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《Acta Horticulturae Sinica》 2006-02
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Studies on Induction Resistance to Psedoperonospora cubensis by BTH in Cucumber Seedlings

Li Yuhong1,Cheng Zhihui1*,Chen Peng2,and Chen Xiaoguang1(1College of Horticulture, Northwest A & F University, Yangling 712100, China;2College of Life Sciences, Northwest A & F University, Yangling 712100,China)  
0.5 mmol/L BTH was used in seedling with two true leaves 4, 8 and 12 h,or 1,2,4 and 7 days before or 4 and 2 days after inoculation with P.cubensis. Results obtained showed that BTH had not a curative effect but could induce local and systemic resistance in cucumber against the downy mildew. Expression of systemic resistance in leaves was detectable 48 h after treatment and continued for at least 7 days. Chitinase and β-13-glucanase activities analysis showed that induced resistance in cucumber leaves was accompanied by a systemic increasing in both enzymes activities.Two enzymes were related to resistance to downy mildew in cucumber.
【Fund】: 国家‘十五’科技攻关重大专项课题(2004BA516A09);; 西北农林科技大学青年学术骨干支持计划项目;; 西北农林科技大学科研专项基金资助项目(042M083)
【CateGory Index】: S436.421
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