Effects of copper pollution on the activity of soil invertase and urease in loquat orchards |
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| Authors: | Lijun Fu Wenjin Yang Yangye Wei |
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| Affiliation: | [1]Department of Environment and Life Science, Putian University, Fujian, Putian 351100, China [2]Key Laboratory of Ecological Environment and Information Atlas, Fujian Provincial University, Fujian, Putian 351100, China |
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| Abstract: | Dealt with in this paper is the relationship between Cu contents of soil and activity parameters for soil invertase and urease from the Changtai loquat orchards in Fujian Province. The soil invertase activity and maximum reaction velocity (enzyme kinetic parameters: Vmax and Vmax/Km) have no remarkable negative correlation with Cu concentrations, but Cu concentrations have an obvious positive effect on invertase Kin, indicating a reversible com-petitive restraint on the reaction between Cu and invertase. The soil urease activity and maximum reaction velocity (Vmax,Vmax/Km) have a remarkable negative correlation with Cu concentrations, and in this aspect, they can be used as ecological indices of the soil polluted by Cu. A slightly variable Km indicates the non-reversible competitive restraint level. |
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| Keywords: | Cu pollution soil invertase and urease enzyme kinetic parameter |
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