| 几种化学诱导物对黄瓜幼苗霜霉病抗性的诱导作用 |
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| 作者姓名： | 李玉红 程智慧 陈晓光 |
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| 作者单位： | 西北农林科技大学园艺学院 陕西杨凌712100
(李玉红，程智慧)，西北农林科技大学园艺学院 陕西杨凌712100(陈晓光) |
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| 基金项目： | 国家“十五”科技攻关重大专项课题“西部地区蔬菜无公害生产关键技术集成与产业化示范”(2004BA516A09)，西北农林科大科研专项基金“黄瓜-霜霉菌诱导抗性体系研究”(042M083) |
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| 摘 要： | 分别用苯并噻二唑(BTH)、水杨酸(SA)、β-氨基丁酸(BABA)、草酸、KCl溶液处理二叶期的黄瓜幼苗并在2d后接种,结果表明:除KCl以外其余的四种诱导剂都可诱导黄瓜幼苗对霜霉病产生抗性,其中BTH和草酸诱导效果最好,诱导的最适浓度分别为0.5mmol/L和10mmol/L,它们能诱导黄瓜幼苗对霜霉病产生局部抗性和系统的抗性,且抗性的持久期至少在15d以上。复合诱导剂和相应的单一诱导剂的诱导效果相比,霜霉病的病情指数并没有显著差异。
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| 关 键 词： | 化学诱导剂 黄瓜霜霉病 诱导抗性 |
Effect of Several Chemicals on Induction Resistance to Downy Mildew in Cucumber Seedlings |
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| Authors: | Li Yuhong Cheng Zhihui Chen Xiaoguang |
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| Institution: | (1College of horticulture, Northwest Sci-Tech University of Agriculture and Forestry, Yangling Shaanxi 712100) |
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| Abstract: | Aqueous solutions of BTH?SA?BABA?Oxalic acid and KCl were used on seedling with two true leaves 2 days before inoculation with P. cubensis. Results obtained showed t these inducer all could induce resistance in cucumber against downy mildew except KCl. The better inducer in the study were BTH and oxalic acid and their optimum induction concentration were 0.5 mmol/L and 10 mmol/L respectively. Expression of resistance in the leaves after BTH or oxalic acid treatment continued for at least 15 days. The combination of BTH with oxalic acid or BABA did not more significantly increase the induce effect than simple inducer. |
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| Keywords: | Chemical inducer Cucumber downy mildew Induced resistance |
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