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Mechanism of BTH Inducing Resistance Against Powdery Mildew of Pepper(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2016年16
Page:
113-118
Research Field:
Publishing date:

Info

Title:
Mechanism of BTH Inducing Resistance Against Powdery Mildew of Pepper
Author(s):
MO Xili1; JIANG Xuanli2
(1.Department of Bioengineering，Qianxinan Vocational and Technical College of Nationality，Xingyi,Guizhou 562400；2.College of Agriculture,Guizhou University，Guiyang，Guizhou 550025)
Keywords:
BTH; pepper; defense enzyme
PACS:
-
DOI:
10.11937/bfyy.201616030
Abstract:
Taking Huaxi pepper and Zunyi pepper as materials，powdery mildew as test fungi，BHT as inducer，using spraying method，the mechanism of inducing resistance against powdery mildew of pepper was studied.The results showed that the resistance of pepper to powdery mildew was induced by BTH at different concentrations，and the best control effect was 81.82% after 0.20 mmol?L-1 BTH spraying treatment.The activities of POD,PPO and PAL were raised obviously after treated by BTH-Leveillula taurica inoculation.The chitinase and β-1,3-glucanase activities of pepper increased after BTH-Leveillula taurica treatment and BTH-water treatment,and which were better than the CK-Leveillula taurica treatment.BTH would not affect the spore germination and the appressorium generation，but it could effectively control the expansion of hypha，such as the hypha slow expansion and collateral reducing.Through the scanning electron microscopy (sem)，the result showed that the blade coating of pepper begins to be dissolved after 24 hours by CK-Leveillula taurica treatment.But in BTH-Leveillula taurica treatment，the blade coating appear the phenomenon after 48 hours.That the pepper was induced to produce chemicals which could put off or delay hyphae destroy the protective layer of pepper.

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Last Update: 2016-09-18