An early salicylic acid-, pathogen- and elicitor-inducible tobacco glucosyltransferase:: role in compartmentalization of phenolics and H2O2 metabolism

被引：39

作者：

Chong, J ^{[1
]}

Baltz, R ^{[1
]}

Fritig, B ^{[1
]}

Saindrenan, P ^{[1
]}

机构：

[1] Univ Strasbourg 1, CNRS, Inst Biol Mol Plantes, F-67000 Strasbourg, France

来源：

FEBS LETTERS | 1999年 / 458卷 / 02期

关键词：

defense response; phenylpropanoid; hydroxycoumarin; glucosylation; H2O2; Nicotiana tabacum;

D O I：

10.1016/S0014-5793(99)01154-0

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Treatment of tobacco cell suspension cultures,vith a fungal elicitor of defense responses resulted in an early accumulation of the phenylpropanoid glucosyltransferase TOGT, along with the rapid synthesis and secretion of scopolin, the glucoside of scopoletin. Elicitor-triggered extracellular accumulation of the aglycone scopoletin and of free caffeic and ferulic acids could only be revealed in the presence of diphenylene iodonium, an inhibitor of extracellular H2O2 production. Our results strongly support a role for TOGT in the elicitor-stimulated production of transportable phenylpropanoid glucosides, followed by the release of free antioxidant phenolics into the extracellular medium and subsequent H2O2 scavenging. (C) 1999 Federation of European Biochemical Societies.

引用

页码：204 / 208

页数：5

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