Mitigation of arsenic toxicity in wheat by the inoculation of methyltransferase containing Pseudomonas oleovorans NBRI-B4.10

IF 4.1 2区 环境科学与生态学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY International Biodeterioration & Biodegradation Pub Date : 2024-07-06 DOI:10.1016/j.ibiod.2024.105851
Pallavi Singh , Vandana Anand , Jasvinder Kaur , Sonal Srivastava , Satish K. Verma , Abhishek Niranjan , Pankaj Kumar Srivastava , Suchi Srivastava
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Abstract

Arsenic (As) pollution in croplands is a significant global environmental issue. Being the dominant irrigated crop, rice is the main focus for research related to arsenic toxicity, however, wheat being the basic staple food has not been studied well. Therefore, the present study sought to investigate the potential of arsenic-tolerant rhizobacteria for its mitigation in wheat. Ten As tolerant bacterial strains were characterized for abiotic stress tolerance, antibiotic resistance, and plant growth-promoting traits. Methyltransferase containing Pseudomonas oleovorans (NBRI-B4.10) with a better arsenic tolerance index (151.74%) in wheat outperformed the other strains. In vitro study, showed the highest phosphate solubilization ability (40.17 μgmL−1) under As+5 (250 μgmL−1) stressed condition in NBRI-P media, accompanied with more As biosorption (72.9%) in culture pellet, confers the As detoxification ability of B4.10 during arsenic-phosphate (As–P) interaction too. Organic acid production studied during the process of P-solubilization by methyltransferase bacteria, NBRI-B4.10 reveals the production of higher concentrations of gluconic and tartaric acid at As+5 (25 μgmL−1) stress. Furthermore, NBRI-B4.10 inoculation increased the plant growth and nutrient content (Se) while decreasing As content in grain (∼53.3%) leading to arsenic abatement in wheat.

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通过接种含甲基转移酶的油绿假单胞菌 NBRI-B4.10 减轻小麦的砷毒性
耕地中的砷(As)污染是一个重大的全球环境问题。作为主要的灌溉作物,水稻是砷中毒研究的重点,但作为基本主食的小麦却没有得到很好的研究。因此,本研究试图调查耐砷根瘤菌在缓解小麦砷毒性方面的潜力。研究人员对 10 株耐砷细菌进行了非生物胁迫耐受性、抗生素抗性和植物生长促进性状鉴定。研究发现,在 NBRI-P 培养基中,含有甲基转移酶(NBRI-B4.10)的小麦耐砷指数(151.74%)优于其他菌株,在砷(250 微克/毫升)胁迫条件下,B4.10 的磷酸盐溶解能力最高(40.17 微克/毫升),同时培养颗粒对砷的生物吸附能力也较强(72.9%),这说明 B4.10 在砷-磷相互作用过程中也具有砷解毒能力。在甲基转移酶细菌溶解 P 的过程中,对有机酸产量的研究表明,NBRI-B4.10 在砷(25 μgmL)胁迫下能产生较高浓度的葡萄糖酸和酒石酸。此外,NBRI-B4.10 的接种增加了植物的生长和养分含量(Se),同时降低了谷物中的砷含量(53.3%),从而减少了小麦中的砷含量。
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来源期刊
CiteScore
9.60
自引率
10.40%
发文量
107
审稿时长
21 days
期刊介绍: International Biodeterioration and Biodegradation publishes original research papers and reviews on the biological causes of deterioration or degradation.
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