菌物学报2025，Vol.44Issue(9)：1-15,15.DOI:10.13346/j.mycosystema.250085
引起北京古侧柏叶枯病的四种链格孢属真菌
Four Alternaria species causing leaf blight of ancient Platycladus orientalis in Beijing
摘要
Abstract
Ancient Platycladus orientalis holds significantly historical,cultural,and landscape ecological value.The species of the genus Alternaria are diverse and widely distributed in the world,and they are important pathogens causing leaf blight of P.orientalis.In this study,a large number of Alternaria isolates were collected from blighted leaf specimens of ancient P.orientalis in Beijing.Based on the morphological characteristics of conidia,conidiophores,and conidiogenous cells on PCA medium,in combination with phylogenetic analyses of the ITS,GAPDH,TEF1,RPB2,and ALT gene loci,these isolates were identified as Alternaria alternata,A.subcucurbitae,A.cantlous and a novel species,Alternaria platycladi.A.subcucurbitae and A.cantlous are reported on P.orientalis for the first time.Koch's postulates confirmed that all four Alternaria species could cause leaf blight of P.orientalis.关键词
古侧柏/链格孢属/病原鉴定/科赫氏法则/新种Key words
ancient Platycladus orientalis/Alternaria/pathogen identification/Koch's postulates/new species引用本文复制引用
焦宁,张哲,王婧妍,周宇菲,张英..引起北京古侧柏叶枯病的四种链格孢属真菌[J].菌物学报,2025,44(9):1-15,15.基金项目
国家自然科学基金(31971658,31770015,31370063) This work was supported by the National Natural Science Foundation of China(31971658,31770015,31370063). （31971658,31770015,31370063）
