江西农业大学学报2016，Vol.38Issue(5)：859-865,7.DOI:10.13836/j.jjau.2016121
青枯雷尔氏菌在芝麻植株内的分布及消长动态
Distribution and Dynamic Change of Ralstonia solanacearum in Sesame Plant
摘要
Abstract
Bacterial wilt of sesame is one of the most destructive soil⁃borne diseases in major sesame pro⁃duction areas of south China. To illustrate the distribution and the population dynamics of Ralstonia so⁃lanacearum in its infected sites of sesame seedlings,the population of R. solanacearum in the infected sesame seedlings treated by different methods were investigated in this study,including irrigating root inoculation,pin⁃prick inoculation and spontaneous infected in infected field,compared with the healthy control group.At the ini⁃tial stage,the total population of R. solanacearum increased rapidly in the infected sesame seedlings associated with symptoms on the sesame seedlings.However,the total population of R. solanacearum began to decline at the later period with severity of infection in sesame seedlings. The results indicated that the pathogenicity of R. so⁃lanacearum showed an increasing tendency on the infected sesame seedlings.No the pathogens of R. solanacearum were detected in all the healthy sesame seedlings by contrast with the sesame seedlings response to R. so⁃lanacearum,which indicated that asymptomatic infection of the seseame seedlings response to R. solanacearum did not existed.The population of R. solanacearum in its infected sites of the type Ⅱ and Ⅲ infected sesame seedlings treated respectively by irrigating root inoculation and spontaneous infected in infected field began to decrease progressively in contrast to the height of infected sites of sesame seedlings.But the population of R. so⁃lanacearum in its infected sites of the type Ⅰ infected sesame seedlings in the middle was higher than in its roots and stems.It was observed that a highly abundant polymorphism distribution of R. solanacearum presented in the infected sesame seedlings.The pathogens of R. solanacearum were detected under its infected sites of the type Ⅰ,Ⅱand Ⅲinfected sesame seedlings treated by pin⁃prick inoculation.This result showed that the mobil⁃ity of R. solanacearum in its infected sites of the infected sesame seedlings could move upwards and down⁃wards.关键词
芝麻植株/青枯雷尔氏菌/分布/消长动态Key words
sesame/Ralstonia solanacearum/distribution/dynamic change分类
农业科技引用本文复制引用
李信申,邓小强,黄瑞荣,华菊玲..青枯雷尔氏菌在芝麻植株内的分布及消长动态[J].江西农业大学学报,2016,38(5):859-865,7.基金项目
国家自然科学基金项目（31360428）、江西省自然科学基金项目（20132BAB204029）、江西省支撑计划重点项目（2012-1-BBF60015）和国家芝麻产业体系建设项目（ CARS-15-2-05） Project supported by the National Natural Science Foundation of China （31360428），the Natural Science Founda-tion of Jiangxi Province （31360428），the Jiont Key Support Program by Jiangxi Province （2012-1-BBF60015） and the National Sesame Seed Industry System Construction Project （）
