Different concentrations of jasmonic acid(JA)and benzothiadiazole(BTH) were sprayed on 2-year-old Rosa rugosa‘Plena’ seedlings. The induced resistance of JA and BTH to Sphaerotheca pannosa(Wallr.) and the changes of...Different concentrations of jasmonic acid(JA)and benzothiadiazole(BTH) were sprayed on 2-year-old Rosa rugosa‘Plena’ seedlings. The induced resistance of JA and BTH to Sphaerotheca pannosa(Wallr.) and the changes of their related physiological indices were investigated. Results showed that JA and BTH treatments had inhibitory impacts on S. pannosa infection. The optimal concentration of JA and BTH was 0.5 mmol/L for the disease-resistance induction of the leaves, its inductive effect was up to 66.36% for BTH and 54.49% for JA. Our results confirmed that exogenous JA and BTH significantly improved R. rugose ‘Plena’ resistance to S. pannosa. When treated with JA and BTH, activities of the three defense enzymes(POD, PPO, and PAL) increased significantly.Contents of total phenolics, flavonoids, and lignin also increased significantly. It is inferred from these results that exogenous JA and BTH could improve the resistance of R.rugose ‘Plena’ to S. pannosa through enhancing activities of the defensive enzymes and accumulation of secondary metabolites in the leaves.展开更多
The researches through Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM) indicated that Sphaerotheca pannosa directly intrude in the place of concave of rose leaves,form filiform haustorium...The researches through Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM) indicated that Sphaerotheca pannosa directly intrude in the place of concave of rose leaves,form filiform haustorium in the epidermal cells,absorb the nutrient and water,and destory the internal structure of mitochondrions,etc.when epidermal cells are filled with filiform haustorium.展开更多
草莓白粉病是草莓生产中的常见病害。试验目的在于测试6.5%芳姜黄酮乳油对草莓白粉病的田间防治效果。用43%氟菌·肟菌酯悬浮剂和300 g/L醚菌·啶酰菌悬浮剂作为对照药剂,在上海市青浦区开展田间药效小区及大区试验。结果显示,...草莓白粉病是草莓生产中的常见病害。试验目的在于测试6.5%芳姜黄酮乳油对草莓白粉病的田间防治效果。用43%氟菌·肟菌酯悬浮剂和300 g/L醚菌·啶酰菌悬浮剂作为对照药剂,在上海市青浦区开展田间药效小区及大区试验。结果显示,小区试验末次用药后7 d 6.5%芳姜黄酮乳油稀释150倍液处理组防治效果为75.01%,显著优于对照药剂防治效果(P<0.01)。大区试验结果与小区试验结果趋势一致。说明6.5%芳姜黄酮乳油防治草莓白粉病效果良好,且对草莓植株安全,是一种具有开发潜力的新型植物源杀菌剂。展开更多
基金supported by the Science Foundation of Heilongjiang Province of China(No.QC2014C012)the Fundamental Research Funds for the Central Universities(NO.2572016CA11)
文摘Different concentrations of jasmonic acid(JA)and benzothiadiazole(BTH) were sprayed on 2-year-old Rosa rugosa‘Plena’ seedlings. The induced resistance of JA and BTH to Sphaerotheca pannosa(Wallr.) and the changes of their related physiological indices were investigated. Results showed that JA and BTH treatments had inhibitory impacts on S. pannosa infection. The optimal concentration of JA and BTH was 0.5 mmol/L for the disease-resistance induction of the leaves, its inductive effect was up to 66.36% for BTH and 54.49% for JA. Our results confirmed that exogenous JA and BTH significantly improved R. rugose ‘Plena’ resistance to S. pannosa. When treated with JA and BTH, activities of the three defense enzymes(POD, PPO, and PAL) increased significantly.Contents of total phenolics, flavonoids, and lignin also increased significantly. It is inferred from these results that exogenous JA and BTH could improve the resistance of R.rugose ‘Plena’ to S. pannosa through enhancing activities of the defensive enzymes and accumulation of secondary metabolites in the leaves.
文摘The researches through Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM) indicated that Sphaerotheca pannosa directly intrude in the place of concave of rose leaves,form filiform haustorium in the epidermal cells,absorb the nutrient and water,and destory the internal structure of mitochondrions,etc.when epidermal cells are filled with filiform haustorium.
文摘草莓白粉病是草莓生产中的常见病害。试验目的在于测试6.5%芳姜黄酮乳油对草莓白粉病的田间防治效果。用43%氟菌·肟菌酯悬浮剂和300 g/L醚菌·啶酰菌悬浮剂作为对照药剂,在上海市青浦区开展田间药效小区及大区试验。结果显示,小区试验末次用药后7 d 6.5%芳姜黄酮乳油稀释150倍液处理组防治效果为75.01%,显著优于对照药剂防治效果(P<0.01)。大区试验结果与小区试验结果趋势一致。说明6.5%芳姜黄酮乳油防治草莓白粉病效果良好,且对草莓植株安全,是一种具有开发潜力的新型植物源杀菌剂。
