蜀葵锈病病原菌的鉴定  

Identification of the pathogen causing rust disease on Alcea rosea

作　　者：韦珊 陈旭君 廖晓晓 袁美瑜 封依依 李诚 WEI Shan;CHEN Xujun;LIAO Xiaoxiao;YUAN Meiyu;FENG Yiyi;LI Cheng(College of Agriculture,Key Laboratory of Agricultural Microbiology of Guizhou Province,Guizhou University,Guiyang 550025,China;College of Plant Protection,China Agricultural University,Beijing 100193,China)

机构地区：[1]贵州大学农学院,贵州省农业微生物特色重点实验室,贵阳550025 [2]中国农业大学植物保护学院,北京100193

出　　处：《植物病理学报》2024年第5期1054-1057,共4页Acta Phytopathologica Sinica

基　　金：贵州省科技拔尖人才项目(黔教技[2022]074号);贵州省基础研究计划(科学技术基金)项目(黔科合基础-ZK[2021]一般142)。

摘　　要：蜀葵(Alcea rosea L.),为锦葵科蜀葵属二年生直立草本植物,由于树姿及花色优美,观赏价值高,常被广泛种植于园林绿地中。2023年5月贵州省贵阳市绿化花坛部分蜀葵出现严重锈病病斑,蜀葵整个生育期均可观察到锈病发生,植株各部均可感染,病叶正面病斑褪绿变黄,呈近圆形凹陷状,背面出现黄色或黄褐色疱状凸起的冬孢子堆(图1-C-D),随着生长进程,孢子堆颜色变深变暗;叶柄和茎杆发病部位褪绿凸起,形成黄褐色冬孢子堆(图1-E-F)。As an important ornamental plant,hollyhock(Alcea rosea L.)plays an important role in landscape architecture.In May 2023,a new rust disease on A.rosea was observed in Guiyang,Guizhou Province.Rust infected various parts of A.rosea and seriously reduced the ornamental value.In this study,the teliospores were collected from the diseased leaves of A.rosea.Based on the morphological characteristics and phylogenetic analyses of internal transcribed spacer(ITS)and large subunit(LSU)sequences,the rust pathogen was identified as Puccinia modiolae.This is the first report of P.modiolae causing rust disease on A.rosea in China.These findings will promote further research on rust disease on A.rosea and provide a scientific basis for its control.

关 键 词：冬孢子堆 生长进程 蜀葵 褪绿 树姿 病叶 茎杆 贵州省贵阳市 

分 类 号：S432[农业科学—植物病理学]