ArticleInternational microbiology : the official journal of the Spanish Society for Microbiology2026
Sundarbans-derived halotolerant Bacillus inaquosorum SWA3TU mitigates arsenic and lead stress in Oryza sativa L.
Article in International microbiology : the official journal of the Spanish Society for Microbiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The production of Oryza sativa L. (rice) in polluted agroecosystems is severely affected by arsenic (As) and lead (Pb) toxicity. This study evaluates the efficacy of a novel halotolerant Bacillus inaquosorum SWA3TU (NCBI GenBank Accession No.: PQ097957), isolated from Sundarbans mangrove soil, as a plant growth-promoting bacterium (PGPR) for alleviating individual As and Pb stress in the IR-64 rice cultivar. SWA3TU demonstrated tolerance to NaCl (up to 10%) and heavy metals (As and Pb up to 150 µg/mL), along with plant growth-promoting traits including IAA production, phosphate and zinc solubilization, siderophore secretion, nitrogen fixation, exopolysaccharide synthesis, and antifungal activity. Under hydroponic conditions at 12 µg/mL (selected concentration) of As and Pb, SWA3TU inoculation significantly reduced toxicity. Compared to stressed controls, it increased biomass by 45%-62%, root and shoot length by 42%-57%, and chlorophyll content by 72%-78%. Antioxidant enzyme activities were elevated under stress and reduced by 31%-43% following bacterial inoculation, indicating mitigation of oxidative stress. Additionally, H
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