Groundwater inhabited Bacillus and Paenibacillus strains alleviate arsenic-induced phytotoxicity of rice plant. Issue 10 (23rd August 2020)

• Record Type: Journal Article
• Authors: Banerjee, Adrita; Hazra, Anjan; Das, Sauren; Sengupta, Chandan
• Is Part Of: International journal of phytoremediation. Volume 22:Issue 10(2020)
• Page Start: 1048
• Page End: 1058
• Publication Date: 2020-08-23
• Subjects: Antioxidants -- arsenic -- arsenic-tolerant microbes -- oxidative stress -- plant growth promotion; Phytoremediation -- Periodicals; 628.5
• DOI: 10.1080/15226514.2020.1725871
• Languages: English
• ISSNs: 1522-6514

Abstract

Abstract: 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.