Work

Occurrence of Leaf Blight on Cosmos Caused by Alternaria cosmosa in Korea

Year: 2015

Type: article

Abstract: In 2011, a leaf blight disease was observed on cosmos (Cosmos bipinnatus) leaves in Nonsan, Korea. The causal pathogen was isolated and identified based on morphological and molecular approaches. Morphological characteristics of the pathogen matched well with the Alternaria cosmosa and also easily distinguishable from Alternaria zinniae reported from cosmos seeds by producing branched beak. Phylogenetically, the pathogen could not be distinguished from A. passiflorae based on the sequence analysis of a combined data set of Alt a1 and gpd genes. However, A. passiflorae was distinguished from the present species by having conidiophores with 4 to 5 conidiogenous loci. The results indicate that the present Alternaria species is A. cosmosa. Pathogenicity tests revealed that the isolate was pathogenic to the leaves of Cosmos bipinnatus. This is the first report of Alternaria blight disease caused by A. cosmosa on cosmos in Korea.

Source: The Plant Pathology Journal

DOI: 10.5423/ppj.nt.09.2014.0095

Authors: Jian Xin Deng, Ji Hye Lee, Narayan Chandra Paul, Hye Sun Cho, Hyang Burm Lee, Seung Hun Yu

Institutions: Yangtze University, Chungnam National University, Chonnam National University, Korea Ginseng Corporation (South Korea)

Language: English

Topic: Plant Pathogens and Fungal Diseases

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDG: Zero hunger

Open Access status: gold

Estimated APC paid: $850