Comparison of Indole-3-acetic Acid Oxidation in Peroxidases from Rust-Infected Resistant Wheat Leaves

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概要

• 論文の詳細を見る

• Seven peroxidase isozyme fractions were isolated from rust-infected resistant wheat leaves by means of ammonium sulfate fractionation, pH precipitation, ion exchange chromatography and gel filtration. Three isozymes showed a single peroxidative band in the electrophoretic gels. The catalytic activity of the enzymes on non-physiological substrates was comparable to that of commercial horseradish peroxidase. When compared to isozyme 9, isozyme 10 had twice the activity on guaiacol and eugenol but only one-fifth the oxidative activity on p-phenylenediamine and o-dianisidine. The IAA oxidation activity was compared among purified enzyme fractions. Isozyme 10 was the only enzyme which could destroy the auxin without phosphate and manganese cofactors. All the other enzymes, including isozyme 9, showed the activity only when both cofactors were present. The possible involvement of these peroxidases in IAA destruction in the resistant tissue is discussed.

• 日本植物生理学会の論文

著者

• Daly J.

  Department Of Agricultural Biochemistry University Of Nebraska

• Ueng P.

  Department of Food Science, Purdue University

• Ueng P.

  Department Of Food Science Purdue University

関連論文

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• Studies on the Conformations of PM-Toxin, the Host-specific Corn Pathotoxin Produced by Phyllosticta maydis(Organic Chemistry)
• Comparison of Indole-3-acetic Acid Oxidation in Peroxidases from Rust-Infected Resistant Wheat Leaves
• Synthesis and Biological Activity of a New Type of PM-Toxin Analogue Containing Oxygen Atoms in the Carbon-Chain Skeleton
• Synthesis of a Stereoisomeric Mixture of (±)-PM-Toxin B, a Host-specific Corn Pathotoxin Produced by Phyllosticta maydis

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