在改变Nd~(3+)的集中的液体 mediumunder 的镰刀霉 oxysporum 的在稳固的媒介的镰刀霉 oxysporum 的殖民地的直径，和 themycelium 生长， pectinase 活动，和菌丝体渗透( 0,2,4,10,20,40,60,80,100,120,140,160,180,200,300 ，并且 400 mgcentre 点 L-1 ) measured.The 结果被显示在稳固的媒介的镰刀霉 oxysporum wasstimulated 的生长当Nd~(3+)的集中从 2～180 mg 时，集中 dotL-1 ，而它被禁止什么时候Nd~(3+) concentrat
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 Nd^3＋ （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 Nd^3＋ ranges from 2 to 180 mg·L^-1, whereas it was inhibited when Nd^3 ＋ concentration was greater than 200 mg· L^-1. The colonies were fewer and smaller when Nd^3 ＋ was used in the solid medium. The growth of Fusarium oxysporum was inhibited in liquid medium when Nd^3＋ was used. The inhibition rate showed by the dry weight of mycelium ranged from 4.83% to 52.18% and inereased with Nd^3 ＋ concentration. The pectinase activity decreased compared with that of controls. When the concentration of Nd^3 ＋ was 10 and 400 mg· L^- 1, the pectinase activity decreased by 95 % at both concentrations. Mycelium cell membrane permeability increased when Nd^3 ＋ concentrations ranged from 10 to 400 mg· L^-1 but decreased when Nd^3＋ concentration was 2 mg· L^-1.
Journal of Rare Earths
Project supported by the High Technology Research and Development Program of China （2002AA244031）, China Postdoctoral Science Foundation and Young Foundation of Shandong Academy of Agricultural Science
neodymium （Nd^3＋ ）
dry weight of mycelium
Zhang Yufeng （1972-）, Female, Doctor, Associate professor; Research interests： plant nutrient and biological pesticide
Corresponding author （E-mail ： ksc313 @ 126. com）