| 硅对黄瓜白粉病抗性的影响及其生理机制 |
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| 引用本文： | 魏国强,朱祝军,钱琼秋,李娟. 硅对黄瓜白粉病抗性的影响及其生理机制[J]. 植物营养与肥料学报, 2004, 10(2): 202-205. DOI: 10.11674/zwyf.2004.0218 |
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| 作者姓名： | 魏国强 朱祝军 钱琼秋 李娟 |
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| 作者单位： | 1.浙江大学园艺系 浙江杭州310029 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 以黄瓜感病品种为材料,研究了施硅和诱导接种白粉菌对抗坏血酸过氧化物酶(AsA-POD)、脱氢抗坏血酸还原酶(DR)、苯丙氨酸解氨酶(PAL)、多酚氧化酶(PPO)活性与酚类物质含量变化的影响。结果表明:诱导接种后,营养液中加硅酸盐显著降低黄瓜白粉病病情指数,显著提高了黄瓜叶片中AsA-POD、PPO的活性,而DR、PAL活性低于不施硅处理,但差异不显著。施硅处理的酚类物质含量较高,并显著降低病情指数。
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| 关 键 词： | 黄瓜 白粉病 硅 酶活性 酚类物质 |
| 文章编号： | 1008-505X(2004)02-0202-04 |
| 修稿时间： | 2003-03-21 |
Effect of silicon on resistance of cucumber powdery mildew and its physiological mechanism |
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| WEI Guo-qiang,ZHU Zhu-jun,QIAN Qiong-qiu,LI Juan. Effect of silicon on resistance of cucumber powdery mildew and its physiological mechanism[J]. Plant Nutrition and Fertilizer Science, 2004, 10(2): 202-205. DOI: 10.11674/zwyf.2004.0218 |
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| Authors: | WEI Guo-qiang ZHU Zhu-jun QIAN Qiong-qiu LI Juan |
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| Affiliation: | 1.Department of Horticulture;Zhejiang University;Hangzhou 310029;China |
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| Abstract: | Solution culture experiments was conducted with a susceptible cucumber cultivar to investigate the effects of soluble silicon and inoculation with Sphaerotheca fuliginea on activities of leaves ascorbate peroxidase(AsA-POD), dehydroascorbate reductase(DR),phenylalanine ammonia-lyase(PAL),polyphemol oxidase(PPO) and phenolic compound content in cucumber leaves. The results showed that the disease index after inoculation was significantly decreased by Si supplied(Si+). The activities of AsA-POD and PPO in the leaves of Si supplied(Si+) plants were significantly enhanced. The activities of DR and PAL in the leaves of Si deprived(Si-)plants were slightly higher than in those of Si supplied(Si+) plants,while no significant difference between them. The content of phenolic compound was higher in the leaves of Si supplied(Si+) plants than those of Si deprived(Si-) plants. |
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| Keywords: | cucumber powdery mildew silicon enzymes activity phenolic compound |
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