3 production, Catalase activity, and HCN production.
Field Biology > Agriculture / Botany
Published In Volume 7, Issue 3, May-June 2025
Published On 2025-05-16
DOI https://doi.org/10.36948/ijfmr.2025.v07i03.44600
Short DOI https://doi.org/g9kfqh
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