Morphological and Phylogenetic Resolution of Diplodia neojuniperi Emerging Diplodia Top Dieback of Pinus thunbergii Parl. in China  

作　　者：Xiaolei Ding Ruiwen Zhao Sixi Lin Jianren Ye 

机构地区：[1]Co-Innovation Center for Sustainable Forestry in Southern China,College of Forestry,Nanjing Forestry University,Nanjing,210037,China

出　　处：《Phyton-International Journal of Experimental Botany》2022年第12期2813-2825,共13页国际实验植物学杂志（英文）

基　　金：supported by the National Natural Science Foundation of China 31800543(X.D).

摘　　要：In Bazhong City,Sichuan Province,China,top dieback symptoms were found on many pine trees(Pinus thunbergii Parl).The tips of old needles first turned grayish-green and then developed into brown bands in the field.Phylogenetic analysis of concatenated ITS and EF1-αindicated the pathogen of this dieback disease as Diplodia neojuniperi.Additionally,effects of temperature,pH and medium on the mycelial growth were also characterized.The most favorable temperature and pH level for mycelial growth are 25°C and 8,respectively.The optimal medium for mycelial growth is PDA medium.To our knowledge,this is the first report of D.neojuniperi causes Diplodia top dieback on Pinus thunbergii.Our results provide fundamental information for monitoring and preventing such disease in the future.

关 键 词：DIEBACK Koch’s postulates Diplodia neojuniperi phylogenetic analysis 

分 类 号：Q94[生物学—植物学]