菌物学报2026，Vol.45Issue(2)：73-84,12.DOI:10.13346/j.mycosystema.250162
由臭镰孢Fusarium foetens侵染引起的油桐根腐病
Fusarium foetens,the pathogen of Fusarium root rot of Vernicia fordii
摘要
Abstract
A new disease was found on Vernicia fordii with symptom of root rot in Dushan,Guizhou Province.The disease occurred most seriously at growth stage(May to July),primarily affecting the roots.The diseased plants initially showed wilting and leaves fade green to withered until plant death.The fungal community composition of the rhizosphere soil was analyzed from healthy and diseased plants.The result showed that mainly dominant phyla and genera in the rhizosphere soil of diseased and healthy plants were similar,but the relative abundance was absolutely different.Moreover,the genus Fusarium causing a wide range of plant diseases only appeared in the fungal community of rhizosphere soil of diseased V.fordii,with relative abundance accounting for 2.44%.The pathogens were isolated and purified through tissue isolation.Ten strains were isolated from the healthy junction of V.fordii rhizome suffering from typical root rot.Among them,strain AX-2 induced typical symptoms of root rot after being back-inoculated to the seedlings of V.fordii.The pathogen was subsequently isolated from the roots and stems of diseased plants.Its morphological characteristics were found to be consistent with those of the pathogen isolated from the field.Molecular identification further verified that this strain was identical to AX-2.Morphological characteristics and multi-loci(ITS+tef1-α+rpb2+CaM+tub2)phylogeny classified AX-2 as Fusarium foetens.The species is firstly reported as the pathogen of root rot in V.fordii.This study provides a theoretical foundation for investigating the infection characteristics and control strategies of root rot disease in V.fordii.关键词
油桐/根腐病/臭镰孢/形态特征/分子鉴定Key words
Vernicia fordii/Fusarium root rot/Fusarium foetens/morphological characteristics/molecular identification引用本文复制引用
王嘉,杨安仁,刘北平,高暝,赵耘霄,陈益存,汪阳东..由臭镰孢Fusarium foetens侵染引起的油桐根腐病[J].菌物学报,2026,45(2):73-84,12.基金项目
国家自然科学基金(32572095) （32572095）
浙江省万人计划科技创新领军人才项目(2022R52028) This work was supported by the National Natural Science Foundation of China(32572095)and the Ten Thousand People Plan of Science and Technology Innovation Leading Talent of Zhejiang,China(2022R52028). （2022R52028）
