O_3 Tolerance and the Ascorbate-Dependent H_2O_2 Decomposing System in Chloroplasts :
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- Tanaka,Kiyoshi
- Division of Environmental Biology, the National Institute for Environmental Studies
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- Suda,Yoshiko
- Department of Environmental Chemisty, Faculty of Science, Toho University
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- Kondo,Noriaki
- Division of Environmental Biology, the National Institute for Environmental Studies
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- Sugahara,Kiyoshi
- Division of Environmental Biology, the National Institute for Environmental Studies
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抄録
The relationship between O_3 tolerance and the chloroplast H_2O_2 scavenging system (PS I→ferredoxin→NADP→GSH→ascorbate) was investigated. When spinach plants were fumigated with 0.5 ppm O_3, the levels of ascorbate decreased within a few hours. In six spinach cultivars, King of Denmark and Touko, which have a strong tolerance to O_3, were found to have higher ascorbate and glutathione levels than the other cultivars. However, there was no remarkable difference among these six cultivars in the levels of enzymes which protect plants against active oxygen. When spinach plants were fumigated with a low concentration of O_3 (0.1 ppm), which caused no visible injury, an increase in ascorbate peroxidase activity was found within a few days. The results suggest a possible involvement of the chloroplast H_2O_2 scavenging system in detoxifying O_3.
収録刊行物
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- Plant and cell physiology
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Plant and cell physiology 26 (7), 1425-1431,
Japanese Society of Plant Physiologists
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詳細情報 詳細情報について
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- CRID
- 1540572720360380800
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- NII論文ID
- 110003718893
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- NII書誌ID
- AA0077511X
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- 本文言語コード
- en
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- データソース種別
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- NDL-Digital
- CiNii Articles