Casucci Cristiano, Okeke Benedict C, Frankenberger William T
Dipartimento di Biotecnologie Agrarie e Ambientali, Università degli Studi di Ancona, Ancona, Italy.
Biol Trace Elem Res. 2003 Aug;94(2):179-91. doi: 10.1385/BTER:94:2:179.
Mercury (Hg) is a persistent soil pollutant that affects soil microbial activity. We monitored the changes in soil microbial biomass and activity of enzymes, including alkaline phosphatase, arylsulfatase, fluorescein diacetate (FDA) hydrolytic activity, and o-diphenol oxidase (o-DPO) in three soils contaminated with different concentrations of Hg. Increasing levels of Hg, from 0.5 to 10 micromol/g of dried soil, generally depressed microbial activity; however, the effects of Hg on soil microbial activity depended on soil type and composition, particularly organic matter content. o-DPO was less affected by Hg than the other three enzymes tested. Our results indicate that the analysis of microbial biomass content and soil-enzyme activities may be used to predict the soil quality contaminated with Hg.
汞（Hg）是一种持久性土壤污染物，会影响土壤微生物活性。我们监测了三种被不同浓度汞污染的土壤中土壤微生物生物量和酶活性的变化，这些酶包括碱性磷酸酶、芳基硫酸酯酶、荧光素二乙酸酯（FDA）水解活性和邻二酚氧化酶（o-DPO）。汞含量从0.5微摩尔/克干土增加到10微摩尔/克干土时，通常会抑制微生物活性；然而，汞对土壤微生物活性的影响取决于土壤类型和组成，特别是有机质含量。与其他三种测试酶相比，o-DPO受汞的影响较小。我们的结果表明，分析微生物生物量含量和土壤酶活性可用于预测受汞污染的土壤质量。
