Identification and pathogenicity of Colletotrichum truncatum causing yam anthracnose – A new record in China,Physiological and Molecular Plant Pathology

当前位置： X-MOL 学术 › Physiol. Mol. Plant Pathol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Identification and pathogenicity of Colletotrichum truncatum causing yam anthracnose – A new record in China
Physiological and Molecular Plant Pathology ( IF 2.7 ) Pub Date : 2024-02-23 , DOI: 10.1016/j.pmpp.2024.102246
Tianle Wang , Yunpeng Wang , Zhixian Geng , Jingwen Wei , Yingying Chang , Mo Zhu , Xiao Duan , Xiting Zhao

Yam ( spp.) is a significant tuber crop. In October 2022, yam ( Thunb.) leaves exhibiting typical anthracnose symptoms were observed at the Yam Germplasm Resource Nursery of Wen County, Jiaozuo City, Henan Province, China. The disease incidence was recorded at 92.05%. The symptoms manifested as brown to dark brown circular or irregular large spots on the leaves, some of which displayed noticeable irregular concentric rings. A total of 23 isolates were obtained, with JCHN023-1 and JCHN003 isolates being the representative. The pathogen was successfully re-isolated from lesions of inoculated leaves, fulfilling Koch's postulates. Morphologically, the conidia appeared colorless, crescent-shaped, circular blunt at both ends, and measured (15.2-) 18.2–30 (−34.1) × (2.1-) 2.3–3.9 (−4.2) μm in length (average = 24.1 × 3.1 μm) without septa. The setae were black-brown and exhibited 1-4 septa. Subsequently, a multigene phylogenetic analysis, involving internal transcribed spacer (ITS), partial actin (), chitin synthase 1 () and glyceraldehyde-3-phosphate dehydrogenase (), identified the fungus as . Inoculation of detached leaves from 10 varieties of confirmed their broad-spectrum pathogenicity to yam. This represents the first report of yam anthracnose caused by in China and provides a theoretical foundation for yam anthracnose prevention and control.

更新日期：2024-02-23

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南

全部期刊列表>>