ACTIVE OXYGEN SPECIES IN THE INDUCTION OF PLANT SYSTEMIC ACQUIRED-RESISTANCE BY SALICYLIC-ACID
ACTIVE OXYGEN SPECIES IN THE INDUCTION OF PLANT SYSTEMIC ACQUIRED-RESISTANCE BY SALICYLIC-ACID
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DOI：
10.1126/science.8266079
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发表时间：
1993-12-17
期刊：
影响因子：
56.9
通讯作者：
KLESSIG, DF
中科院分区：
文献类型：
--
作者：
CHEN, ZX;SILVA, H;KLESSIG, DF
已克隆了编码水杨酸（SA）结合蛋白的互补DNA。其性质表明参与SA介导的植物系统获得性抗性（SAR）的诱导。该蛋白质的序列与过氧化氢酶的序列相似，并且该蛋白质表现出过氧化氢酶活性。水杨酸特异性地抑制过氧化氢酶的活性在体外和诱导体内过氧化氢浓度的增加。H2O2或化合物，如SA，抑制过氧化氢酶或增强H2O2的产生，诱导与SAR相关的防御相关基因的表达。因此，SA在SAR中的作用可能是由升高的H2O2量介导的。
A complementary DNA encoding a salicylic acid (SA)-binding protein has been cloned. Its properties suggest involvement in SA-mediated induction of systemic acquired resistance (SAR) in plants. The sequence of the protein is similar to that of catalases and the protein exhibits catalase activity. Salicylic acid specifically inhibited the catalase activity in vitro and induced an increase in H2O2 concentrations in vivo. H2O2 or compounds, such as SA, that inhibit catalases or enhance the generation of H2O2, induced expression of defense-related genes associated with SAR. Thus, the action of SA in SAR is likely mediated by elevated amounts of H2O2.