A large family of class III plant peroxidases

  • Hiraga S
  • Sasaki K
  • Ito H
 et al. 
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Class III plant peroxidase (POX), a plant-specific oxi- doreductase, is one of the many types of peroxidases that are widely distributed in animals, plants and microorgan- isms. POXs exist as isoenzymes in individual plant species, and each isoenzyme has variable amino acid sequences and shows diverse expression profiles, suggesting their involve- ment in various physiological processes. Indeed, studies have provided evidence that POXs participate in lignifica- tion, suberization, auxin catabolism, wound healing and defense against pathogen infection. Little, however, is known about the signal transduction for inducing expres- sion of the pox genes. Recent studies have provided infor- mation on the regulatory mechanisms of wound- and pathogen-induced expression of some pox genes. These studies suggest that pox genes are induced via different sig- nal transduction pathways from those of other known defense-related genes.

Author-supplied keywords

  • Function
  • Gene family
  • PR protein
  • Plant peroxidase
  • Signal transduction

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  • Susumu Hiraga

  • Katsutomo Sasaki

  • Hiroyuki Ito

  • Yuko Ohashi

  • Hirokazu Matsui

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