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Remediation of soils co-contaminated with cadmium and dichlorodiphenyltrichloroethanes by king grass associated with Piriformospora indica: Insights into the regulation of root excretion and reshaping of rhizosphere microbial community structure

文献类型：外文期刊

第一作者： Li, Dong

作者： Li, Dong;Zheng, Xiaoxiao;Jiao, Yangqiu;Li, Qiuli;Li, Zhidong;Hong, Yi;Zhang, Kailu;Xie, Can;Yin, Jing;Zhang, Haixiang;Wang, Baijie;Hu, Yueming;Zhu, Zhiqiang;Lin, Li;An, Qianli

作者机构：

关键词： Endophytic fungus; King grass; Phytoremediation; Root exudates; Rhizosphere microbial community

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （影响因子：14.224；五年影响因子：12.984 ）

ISSN： 0304-3894

年卷期： 2022 年 422 卷

页码：

收录情况： SCI

摘要： Cadmium (Cd) and dichlorodiphenyltrichloroethane (DDT) are frequently detected in agricultural soils, which poses a threat to public health. This study investigated the effects of inoculation of king grass with Piriformospora indica on the remediation of soils co-contaminated with Cd and DDTs. After treatment for 90 days, the dry shoot and root biomass of king grass inoculated with P. indica markedly increased by 13.0-15.8% and 24.1-46.4%, respectively, compared with those of uninoculated plants. Inoculation with P. indica also increased the uptake of Cd and DDTs by shoots and roots of king grass. The removal efficiency of Cd and DDTs from soils reached 4.88-17.4% and 48.4-51.0%, respectively, in the presence of king grass inoculated with P. indica. Under three Cd-DDTs contamination conditions, root secretion of organic acids, alcohol, and polyamines was distinctively stimulated by P. indica inoculation of king grass compared with planting king grass alone. After phytor-emediation, changes in soil bacterial and fungal community composition occurred at different contamination levels. Overall, the results showed that king grass associated with P. indica can be adopted for phytoextraction of Cd and DDTs from moderately contaminated soils by regulating root excretion and reshaping rhizosphere mi-crobial community structure.

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