Crassulacean Acid Metabolism May Alleviate Production of Reactive Oxygen Species in a Facultative CAM Plant, the Common Ice Plant<i>Mesembryanthemum crystallinum</i>L.
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- Sunagawa Haruki
- Faculty of Agriculture, Saga University.
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- Cushman John C.
- Department of Biochemistry and Molecular Biology, University of Nevada.
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- Agarie Sakae
- Faculty of Agriculture, Saga University.
書誌事項
- タイトル別名
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- Crassulacean Acid Metabolism May Alleviate Production of Reactive Oxygen Species in a Facultative CAM Plant, the Common Ice Plant Mesembryanthemum crystallinum L.
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We examined the function of CAM in reactive oxygen species (ROS) alleviation using a newly isolated CAM-deficient mutant of a facultative halophyte Mesembryanthemum crystallinum L. Salt-stress (0.4 M NaCl) induced nocturnal malate synthesis in the leaves of the wild-type plant, but not in the mutant. The content of hydrogen peroxide (H2O2) increased with elapse of time under salt-stress, but it dropped accompanied by the expression of CAM in the wild-type plants. The CAM-performing wild-type plant grown with 0.4 M NaCl for 12 d showed significantly larger diel fluctuation of malate and significantly lower levels of H2O2 than the mutant, particularly at the end of the light period. The transcript abundance of a gene encoding plastidic Cu/Zn-superoxide dismutase (SOD), a marker of ROS production, was higher in the leaves of mutant plants than in those of wild-type plants. These results indicated that the performance of CAM was accompanied by lower levels of ROS and that CAM may help to alleviate oxidative stress under conditions of environmental stress.
収録刊行物
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- Plant Production Science
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Plant Production Science 13 (3), 256-260, 2010
日本作物学会
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詳細情報 詳細情報について
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- CRID
- 1390001204467582080
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- NII論文ID
- 10026484739
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- NII書誌ID
- AA11162156
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- ISSN
- 13491008
- 1343943X
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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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- JaLC
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- KAKEN
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- 抄録ライセンスフラグ
- 使用不可