Oxidative protective mechanisms and resistance to the dicarboximide fungicide, iprodione, in Alternaria alternata

被引：9

作者：

Steel, CC ^{[1
]}

Nair, NG ^{[1
]}

机构：

[1] NSW AGR, BIOL & CHEM RES INST, RYDALMERE, NSW 2116, AUSTRALIA

来源：

JOURNAL OF PHYTOPATHOLOGY | 1995年 / 143卷 / 09期

关键词：

D O I：

10.1111/j.1439-0434.1995.tb00658.x

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The free radical scavengers alpha-tocopherol and butylated hydroxytoluene, but not ascorbate, diminished the growth-inhibiting effects of the dicarboximide fungicide, iprodione in Alternaria alternata. Growth of A. alternata in the presence of iprodione increased the activities of super oxide dismutase and glutathione reductase while catalase was unaffected. Four iprodione sensitive and four iprodione resistant isolates of A. alternata were compared for activity of free radical enzymes. The isolates of A. alternata resistant to iprodione had more catalase activity than those which were sensitive, but did not differ in superoxide dismutase of glutathione reductase activities. 3-Amino-1,2,4,-triazole, a specific inhibitor of catalase, reduced the ability of DAR 69775, a dicarboximide resistant isolate of A. alternata, to grow in the presence of iprodione. In A. alternata dicarboximide resistance appears to be at least partially mediated by enhanced activities of catalase.

引用

页码：531 / 535

页数：5

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