Research in Plant Disease 2006;12(1):15-19.
Published online April 30, 2006.
포도나무 갈색무늬병균(Pseudocercospora vitis (Lev.) Speg.)의 병원성과 침입기작
박종한, 한경숙, 이중섭, 서상태, 장한익, 김흥태
Pathogenicity and Infection Mechanism of Pseudocercospora vitis Causing Leaf Spot Disease on Grapevine in Korea
Jong Han Park, Kyeong Suk Han, Jung Sup Lee, Sang Tae Seo, Han Ik Jang, Heung Tae Kim
on the adaxial leaf surface with all isolates. The average incubation period was nine days, since all symptoms appeared from 8 to 10 days after inoculation. In order to know the mechanism of invasion of P. vitis to grapevine, the behavior of penetration hyphae through stomata were compared in two cultivars having different level of resistance. In order to know the mechanism of resistance of grape vine to P. vitis, two cultivars having different level of resistance were compared by counting the numbers and measuring size of the stomata per leaf. In a susceptible cultivar Campbell Early, the number of stomata was more than that of a resistance cultivar ``Kyoho``. In a susceptible cultivar ``Campbell Early``, the fungus entered readily into stomata after inoculation. However, in a resistant cultivar ``Kyoho``, the fungus seemed to pass over or surrounded only the guard cells. In comparison of height of guard cells of stomata between the two cultivars, significant differences were observed by scanning electron microscopy and light microscopy. The height of guard cells of ``Campbell Early`` showed a little higher than those of ``Kyoho`` known to be resistant to the fungus.
Key Words: Grapevine, Leaf spot, Penetration, Pseudocercospora vitis, Stomata

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