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KMID : 0379120150430030158
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Korean Journal of Mycology
2015 Volume.43 No. 3 p.158 ~ p.164
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Diversity of Mycotoxigenic Fusarium armeniacum Isolated from Rice Grains at Harvest Time in Korea
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Hong Sung-Kee
Lee Soo-Hyung
Lee Theresa
Ham Hyeon-Heui
Mun Hye-Yeon
Choi Hyo-Won
Son Seung-Wan
Ryu Jae-Gee
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Abstract
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A total of 509 rice panicle samples were collected at harvest time from fields in 8 provinces from 2010 to 2014. One hundred five grains per sample were plated on potato dextrose agar and 6,658 Fusarium isolates were obtained; among them, 67 were identified as Fusarium armeniacum by sequencing the translation elongation factor 1α (EF-1α) and confirmed by their morphological and cultural characteristics. Considerable variation in conidial size, colony color and EF-1α sequences was observed among the fungal isolates. The ability of 24 F. armeniacum isolates to produce T-2 and HT-2 toxin in potato sucrose agar was determined using liquid chromatography-mass spectrometry. Twenty one isolates produced T-2 and HT-2 toxin, resulting in varying toxin levels among the isolates. The results show that Korean isolates of F. armeniacum have diversity with respect to morphological, cultural, genetic, and toxigenic properties.
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KEYWORD
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Fusarium armeniacum, Grain, Rice, Toxin
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