茶树新病害病原菌Phoma segeticola var. camelliae的形态学特征及系统学分析  

Morphological characterization and phylogenetic analysis of the pathogen Phoma segeticola var.camelliae causing a new tea disease

作　　者：赵晓珍[1,2] 王勇 李冬雪[1] 任亚峰 陈卓 ZHAO Xiao-zhen;WANG Yong;LI Dong-xue;REN Ya-feng;CHEN Zhuo(Key Laboratory of Green Pesticide and Agricultural Bioengineering,Ministry of Education,Guizhou University,Guiyang 550025,China;Guizhou Institute of Pomology,Guiyang 550006,China;College of Agriculture,Guizhou University,Guiyang 550025,China)

机构地区：[1]贵州大学绿色农药与农业生物工程教育部重点实验室,贵阳550025 [2]贵州省果树科学研究所,贵阳550006 [3]贵州大学农学院,贵阳550025

出　　处：《植物病理学报》2018年第4期556-559,共4页Acta Phytopathologica Sinica

基　　金：国家科技支撑计划专题(2014BAD23B03);贵州省科技重大专项[黔科合重大专项(2012)6012号];贵州省优秀科技青年人才培养计划项目(201341)

摘　　要：我国主要茶树病害种类近100种,对茶叶产量和品质带来较大的影响[1～3]。2016年3月至5月,受低温阴雨等天气因素影响,贵州部分高海拔地区的茶树病害发生率较高。课题组在贵州省石阡县茶园发现一种茶叶斑点病,对茶叶产量和品质影响较大。该病害初期表现在嫩叶或新梢,成叶也可被侵染。The tea leaf spot disease,which severely affected the quality and yield of tea leaves,was found in the tea region around Shiqian county,Guizhou Province.The isolate GZSQ-4 from tea leaf spot responsible for this new disease fulfilled Koch＇s postulate and was further identified as Phoma segeticola var.camelliae based on morphological characters,supplemented with phylogenetic analysis with multi-locus sequences,viz.,β-tublin （β-tub） ,RNA polymerase Ⅱ （RPB2） ,internal transcribed spacer （ITS）,and the 5＇ end of the nuclear ribosomal large subunit （28S） region.Our basic work on the pathogen of the new foliar disease is an important step in the development of disease management strategies.

关 键 词：病害种类 形态学特征 茶树 病原菌 学分 系统 茶叶产量 品质影响 

分 类 号：S432.44[农业科学—植物病理学]