Investigating the Mechanism of Cadmium-Tolerant Bacterium Cellulosimicrobium and Ryegrass Combined Remediation of Cadmium-Contaminated Soil
文献类型： 外文期刊
作者： Li, Jiaqi 1 ; Xu, Xiaoyang 1 ; Song, Lanping 1 ; Na, Meng 1 ; Xu, Shangqi 1 ; Zhang, Jie 1 ; Huang, Yongjie 1 ; Li, Xiaoping 2 ; Zheng, Xianqing 3 ; Zhou, Jihai 1 ;
作者机构： 1.Anhui Normal Univ, Sch Ecol & Environm, Wuhu 241002, Peoples R China
2.Nanjing Forestry Univ, Collaborat Innovat Ctr Southern Modern Forestry, Nanjing 210037, Peoples R China
3.Shanghai Acad Agr Sci, Inst Ecoenvironm & Plant Protect, Shanghai 201403, Peoples R China
关键词： Cd pollution; biological co-remediation; antioxidant enzyme system; none-enzymatic antioxidant system; microorganisms
期刊名称：PLANTS-BASEL （ 影响因子：4.0； 五年影响因子：4.4 ）
ISSN： 2223-7747
年卷期： 2024 年 13 卷 12 期
页码：
收录情况： SCI
摘要： Cadmium (Cd) pollution has been rapidly increasing due to the global rise in industries. Cd not only harms the ecological environment but also endangers human health through the food chain and drinking water. Therefore, the remediation of Cd-polluted soil is an imminent issue. In this work, ryegrass and a strain of Cd-tolerant bacterium were used to investigate the impact of inoculated bacteria on the physiology and biochemistry of ryegrass and the Cd enrichment of ryegrass in soil contaminated with different concentrations of Cd (4 and 20 mg/kg). The results showed that chlorophyll content increased by 24.7% and 41.0%, while peroxidase activity decreased by 56.7% and 3.9%. In addition, ascorbic acid content increased by 16.7% and 6.3%, whereas glutathione content decreased by 54.2% and 6.9%. The total Cd concentration in ryegrass increased by 21.5% and 10.3%, and the soil's residual Cd decreased by 86.0% and 44.1%. Thus, the inoculation of Cd-tolerant bacteria can improve the antioxidant stress ability of ryegrass in Cd-contaminated soil and change the soil's Cd form. As a result, the Cd enrichment in under-ground and above-ground parts of ryegrass, as well as the biomass of ryegrass, is increased, and the ability of ryegrass to remediate Cd-contaminated soil is significantly improved.
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