Hydrogen peroxide production is a general property of the lignifying xylem from vascular plants

被引：76

作者：

Barcelo, AR ^{[1
]}

机构：

[1] Univ Murcia, Dept Plant Biol Plant Physiol, E-30100 Murcia, Spain

来源：

ANNALS OF BOTANY | 1998年 / 82卷 / 01期

关键词：

H2O2; generation; lignification; peroxidase; tetramethylbenzidine; xylem;

D O I：

10.1006/anbo.1998.0655

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Production of hydrogen peroxide (H2O2) by the lignifying xylem of several vascular plants has been studied using a new histochemical method based on the H2O2-dependent oxidation of 3,5,3'5'-tetramelhylbenzidine (TMB) catalysed by cell wall peroxidases. This method allows H2O2 to be determined in the range of 5-100 mu M, where other methods, such as the KI/starch reagent, fail. With this method, it has been possible to determine H2O2 production in the lignifying xylem of a wide range of vascular plants (gymnosperms and angiosperms). The capability of xylem tissues of sustaining H2O2 production lends support to the hypothesis that cinnamyl alcohol polymerization in xylem vessels is caused by an H2O2-dependent oxidative coupling process. (C) 1998 Annals of Botany Company.

引用

页码：97 / 103

页数：7

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