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KMID : 0379120140420040262
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Korean Journal of Mycology
2014 Volume.42 No. 4 p.262 ~ p.268
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Identification and Characterization of Paraconiothyrium brasiliense from Garden Plant Pachysandra terminalis
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Choi Min-Ah
Park Seung-Jun
Ahn Geum-Ran
Kim Seong-Hwan
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Abstract
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A fungal isolate DUCC5000 from a garden plant Pachysandra terminalis was identified as Paraconiothyrium brasiliense based on the results of morphological and molecular studies. The fungus formed brown to black conidiomata of (0.2-0.7)-2(-3.5) mm singly or as a group on PDA. Conidia measured 2-5×1.8-3 μm in size, hyaline, ellipsoid to short-ylindrical, and rounded at both ends. The internal transcribed spacer (ITS) DNA of the isolate shared 100% nucleotide sequence homology with those of known P. brasiliense isolates. Phylogenetic tree inferred from the ITS sequence analysis showed that the DUCC5000 isolate formed a clade with known isolates of P. brasiliense. The fungal mycelia grew better on oatmeal agar than on MEA and PDA. On PDA media under various pH conditions, fungal mycelial growth was observed at pH 9. Colony morphology of the fungus tended to alter depending on the kinds of nutrient media and pH condition. On chromagenic media, the fungus demonstrated its ability to produce extracellular enzymes including amyalse, avicelase, β-glucosidase, protease, and xylanase. However, in pathogenicity testing, no disease symptoms were observed on the leaves of P. terminalis. This strain is the first report on P. terminalis in Korea.
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KEYWORD
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Endophyte, Pachysandra terminalis, Paraconiothyrium brasiliense
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