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Rhizobium Leguminosarum: A Model Arsenic Resistant, Arsenite Oxidizing Bacterium Possessing Plant Growth Promoting Attributes

Aritri Laha1,2 * , Somnath Bhattacharyya2 , Sudip Sengupta3 , Kallol Bhattacharyya3 and Sanjoy GuhaRoy1

Corresponding author Email: lahaaritri@gmail.com

DOI: http://dx.doi.org/10.12944/CWE.16.1.09

The threat of arsenic (As) pollution has become serious and leading to opt of low-cost microbial remediation strategies.Some bacteria have the ability to resist As. A group of rhizosphere bacteria have the ability to absorb arsenic. So these bacteria may be a good candidate for arsenic bioremediation from contaminated environment. Our present study of identifying suitable rhizobacterial strains led to the isolation of As-tolerant strains from arsenic pollutedrhizospheric soils of lentil in West Bengal, India.The isolated rhizobacterial strain LAR-7 had a high MIC (minimum inhibitory concentration) towards arsenate (260 mM) and arsenite (27.5 mM) and transformed 39% of arenite to arsenate under laboratory condition. Further, the strain LAR-7 had enormous plant growth-promoting characteristics (PGP), as categorized by efficient ability to solubilize phosphate, siderophore production, production of indole acetic acid-like molecules, ACC deaminase production, and nodule formation under As stressed condition. Based on 16S rRNA homology the LAR-7 was identified as Rhizobium leguminosarum andemerged as the most potent strain for As decontamination and plant growth promoter under the stress environment of As.

Arsenic (As); As Transformation; Minimum Inhibitory Concentration; Phylogenetic Tree; Plant Growth Promotion; Rhizobium Leguminosarum

Copy the following to cite this article:

Laha A, Bhattacharyya S, Sengupta S, Bhattacharyya K, GuhaRoy S. Rhizobium Leguminosarum: A Model Arsenic Resistant, Arsenite Oxidizing Bacterium Possessing Plant Growth Promoting Attributes. Curr World Environ 2021;16(1). DOI:http://dx.doi.org/10.12944/CWE.16.1.09

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Laha A, Bhattacharyya S, Sengupta S, Bhattacharyya K, GuhaRoy S. Rhizobium Leguminosarum: A Model Arsenic Resistant, Arsenite Oxidizing Bacterium Possessing Plant Growth Promoting Attributes. Curr World Environ 2021;16(1). Available From : https://bit.ly/3cV9B8s

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