Journal Article

A Large Family of Class III Plant Peroxidases

Susumu Hiraga, Katsutomo Sasaki, Hiroyuki Ito, Yuko Ohashi and Hirokazu Matsui

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 42, issue 5, pages 462-468
Published in print May 2001 | ISSN: 0032-0781
Published online May 2001 | e-ISSN: 1471-9053 | DOI:
A Large Family of Class III Plant

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  • Biochemistry
  • Molecular and Cell Biology
  • Plant Sciences and Forestry


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Class III plant peroxidase (POX), a plant-specific oxidoreductase, is one of the many types of peroxidases that are widely distributed in animals, plants and microorganisms. POXs exist as isoenzymes in individual plant species, and each isoenzyme has variable amino acid sequences and shows diverse expression profiles, suggesting their involvement in various physiological processes. Indeed, studies have provided evidence that POXs participate in lignification, suberization, auxin catabolism, wound healing and defense against pathogen infection. Little, however, is known about the signal transduction for inducing expression of the pox genes. Recent studies have provided information on the regulatory mechanisms of wound- and pathogen-induced expression of some pox genes. These studies suggest that pox genes are induced via different signal transduction pathways from those of other known defense-related genes.

Keywords: Key words: Function — Gene family — Plant peroxidase — PR protein — Signal transduction.; Abbreviations: EST, expressed sequence tag; JA, jasmonic acid; POX, class III plant peroxidase; PR, pathogenesis-related; RGP, Rice Genome Research Program; SA, salicylic acid.

Journal Article.  5912 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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