Arsenic contamination in agricultural soil now imposing a major threat to crop productivity and causing several hazardous health effects through percolation in food chain. Bioremediation, an efficient way of soil health restoration toward sustainability offered by some soil-borne microorganisms, has been reported. The present work deals with application of two potent arsenic-tolerant bacterial strains (Bacillus thuringiensis A01 and Paenibacillus glucanolyticus B05), obtained from natural sources in modulating overall growth and antioxidant defense against arsenic-treated rice plants. Between the two, former could reduce arsenic uptake up to 56% (roots) and 85% (shoots), and the preceding one up to 31% (roots) and 65% (shoots) in a hydroponic environment. Germination percentage was noted to be enhanced significantly (p ≤ 0.05). Expression of oxidative stress defensive enzymes such as superoxide dismutase, peroxidase and catalase have been augmented at seedling stages (21 days) toward detoxification of arsenic imposed excess ROS generation. Increment of leaf Thiobarbituric acid reactive substances due to arsenic exposure have been ameliorated by both the bacterial application. Phenolic and flavonoid mediated free radical scavenging ability of the test plants elevated significantly (p ≤ 0.05). The present work revealed that, selected bacterial strains can perform efficient bioremediation against arsenic pollutant rice cultivation.

现在，农业土壤中的砷污染严重威胁着作物的生产力，并通过食物链中的渗透而对健康产生了一些有害影响。据报道，生物修复是土壤健康微生物恢复土壤健康以实现可持续性的一种有效方法。本工作涉及两种有效的耐砷细菌菌株（苏云金芽孢杆菌A01和葡糖酸杆菌）的应用。B05），得自自然来源，可调节整体生长和抗砷处理的水稻植株的抗氧化防御能力。在两者之间，前者可以在水培环境中减少高达56％（根）和85％（芽）的砷吸收，而前者可以减少31％（根）和65％（芽）的砷吸收。注意到发芽率显着提高（p ≤0.05）。氧化胁迫防御酶（如超氧化物歧化酶，过氧化物酶和过氧化氢酶）的表达已在幼苗阶段（21天）增加，从而使砷解毒，产生了过量的ROS。两种细菌的​​施用都改善了由于砷暴露引起的叶硫巴比妥酸反应性物质的增加。酚和类黄酮介导显著升高试验植物（的自由基清除能力p  ≤0.05）。目前的工作表明，选定的细菌菌株可以有效地对砷污染的水稻栽培进行生物修复。