Leaf spot of Hosta ventricosa caused by Fusarium oxysporum in China

Chunxia Wang; Hulei Zhang; Shenhai Wang; Shengfeng Mao

doi:10.7717/peerj.12581

Leaf spot of Hosta ventricosa caused by Fusarium oxysporum in China

PeerJ. 2021 Dec 7:9:e12581. doi: 10.7717/peerj.12581. eCollection 2021.

Authors

Chunxia Wang¹, Hulei Zhang¹, Shenhai Wang¹, Shengfeng Mao^{1

2}

Affiliations

¹ College of Forestry, Nanjing Forestry University, Nanjing, Jiangsu Province, China.
² Co-Innovation Centre for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, Jiangsu Province, China.

Abstract

Leaf spot of Hosta ventricosa is a new disease in China. This disease seriously affects the ornamental value and greening function of H. ventricosa. Identification of the causal agent can prevent and control leaf spot in H. ventricosa and promote the healthy development of the H. ventricosa industry. Known incidents of leaf spot of H. ventricosa occurred in three places, and samples were collected. After the fungus were isolated, its pathogenicity was tested according to Koch's postulates. Isolates ZE-1b and ZE-2b were identified as Fusarium oxysporum based on morphological features and multigene phylogenetic analyses of calmodulin (CMDA), RNA polymerase II subunit A (RPB1), RNA polymerase II second largest subunit (RPB2) and translation elongation factor 1-alpha (TEF1). These results provide a theoretical basis for the control of this disease of H. ventricosa.

Keywords: Fungi; Fusarium oxysporum; Hosta ventricosa; Multi gene phylogeny; New disease.

Grants and funding

This work was supported by the second batch of ideological and political demonstration courses of Nanjing Forestry University. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.