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KMID : 1160220120400010079
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Mycobiology
2012 Volume.40 No. 1 p.79 ~ p.81
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Morphological and Molecular Characteristics of the Oak Tree Canker Pathogen, Annulohypoxylon truncatum
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Cha Jae-Yul
Heo Bit-Na
Ahn Soo-Jeong
Gang Guen-Hye
Park Chung-Gyoo
Kwak Youn-Sig
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Abstract
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Cankers are localized dead areas in the bark of stems, branches or twigs of many types of trees and shrubs, and are usually caused by fungi. We observed severe canker symptoms in oak trees located in Gyeongnam province in 2011. A total 31trees were discovered with cankers of varied size, with an average of 48.5 × 15.2 cm. Black, half-rounded globular mound shaped stromata were associated with the cankers, and the asci of the fungi associated with the cankers were cylindrical shaped with their spore-bearing parts being up to 84 μm in length. The average fungal ascospores size was 7.59 × 4.23 μm. The internal transcribed spacer sequence for the canker causing fungus showed 99% similarity to the sequence of Annulohypoxylon truncatum. In this study, the isolated fungus was precisely described and then compared with fungi of similar taxa.
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KEYWORD
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Canker, Oak tree, Xylariaceae
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