Effects of soil chromium pollution on activity of antioxidant enzyme of Eisenia fetida

doi:10.7523/j.issn.2095-6134.2020.01.004

Abstract

Abstract: Effects of the soil type, exposure time, and chromium (VI) concentration on antioxidant enzyme[SOD (superoxide dismutase), CAT (catalase), and POD (peroxidase)] activity of Eisenia fetida were investigated. The experimental soils were selected from Heilongjiang, Shanxi, and Jiangsu Provinces, and then were aged for 40 days. The results of the significance analysis showed a significant difference in SOD activity in different soils (P<0.05), and Cr(VI) concentration and exposure time showed an extremely significant difference in SOD activity (P<0.01). Similar to SOD activity, the significant difference was found in the CAT activities of different soils (P<0.05), and Cr(VI) concentration and exposure time showed extremely significant effects (P<0.01) on CAT activity. Whereas, POD activities of different soils were significantly different (P<0.01), Cr(VI) concentration has a significant effect on POD activity (P<0.05), and the effect of exposure time on POD activity was significantly different (P<0.01). In Heilongjiang's aging soil, the POD and SOD activities increased significantly in the early exposure. In the experimental group exposed for 28 days, the maximum POD and SOD concentrations were 2.03 and 1.25 times those of the control group, respectively. With the delay of exposure time, the activities of POD and SOD were significantly inhibited, while there was no significant change in CAT activity in E. fetida. In the early exposure of soil of Jiangsu, the change trends of POD and SOD with time were similar to those of soil of Heilongjiang. In the early exposure of soil of Shanxi, POD and CAT activities increased significantly, and with the delay of exposure time the enzyme activity was significantly inhibited, but the SOD activity showed no obvious change under different aged treatments.

Key words: chromium(Cr), Eisenia fetida, antioxidant enzyme, toxicity test, aging soil

CLC Number:

X171.1

LI Zejiao, CUI Yanshan, CAI Xiaolin, WANG Pengfei. Effects of soil chromium pollution on activity of antioxidant enzyme of Eisenia fetida[J]. , 2020, 37(1): 20-26.

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