Min Ah Choi, Seung Jun Park, Geum Ran Ahn and Seong Hwan Kim*
Department of Microbiology, Dankook University, Cheonan 330-714, Korea
Correspondence to piceae@naver.com
Korean Journal of Mycology (Kor J Mycol) December 30, 2014, 42(4):262-268.
https://doi.org/10.4489/KJM.2014.42.4.262
Received: September 23, 2014; Revised: November 4, 2014; Accepted: November 13, 2014
Published: December 30, 2014.
© The Korean Society of Mycology
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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-cylindrical, 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.
Endophyte, Pachysandra terminalis, Paraconiothyrium brasiliense