Effect of heavy-metal on amylolytic activity of the soil yeasts Geotrichum capitatum and Geotrichum candidum

被引:12
作者
Falih, AM [1 ]
机构
[1] Teachers Coll, Dept Biol, Riyadh 11491, Saudi Arabia
关键词
heavy metals; toxicity; soil yeasts; amylase; enzyme;
D O I
10.1016/S0960-8524(98)00063-7
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
This study, investigated the ability of the soil yeasts Geotrichum candidum and Geotrichum capitatum to produce extracellular amylase in Czapek-Dox liquid medium amended with different concentrations of Cd, Co, Ca, Mrl, Ni ann Pb. Yeasts were able to survive ann grow in the medium containing up to 400 mu g/ml of metal ions. Addition of heavy metals caused a highly significant inhibition of amylase production by, soil yeasts tested. The amylolytic activity of G. candidum and G. capitatum decreased as the concentration of heavy metals increased: The soil yeast G. candidum exhibited the highest amylolytic activity. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:213 / 217
页数:5
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