Host-specific AB-toxin production by germinating spores of Alternaria brassicicola is induced by a host-derived oligosaccharide

被引：25

作者：

Oka, K

Akamatsu, H

Kodama, M

Nakajima, H

Kawada, T

Otani, H

机构：

[1] Tottori Univ, Fac Agr, Tottori 6808553, Japan

[2] Tottori Univ, United Grad Sch Agr Sci, Tottori 6808553, Japan

来源：

PHYSIOLOGICAL AND MOLECULAR PLANT PATHOLOGY | 2005年 / 66卷 / 1-2期

基金：

日本学术振兴会;

关键词：

Alternaria brassicicola; Brassica plants; host-specific toxin; AB-toxin; toxin-inducing factor; oligosaccharide;

D O I：

10.1016/j.pmpp.2005.03.005

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The phytopathogenic fungus Alternaria brassicicola is the causal agent of black spot disease of Brassica plants and produces a host-specific protein toxin named AB-toxin. AB-toxin is released from spores germinating only on host leaves. In this study, we found a factor for inducing AB-toxin production that is released from host leaves after spore germination has begun. GC and GC-MS analyses of the compound purified by gel filtration chromatography demonstrated that it is an oligosaccharide of 1.3 kDa. This is the first evidence that host-specific toxin production by germinating spores of a fungal pathogen is induced by recognition of host-derived factors. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：12 / 19

页数：8

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