Interfacial effect of Stropharia rugoso-annulata in liquid medium: interaction of exudates and nickel-quintozene

文献类型： 外文期刊

第一作者： Liu, Hongying

作者： Liu, Hongying;Fan, Xinzou;Chen, Yanli;Xu, Heng;Dong, Shunwen

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期刊名称：RSC ADVANCES （ 影响因子：3.361； 五年影响因子：3.39 ）

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收录情况： SCI

摘要： This work investigated the accumulation of nickel (Ni) and dissipation of quintozene (PCNB) by the mycelia of Stropharia rugoo-annulata (S. rugoo-annulata), together with the correlation between cell exudates and contaminants removal in liquid medium. Results showed that the removal rates of PCNB accounted for 20.75-55.26% and 42.39-90.92% of the initial concentration (125 mg kg(-1)) in un-inoculated and inoculated media, respectively. Ni accumulation in mycelia of S. rugoo-annulata at the end of experiment was 81.09 mg kg(-1) when the initial concentration of Ni was 30 mg L-1 in polluted media, among which the proportion of NaCl-extractable (56.34%) was dominant. These results showed that PCNB and Ni were remarkably removed by mycelia incubation. The concentrations of cell exudates (macromolecular substances, low-weight-molecular organic acids (LMWOAs), liglinolytic enzymes) were quite different in both polluted and natural media inoculated with S. rugoo-annulata, indicating that the production of exudates was closely related to PCNB and Ni. Besides, the results of scanning electron microscopy (SEM) and diffuse reflectance infrared Fourier-transform spectroscopy (DRIFTS) demonstrated that the pollutants influenced the surface phenotypic structure but not for basic cell structures, implying mycelia of S. rugoo-annulata could well tolerate the pollutants. Our results suggested the presence of S. rugoo-annulata was effective in promoting the bioremediation of Ni-PCNB and laid the foundation for a better understanding of the mechanism about contaminant removal by mushroom.

分类号： O6

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