Metabolic Response to Treatment with Cold, Paraquat, or 3-Amino-1,2,4-triazole in Leaves of Winter Wheat

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概要

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• We treated leaves of winter wheat (Triticum aestivum L.) with cold, paraquat, or 3-amino-1,2,4-triazole and compared the responses. We assayed the activities of glucose-6-phosphate dehydrogenase, catalase, dehydroascorbate reductase and ascorbate free radical reductase and levels of hydrogen peroxide, glucose-6-phosphate, fructose-6-phosphate, ascorbate, dehydroascorbate, reduced and oxidized glutathione. With any of the three treatments, contents of cellular peroxides and hexose phosphates were raised. The content of ascorbate was lowered markedly by paraquat treatment, which produces active oxygen species, whereas such a decrease did not occur in other two treatments. When the plants were treated with 3-amino-1,2,4-triazole, which is a specific inhibitor of catalase, the content of oxidized glutathione increased severalfold. The glucose-6-phosphate dehydrogenase activity increased with all three treatments, but it decreased after glyphosate treatment, which dose not stimulate the formation of peroxides. The activities of catalase and dehydroascorbate reductase were increased by the treatment of peroxides. The activities of catalase and dehydroascorbate reductase were increased by the treatment of cold and paraquat, while 3-amino-1,2,4-triazole did not affect the dehydroascorbate reductase activity. The acitivity of ascorbate free radical reductase increased after treatment by paraquat only.

• 社団法人日本農芸化学会の論文
• 1992-12-23

著者

• SAGISAKA Shonosuke

  The Institute of Low Temperature Science, Hokkaido University

• SAGISAKA Shonosuke

  Institute for Plant Cytochemistry, Tonden

• Sugawara Makihiro

  Institute Of Low Temperature Science Hokkaido University

• Okuda Tohru

  The Institute Of Low Temperature Science Hokkaido University

• Sagisaka S

  The Institute Of Low Temperature Science Hokkaido University

• Matsuda Yusuke

  The Institute of Low Temperature Science, Hokkaido University

• OKUDA Tohru

  Institute of Low Temperature Science, Hokkaido University

• MATSUDA Yusuke

  Institute of Low Temperature Science, Hokkaido University

• Matsuda Y

  Iwate Univ. Morioka Jpn

• Sagisaka Shonosuke

  Institute For Plant Cytochemistry Tonden

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