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KMID : 0379120220500040255
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Korean Journal of Mycology
2022 Volume.50 No. 4 p.255 ~ p.262
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Isolation and Identification of an Unreported Fungal Species in Korea and Novel Ice Nucleation Active Fungus : Fusarium diversisporum
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Avalos-Ruiz Diane
Lim Gwang-Jae
Lim Seong-Keun
Ten Leonid N.
Kang In-Kyu
Lee Seung-Yeol
Jung Hee-Young
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Abstract
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In this study, the fungal strain KNUF-21-F39 was isolated from a declined apple tree (Malus domestica) in the Chungcheongbuk province in Korea. The strain KNUF-21-F39 presented a slow growth rate and a variety of macroconidia shapes and sizes ranging from ovoid to fusoid and 1- to 5-septate, primarily showing 3- and 4-septate, with “S” -shaped macroconidia rarely observed. The strain was identified based on morphological characteristics along with phylogenetic analysis performed using the internal transcribed spacer region (ITS) and partial sequences of translation elongation factor 1-α (tef1), RNA polymerase largest subunit (rpb1), and calmodulin (cal ) genes. The fungal strain KNUF- 21-F39 was identified as Fusarium diversisporum, which has not been previously reported in Korea. The ice nucleation activity (INA) of the strain was also evaluated, identifying the strain as positive for INA. This is the first report characterizing F. diversisporum as an IN-active fungal species.
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KEYWORD
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Apple tree, Fusarium diversisporum, Ice nucleation activity
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