DIFFERENTIAL RESPONSE OF SWEET CORN CULTIVARS TO PHYTOTOXIC WATER-SOLUBLE COMPOUNDS FROM CULTURE FILTRATES OF EXSEROHILUM-TURCICUM

被引：11

作者：

BASHAN, B

LEVY, Y

机构：

来源：

PLANT DISEASE | 1992年 / 76卷 / 05期

关键词：

D O I：

10.1094/PD-76-0451

中图分类号：

Q94 [植物学];

学科分类号：

071001 [植物学];

摘要：

Phytotoxic substances were isolated from culture filtrates of Exserohilum turcicum grown in Fries' medium, or from susceptible corn plants infected with the fungus. The substances significantly inhibited chlorophyll biosynthesis in corn seedlings susceptible to E. turcicum but not in those resistant to the fungus. The phytotoxic substances were extracted from culture filtrates of eight different isolates of E. turcicum. A positive correlation was found between lesion size of isolates and phytotoxic activity. Lesion size and infection efficiency of E. turcicum on susceptible excised leaves pretreated with one or more phytotoxic substances increased by 119 and 30%, respectively, indicating that these substances may be a virulence factor.

引用

页码：451 / 454

页数：4

共 26 条

[1]

ABADI R, 1988, PHYTOPARASITICA, V17, P23

[2]

THE POSSIBLE INVOLVEMENT OF CYTOKININS IN THE PATHOGENICITY OF HELMINTHOSPORIUM-MAYDIS [J].