枇杷溃疡病病原菌色二孢属的一个新种和一个新记录种  

A new species and a new Chinese record of Diplodia associated with canker disease on loquat in China

作　　者：李国清[1] 梁裕华 鲁林琴 刘菲菲 LI Guoqing;LIANG Yuhua;LU Linqin;LIU Feifei(Research Institute of Fast-growing Trees,Chinese Academy of Forestry,Zhanjiang 524022,Guangdong,China)

机构地区：[1]中国林业科学研究院速生树木研究所,广东湛江524022

出　　处：《菌物学报》2024年第6期29-42,共14页Mycosystema

基　　金：国家重点研发计划项目(2023YFD220100204,2023YFD220100205);广东省自然科学基金(2022A1515010874)。

摘　　要：色二孢属(葡萄座腔菌目,葡萄座腔菌科)包含许多与茎干溃疡病、枝枯病和顶梢枯死病相关的重要病原菌或潜在病原菌。该属多数物种地理分布广泛且能够侵染多种植物。本研究从云南省枇杷树溃疡病枝条上分离获得了13株色二孢属菌株。基于ITS、tef1和tub2基因片段系统发育分析和形态学特征观察,将这些菌株鉴定为Diplodia mutila和新种D.pipa。致病力试验结果表明,这两种真菌均可侵染枇杷幼苗,其中D.mutila比D.pipa表现出更高的致病性。这两种真菌是我国枇杷树上的首次报道。The genus Diplodia(Botryosphaeriales,Botryosphaeriaceae)comprises many important pathogens or latent pathogens associated with stem canker,shoot blights and die-back of plants across a wide geographic distribution.In this study,a total of 13 Diplodia isolates was obtained from diseased branches of loquat(Eriobotrya japonica)trees in Yunnan Province.Based on phylogenetic analyses of ITS,tef1 and tub2 loci,combined with morphological characteristics,two species were identified,D.mutila new to China and D.pipa sp.nov.The pathogenicity tests conducted on potted loquat trees demonstrated that both species can infect loquat trees,with D.mutila exhibiting a higher level of virulence as compared with D.pipa.To our knowledge,this is the first report of Diplodia from loquat trees in China.

关 键 词：葡萄座腔菌科 真菌分类 植物病原菌 致病性 果树 新种 

分 类 号：S436.67[农业科学—农业昆虫与害虫防治]