水稻谷粒褐变致病菌禾谷镰孢菌丝生长特性研究

Study on Growth Characteristics of Fusarium graminearum in Rice Browning Ear

目的：研究水稻谷粒褐变致病菌禾谷镰孢菌丝生长特性。方法：采用生长速率法研究环境条件和营养条件对菌丝生长的影响。结果：不同的营养、温度、pH值等条件对菌丝生长有很大影响。菌丝生长最适温度为25％；菌丝生长最适的pH范围是7～8；全光照、连续振荡培养有利于菌丝的生长；不同碳源培养条件下菌丝生长以半乳糖、淀粉为较好，不同氮源条件下菌丝生长以硝酸铵、丙氨酸为较好。结论：从水稻褐变谷粒分离出禾谷镰孢菌研究其生长特性，为进一步深入开展水稻褐变穗病害防治提供科学依据。

Objective： The paper aimed to study growth characteristics of Fusarium graminearum the pathogen of Browning ear of grain. Method：Growth rate method was used to study environmental and nutritional con- ditions on hypha growth.Result：The results showed that nutrition,temperature and pH had significant effects on the hypha growth of the browning ear pathogen of grain.The optimal temperature of hypha growth was 25℃;The optimal pH of hyphal growth was 7~8;Light, continuous shaking had promotion effect on its growth;The best carbohydrates for hypha growth was galactose and starch under the different carbon source; The best nitrogen for hypha growth was ammonium nitrate and aminopropionic acid under the different ni- trogen source. Conclusion：Study on Growth characteristics of Fusarium graminearum in Rice Browning Ear, in order to further provide scientific basis for the prevention and control of diseases.