2001•Journal of the Japanese Society for Horticultural ScienceOpen access

Hydrogen Peroxide Contents and Activities of Antioxidative Enzymes among C3, C4 and CAM Plants.

Jincai Li, Xiheng Zhao, Shuichiro Matsui

Abstract

通常の生育条件下のC3植物9種, C4植物7種とCAM植物9種について, 晴天日の午前中に葉をサンプリングし, H2O2含量および抗酸化酵素のSOD, APXとCAT活性を調べた.その結果, C3とC4植物の葉中のH2O2含量は同レベルで, CAM植物より少なかった.C3植物ではSOD, APXおよびCATともに高い活性を示したのに対し, CAM植物ではいずれの酵素ともに低い活性を示した.C4植物はC3植物より高いAPX活性と低いCAT活性を示した.これらのことから, 植物は光合成型によってH2O2などの活性酸素の酵素的な消去機能を異にすることが明らかになった.

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Key concepts: APX, Hydrogen peroxide, Enzyme, Chemistry, Peroxidase, Biochemistry