Metagenomic and proteomic insights into the self-adaptive cell surface hydrophobicity of Sphingomonas sp. strain PAH02 reducing the migration of cadmium-phenanthrene co-pollutant in rice
文献类型: 外文期刊
第一作者: Yi, Shengwei
作者: Yi, Shengwei;Zhu, Zhongnan;Li, Feng;Wu, Chen;Ge, Fei;Tian, Jiang;Yi, Shengwei;Zhu, Zhongnan;Li, Feng;Wu, Chen;Ge, Fei;Tian, Jiang;Yi, Shengwei;Zhu, Zhongnan;Li, Feng;Wu, Chen;Ge, Fei;Tian, Jiang;Zhu, Lizhong;Ji, Xionghui;Li, Feng
作者机构:
期刊名称:ENVIRONMENTAL MICROBIOLOGY ( 影响因子:5.1; 五年影响因子:5.8 )
ISSN: 1462-2912
年卷期: 2024 年 26 卷 1 期
页码:
收录情况: SCI
摘要: Cell surface hydrophobicity (CSH) dominates the interactions between rhizobacteria and pollutants at the soil-water interface, which is critical for understanding the dissipation of pollutants in the rhizosphere microzone of rice. Herein, we explored the effects of self-adaptive CSH of Sphingomonas sp. strain PAH02 on the translocation and biotransformation behaviour of cadmium-phenanthrene (Cd-Phe) co-pollutant in rice and rhizosphere microbiome. We evidenced that strain PAH02 reduced the adsorption of Cd-Phe co-pollutant on the rice root surface while enhancing the degradation of Phe and adsorption of Cd via its self-adaptive CSH in the hydroponic experiment. The significant upregulation of key protein expression levels such as MerR, ARHDs and enoyl-CoA hydratase/isomerase, ensures self-adaptive CSH to cope with the stress of Cd-Phe co-pollutant. Consistently, the bioaugmentation of strain PAH02 promoted the formation of core microbiota in the rhizosphere soil of rice (Oryza sativa L.), such as Bradyrhizobium and Streptomyces and induced gene enrichment of CusA and PobA that are strongly associated with pollutant transformation. Consequently, the contents of Cd and Phe in rice grains at maturity decreased by 17.2% +/- 0.2% and 65.7% +/- 0.3%, respectively, after the bioaugmentation of strain PAH02. These findings present new opportunities for the implementation of rhizosphere bioremediation strategies of co-contaminants in paddy fields.
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