Fusarium oxysporum Causes Root Rot on Gastrodia elata in Korea: Morphological, Phylogenetic, and Pathogenicity Analyses

Abstract

Gastrodia elata infected with root rot disease was collected from cultivated G. elata fields in Gimcheon, Korea, in 2018. G. elata tuber surfaces exhibited root rot disease symptoms of dark-grey lesions and white fungal mycelial growth. The fungus was isolated from symptomatic tubers and cultured. Based on morphological characteristics and molecular analysis of the internal transcribed spacer region of ribosomal DNA and translation elongation factor 1-alpha, the isolated fungus was Fusarium oxysporum. This is the first report of root rot caused by F. oxysporum on G. elata tubers in Korea.

Keywords

• fusarium oxysporum
• gastrodia elata
• pathogenicity
• root rot