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KMID : 0364820080440010063
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Korean Journal of Microbiology
2008 Volume.44 No. 1 p.63 ~ p.68
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Morphological and Phylogenetic Characteristics of a Nematophagous Fungus, Drechslerella brochopaga Kan-23
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Cho Chun-Hwi
Whang Kyung-Sook
Kim Yun-Ji
Kang Doo-Sun
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Abstract
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Strain Kan-23 was extracted from nematophagous fungi, which were isolated from the soil sample of oriental melon field. The strain exhibited the slow-growing characteristic forming conidia after prolonged incubation for 30 days. Morphological features of strain Kan-23 were observed under scanning electron microscope (SEM). It possesses erect conidiophores which contain 2~3 side branches, with each branch producing 5~10 conidia. The size of conidiophores were between 160~450 μm. Conidia were ellipsoidal with three septa[septum] in each conidium. Strain Kan-23 captured nematodes by means of giant constricting rings, which were observed in the glucose peptone agar medium. ITS region of rDNA sequence was analyzed. On the basis of the high sequence similarity of ITS region (99%), the Kan-23 strain was closely related to Drechslerella brochopaga (U51950). This is the first report on Drechslerella brochopaga as a nematophagous fungus in Korea.
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KEYWORD
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Drechslerella brochopaga, giant constricting ring, GPA medium, nematophagous fungi, rDNA ITS
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