杨文杰¹,
孙长坡²,
孙运海¹,
姚瑞华¹,
孙宏亮¹,
马乐宽^1,,
1. 环境保护部环境规划院, 北京 100012;
2. 国家粮食局科学研究院, 北京 100037

作者简介: 杨文杰(1980-),女,助理研究员,研究方向为水污染防治,E-mail:wjyang1109@126.com.

通讯作者: 马乐宽,malk@caep.org.cn

中图分类号: X171.5

Influence of Heavy Metals on the Growth and Toxin Synthesis of Fusarium graminearum

Yang Wenjie¹,
Sun Changpo²,
Sun Yunhai¹,
Yao Ruihua¹,
Sun Hongliang¹,
Ma Lekuan^1,,
1. Chinese Academy for Environmental Planning, Beijing 100012, China;
2. Academy of State Administration of Grain, Beijing 100037, China

Corresponding author: Ma Lekuan,malk@caep.org.cn

CLC number: X171.5

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摘要:以禾谷镰刀菌为研究对象,研究了常见重金属(Cu、Pb、Zn、Cd)对禾谷镰刀菌菌株生长及其毒素合成的影响。研究结果表明,重金属对菌株的生长和其产毒能力均产生影响。Cu²⁺和Cd²⁺对菌株生长影响较大,随着浓度的增加对生长的抑制作用增强,当离子浓度分别为20 mg·L^-1和40 mg·L^-1时,能够完全抑制菌株生长。Zn²⁺在0~160 mg·L^-1浓度范围内促进菌株生长,在10 mg·L^-1浓度下促进毒素合成。Pb²⁺在察氏培养基中对菌株生长的影响没有明显规律可循,但是,随着Pb²⁺浓度增加,抑制毒素合成作用增强。
关键词: 重金属/
产毒素真菌/
菌落直径/
玉米赤霉烯酮

Abstract:Effects of heavy metals including Cu, Cd, Zn and Pb on the strain growth and toxin synthesis of Fusarium graminearum were investigated. The results indicated that the concentration and type of heavy metals had impact on the growth and toxin synthesis of the strain. The growth of the strain was inhibited increasingly with the increase of Cu²⁺ and Cd²⁺ concentrations in the culture media, and no growth was observed when the concentrations reached 20 mg·L^-1 and 40 mg·L^-1, respectively. The growth of the strain was promoted under the Zn²⁺ treatment with the concentration ranging from 0 mg·L^-1 to 160 mg·L^-1, but the toxin synthesis was promoted within 10 mg·L^-1. The effect of Pb²⁺ on the growth of the strain was not well-regulated, but the inhibition of toxin synthesis was enhanced with the increase of Pb²⁺ concentration.
Key words:heavy metals/
mycotoxins/
colony diameter/
zearalenone.