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- 丸田 隆典
- 島根大学生物資源科学部生命工学科
書誌事項
- タイトル別名
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- Regulation of reactive oxygen species actions via ascorbic acid metabolism
- アスコルビンサン タイシャ オ カイシタ カッセイ サンソシュ ノ セイリ カッセイ チョウセツ
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Reactive oxygen species (ROS) act not only as toxic compounds, but also as signaling molecules associated with responses to abiotic and biotic stresses in living organisms. The cellular redox state consisting of a delicate balance between ROS-production and ROS-scavenging must be strictly controlled. Ascorbic acid (AsA) is the most abundant water-soluble antioxidant in plants. Biochemical and molecular genetic approaches we have found by that AsA is mainly synthesized via a D-mannose/L-galactose pathway and that the pathway is regulated by light/dark and plastid-derived signals. AsA peroxidase (APX) plays a central role in controlling cellular H_2O_2 levels. We have demonstrated that cytosolic and chloroplastic APXs are required for plant tolerance and response to various types of stresses. Furthermore, using a conditional APX silencing system, we have found that chloroplastic H_2O_2 acts as a specific signal and regulates plant response to stress and hormones. Thus, our findings revealed a central role of AsA metabolism for regulating the cytotoxic effect and the signaling function of ROS in plants.
収録刊行物
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- ビタミン
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ビタミン 88 (1), 1-10, 2014
公益社団法人 日本ビタミン学会
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詳細情報 詳細情報について
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- CRID
- 1390001205700560128
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- NII論文ID
- 110009767425
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- NII書誌ID
- AN00207833
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- ISSN
- 2424080X
- 0006386X
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- NDL書誌ID
- 025170525
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可