Wilt of Acer negundo L.caused by Fusarium nirenbergiae in China  

作　　者：Xianghui Zhao Huan Li Lifeng Zhou Fei Chen Fengmao Chen 

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

出　　处：《Journal of Forestry Research》2020年第5期2013-2022,共10页林业研究（英文版）

基　　金：The work was supported by the National Key Research and Development Program of China(Grant Number:2017YFD0600104).

摘　　要：Boxelder maple(Acer negundo L.)is widely grown as ornamental trees in China.In 2017 in Pizhou,Jiangsu Province,China,the boxelder maple trees suffered from a disease which caused wilting and yellowing leaves,rotted roots,and discolored xylem.The disease broke out from July to August.Seven fungal isolates were obtained from symptomatic tissue and tested for pathogenicity.Isolate An7 was isolated at high frequency from the discolored vascular tissues,which caused the wilt disease on healthy 2-year-old seedlings after inoculation and eventually killed all the seedlings.We conducted molecular analysis for An7,including the partial sequences of the rDNA internal transcribed spacer,calmodulin,RNA polymerase II second largest subunit and the translation elongation factor 1-αand evaluation of the variously sized conidia,chlamydospores and conidiophores and cultural traits.The pathogen was identified as Fusarium nirenbergiae,a member of the Fusarium oxysporum species complex.To our knowledge,this is the first report of F.nirenbergiae causing wilt on A.negundo in China.

关 键 词：Boxelder maple Fusarium oxysporum species complex Identification Pathogenicity test 

分 类 号：S763.7[农业科学—森林保护学]