Bacillus altitudinis Mediated Lead Bioremediation for Enhanced Growth of Rice Seedlings.

IF 2.6 3区生物学 Q3 MICROBIOLOGY Current Microbiology Pub Date : 2024-10-16 DOI:10.1007/s00284-024-03934-z

Priya Kaushal, Aparna Maitra Pati

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Abstract

Lead (Pb) is a hazardous environmental pollutant that threatens soil health, water quality, and agricultural productivity. Plant growth-promoting rhizobacteria (PGPRs) mediated bioremediation is considered as an eco-friendly approach for agro-environmental sustainability. This study investigated the Pb bioremediation potential of Bacillus altitudinis (IHBT-705). The results revealed that IHBT-705 strain tolerated upto 15 mM of Pb, possessed 96% Pb bioaccumulation efficiency, and also maintained its plant growth-promoting (PGP) traits under Pb stress. Furthermore, IHBT-705 strain treated with 15 mM Pb solution (IHBT-W) and soil containing 15 mM Pb treated with IHBT-705 inoculum (IHBT-S) ameliorated the detrimental effects of Pb stress. Both IHBT-W and IHBT-S treatment significantly improved the shoot length, root length, total roots, chlorophyll content, and antioxidants enzyme activity of the rice seedlings as compared to the seedlings treated with 15 mM Pb solution (Pb-W) and soil containing 15 mM Pb (Pb-S). Also, IHBT-W and IHBT-S treatment decreased the Pb content in the rice plant by 97 and 96% over their respective Pb-W and Pb-S plants. Overall, our research underscores the remarkable Pb bioremediation potential of IHBT-705, offering a promising avenue for dual function, i.e. improving soil health and promoting plant growth under Pb contamination.

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高度芽孢杆菌介导的铅生物修复技术促进水稻秧苗生长

铅（Pb）是一种有害的环境污染物，威胁着土壤健康、水质和农业生产力。植物生长促进根瘤菌（PGPRs）介导的生物修复被认为是实现农业环境可持续性的一种生态友好型方法。本研究调查了高度芽孢杆菌（IHBT-705）的铅生物修复潜力。结果表明，IHBT-705 菌株可耐受高达 15 mM 的铅，具有 96% 的铅生物累积效率，并且在铅胁迫下仍能保持其促进植物生长（PGP）的特性。此外，用 15 mM 铅溶液（IHBT-W）处理的 IHBT-705 菌株和用 IHBT-705 接种物（IHBT-S）处理的含 15 mM 铅的土壤都能改善铅胁迫的不利影响。与 15 mM 铅溶液（Pb-W）和含 15 mM 铅的土壤（Pb-S）处理的秧苗相比，IHBT-W 和 IHBT-S 处理的秧苗在芽长、根长、总根、叶绿素含量和抗氧化酶活性方面都有明显改善。此外，IHBT-W 和 IHBT-S 处理使水稻植株中的铅含量分别比 Pb-W 和 Pb-S 植株降低了 97% 和 96%。总之，我们的研究强调了 IHBT-705 显著的铅生物修复潜力，为实现双重功能（即改善土壤健康和促进铅污染条件下的植物生长）提供了一条很有前景的途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Current Microbiology 生物-微生物学

CiteScore

4.80

自引率

3.80%

发文量

380

审稿时长

2.5 months

期刊介绍： Current Microbiology is a well-established journal that publishes articles in all aspects of microbial cells and the interactions between the microorganisms, their hosts and the environment. Current Microbiology publishes original research articles, short communications, reviews and letters to the editor, spanning the following areas: physiology, biochemistry, genetics, genomics, biotechnology, ecology, evolution, morphology, taxonomy, diagnostic methods, medical and clinical microbiology and immunology as applied to microorganisms.