Involvement of abscisic acid and hydrogen peroxide in regulating the activities of antioxidant enzymes in leaves of rice seedlings under magnesium deficiency.

in Sciences Citation Index(SCI), 科學引文索引資料庫(SCI)
標題Involvement of abscisic acid and hydrogen peroxide in regulating the activities of antioxidant enzymes in leaves of rice seedlings under magnesium deficiency.
出版類型SCI(Sciences Citation Index)
出版年度2012
AuthorsYun-Yang Chao, 趙雲洋, Ting-Shao Chou 周庭卲, & Ching-Huei Kao 高景輝
開始頁1
頁數7
出版日期2012 / 1
其他編號0000
中文摘要

Magnesium (Mg) deficiency in plants is a widespread problem, affecting productivity and quality in agriculture. The mechanism of Mg deficiency inducing antioxidant enzyme activities has not been elucidated in rice. We examined the relationship among abscisic acid (ABA), H2O2, and antioxidant enzymes in the leaves of rice seedlings grown under conditions of Mg deficiency. The expression of OsRab16A, an ABA responsive gene, was used to determine the content of ABA. Mg deficiency resulted in increased ABA content in leaves of rice seedlings. The production of H2O2 was examined by 3,3-diaminobenzidine staining and a colorimetric method. Mg deficiency also induced H2O2 production in leaves, which was blocked by dipehnyleneiodonium chloride (DPI), an NADPH oxidase inhibitor. Tungstate (Tu), an ABA biosynthesis inhibitor, was effective in reducing Mg deficiency-increased ABA content, as well as Mg deficiency-induced H2O2 production. Both Tu and DPI were effective in reducing Mg deficiency-induced activities of superoxide dismutase, ascorbate peroxidase, glutathione reductase, and catalase in the leaves. Mg deficiency-induced ABA accumulation may trigger increased production of H2O2, which may involve plasma-membrane NADPH oxidase, and, in turn, up-regulates the activities of antioxidant enzymes in leaves of rice seedlings.

網址http://link.springer.com/article/10.1007%2Fs10725-011-9623-9
期刊名稱Plant Growth Regul
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