First Report of Xenoroussoella triseptata Isolated from Soil in Korea

Jung-Joo Ryu1   Seung-Yeol  Lee12   In-Kyu Kang3   Leonid  N. Ten1   Hee-Young  Jung12,*   

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Abstract

A fungal strain, designated KNUF-20-NI009, was isolated from soil collected from Gunsan-si, Jeollabuk-do, Korea. The isolate showed cultural features typical of the genus Xenoroussoella. Colonies cultivated on malt extract agar were olivaceous-brown to pale olivaceous-white at the margins, with undersides of dark olivaceous to olivaceous-brown and a white margin. The conidia, with a size range of 2.7-5.1×1.6-3.3 µm (x̅=3.6×2.6 µm, n=50), were globoid to ellipsoid in shape, hyaline when immature, becoming light brown to golden-brown when mature, and characterized by 1 or 2 guttules. Multi-locus sequence analysis based on a combined dataset of internal transcribed spacer regions (ITS), large subunit rDNA (LSU), small subunit rDNA (SSU), translation elongation factor 1-alpha (TEF1α), and RNA polymerase II largest subunit (RPB2) sequences revealed KNUF-20-NI009 to be a strain of Xenoroussoella triseptata. This is the first report of this species in Korea.

Figures & Tables

Fig. 1.Cultural characteristics of KNUF-20-NI009 after 14 days of cultivation at 25℃. Colonies on (A, D) potato dextrose agar; (B, E) malt extract agar; (C, F) oatmeal agar. Upper (A, B, C) and lower (D, E, F) surfaces.