Salicylic acid-mediated hydrogen peroxide accumulation and protection against Cd toxicity in rice leaves

in Sciences Citation Index(SCI), 科學引文索引資料庫(SCI)
標題Salicylic acid-mediated hydrogen peroxide accumulation and protection against Cd toxicity in rice leaves
出版類型SCI(Sciences Citation Index)
出版年度2010
AuthorsYun-Yang Chao, 趙雲洋, Chao-Yeh Chen 陳炤燁, Wen-Dar Huang 黃文達, & Ching-Huei Kao 高景輝
開始頁327
頁數10
出版日期2009 / 11
其他編號0000
中文摘要

The role of H2O2 in salicylic acid (SA)-induced protection of rice leaves against subsequent
Cd toxicity was investigated. SA pretreatment resulted in an increase in the contents of endogenous SA, as judged by the expression of OsWRKY45 (a SA responsive gene), and H2O2 in rice leaves. Diphenyleneiodonium (DPI) and imidazole (IMD), inhibitors of NADPH oxidase, prevented SA-increased H2O2 production, suggesting that NADPH oxidase is a H2O2-generating enzyme in SA-pretreated rice leaves. DPI and IMD also inhibited SA-increased activities of superoxide dismutase (SOD), ascorbate peroixdase (APX), and glutathione reductase (GR)activities, but had no effect on SA-increased catalase (CAT) activity. Moreover, SA-induced protection against subsequent Cd toxicity could also be prevented by DPI and IMD. The inhibitory effect of DPI and IMD on SA-induced protection against subsequent Cd toxicity could be reversed by exogenous
H2O2. All these results suggested that SA induced protection against subsequent Cd toxicity is
mediated through H2O2. This conclusion is supported further by the observations that exogenous
H2O2 application resulted in an increase in SOD,APX, and GR activities, but not CAT activity and a protection against subsequent Cd toxicity of rice leaves.

網址http://link.springer.com/article/10.1007%2Fs11104-009-0161-4
期刊名稱Plant Soil
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