Synergistic effects of Cd-loving Bacillus sp. N3 and iron oxides on immobilizing Cd and reducing wheat uptake of Cd

文献类型： 外文期刊

第一作者： Han, Hui

作者： Han, Hui;Xia, Xing;Yang, Jianjun;Han, Hui;Wu, Xuejiao;Hui, Ruiqing;Chen, Zhaojin;Yao, Lunguang

作者机构：

关键词： Cd-loving strain; Co-occurrence network; Cadmium; Wheat; Iron oxides

期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：9.988； 五年影响因子：10.366 ）

ISSN： 0269-7491

年卷期： 2022 年 305 卷

页码：

收录情况： SCI

摘要： Iron oxides and microorganisms are important soil components that profoundly affect the transformation and bioavailability of heavy metals in soils. Here, batch and pot experiments were conducted to investigate the immobilization mechanisms of Cd by Cd-loving Bacillus sp. N3 and ferrihydrite (Fh) as well as their impacts on Cd uptake by wheat and bacterial community composition in wheat rhizospheric soil. The results showed that the combination of strain N3 with Fh could immobilize more Cd compared to strain N3 and Fh, respectively. Furthermore, strain N3 facilitated Cd retention on Fh, which synergistically reduced the concentration of DTPA extracted Cd in the soil and decreased Cd content (57.1%) in wheat grains. Moreover, inoculation with strain N3 increased the complexity of the co-occurrence network of the bacterial community in rhizospheric soil, and the abundance of beneficial bacteria with multipel functions including heavy metal immobilization, dissimilatory iron reduction, and plant growth promotion. Overall, this study demonstrated the enrichment of strain N3 and iron oxides, together with increased soil pH, synergistically immobilized soil Cd, which strongly suggested inoculation with Cd-loving strains could be a promising approach to immobilize Cd and reduce wheat uptake of Cd, particular for soils rich in iron oxides.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序