Mechanisms of Cd and Cr removal and tolerance by macrofungus Pleurotus ostreatus HAU-2
文献类型: 外文期刊
第一作者: Li, Xuanzhen
作者: Li, Xuanzhen;Yu, Hao;Jiao, Shuai;Yuan, Yuan;Li, Xuanzhen;Wang, Youjing;Pan, Yanshuo;Zhang, Xiaolin;Wu, Kun;Zhang, Shimin;Shen, Yanping;La, Guixiao
作者机构:
关键词: Heavy metals;Macrofungus;Remediation;Accumulation;Adsorption
期刊名称:JOURNAL OF HAZARDOUS MATERIALS ( 影响因子:10.588; 五年影响因子:10.129 )
ISSN:
年卷期:
页码:
收录情况: SCI
摘要: Fungi bioaccumulation is a novel and highly promising approach to remediate polluted soil. The present study revealed a high ability to tolerate Cd and Cr in the fungus Pleurotus ostreatus HAU-2. However, high concentrations of Cd and Cr can suppress fungal growth and result in a variation of hypha micro morphology. Batch experiments were performed to investigate Cd and Cr stress effects on the amount of active oxygen in fungi, activity of antioxidant enzyme, as well as the removal efficiency of Cd and Cr. The results revealed that Cd and Cr caused increasing active oxygen and malonaldehyde (MDA) concentrations. Antioxidant enzymes play a central role in removing active oxygen, while glutathione (GSH) aids the Cd detoxification within cells. In fluid culture, fungal removal rates of Cd and Cr ranged from 44.85% to 80.36% and 14.49% to 45.55%, respectively. Intracellular accumulation and extracellular adsorption were the major removal approaches. Bag cultivation testing indicated that the fungus absorbed Cd and Cr contained within soil. In particular, the accumulation ability of Cd (15.6 mg kg(-1))"was higher compared to that of Cr (8.9 mg kg(-1)). These results successfully establish P. ostreatus HAU-2 as promising candidate for the remediation of heavy-metal polluted soils. (C) 2017 Elsevier B.V. All rights reserved.
分类号: TB1
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