Effects of neodymium on growth, pectinase activity and mycelium permeability of Fusarium oxysporum

文献类型： 外文期刊

第一作者： Zhang Yufeng

作者： Zhang Yufeng;Yang Lifen;Chen Kaoshan;Dong Liang

作者机构：

关键词： neodymium (Nd3+);Fusarium oxysporum;dry weight of mycelium;colony diameter;pectinase activity

期刊名称：JOURNAL OF RARE EARTHS （ 影响因子：3.712； 五年影响因子：3.326 ）

ISSN： 1002-0721

年卷期： 2007 年 25 卷 1 期

页码：

收录情况： SCI

摘要： The diameter of the colony of Fusarium oxysporum in solid medium, and the mycelium growth, pectinase activity, and mycelium permeability of Fusarium oxysporum in liquid medium under varying concentrations of Nd3+ (0, 2, 4, 10, 20, 40, 60, 80, 100, 120, 140, 160, 180, 200, 300, and 400 mg(.)L(-1)) were measured. The results indicated that the growth of Fusarium oxysporum was stimulated in solid medium when the concentration of Nd3+ ranges from 2 to 180 mg(.)L(-1), whereas it was inhibited when Nd3+ concentration was greater than 200 mg(.)L(-1). The colonies were fewer and smaller when Nd3+ was used in the solid medium. The growth of Fusarium oxysporum was inhibited in liquid medium when Nd3+ was used. The inhibition rate showed by the dry weight of mycelium ranged from 4.83% to 52.18% and increased with Nd3+ concentration. The pectinase activity decreased compared with that of controls. When the concentration of Nd3+ was 10 and 400 mg(.)L(-1), the pectinase activity decreased by 95% at both concentrations. Mycelium cell membrane permeability increased when Nd3+ concentrations ranged from 10 to 400 mg(.)L(-1) but decreased when Nd3+ concentration was 2 mg(.)L(-1).

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