摘要： 在建立简单、有效、准确的叶圆片检测黄瓜白粉病抗性的基础上，系统地比较了7种化学诱导物及其组合对黄瓜白粉病抗性的诱导作用。结果表明，草酸、水杨酸、苦参碱、苯基硫脲、复合磷均能显著诱导黄瓜对白粉病的抗性。其诱导效果为草酸＞水杨酸＞苦参碱＞苯基硫脲＞复合磷，氯化钾和硫酸锰的诱导效果不明显。当苯基硫脲、苦参碱与硫酸锰、氯化钾和复合磷分别组合时与单一诱导物相比，诱导效果明显增强；而当水杨酸、草酸与之组合时诱导效果明显减弱，这可能与离子间相互作用有关。

关键词: 诱导抗性, 白粉病, 黄瓜, 化学物质

Abstract: After comparing two different methods for the induced resistance to Sphaerotheca fuliginea(Schlecht), the leaf-disc method was established and was considered as a simpler, more effective and more accurate method than field identification method. Then seven chemicals and their combinations were systemically compared the induction effect on resistance to Sphaerotheca fuliginea(Schlecht). The results showed that OAA, SA, matrine, PTU, complex phosphorus showed significant induction effect, whereas their effect is OAA＞SA＞matrine＞PTU＞complex phosphorus. KCl and MnSO4 did not show the significant induction effect. When combined the organic inducers with inorganic inducers, the results showed that the combination of PTU, matrine with MnSO4, KCl or complex phosphorus respectively, the induction effect were significantly enhanced, whereas SA and OAA combined with inorganic inducers, the induction effect were significantly reduced. This may be related to the interaction between ions.

Key words: Induced resistance, Sphaerotheca fuliginea(Schlecht), Cucumber(Cucumis sativus var Xintaimici), Chemicals