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배나무 검은무늬 病菌(Alternaria Kikuchiana TANAKA)의 菌體磨碎液과 培養濾液에 의한 類似病斑誘起와 種子發芽抑制效果
朴端基,金基淸 全南大學校 農漁村開發硏究所 1985 농어촌개발연구 Vol.20 No.-
This paper is a part of our effort to c1arify the reason why resistant varieties of pear in Naju area of Chonnam province have been broken down by Alternaria kikuchiana TANAKA which has never attacked the varieties. Effect on induction of resemblant black spot was investigated in 3 pear varieties, Isibsegi (Nijisseki), Mansamgil (Okusankichi) and HN-39 using mycelial homogenates and cultural filtrates of 3 isolates of A. kikuchiana isolated from each of their varieties. Resemblant black spot was induced more specifically in isolates of Isibsegi and HN-39 to variety Isibsegi, and isolate of Mansamgil to variety Mansamgil than any other relations when low concentration of mycelial homogenates or culture filtrates were treated in each pear varieties. In variety Isibsegi, it was induced more highly on young leaves than on matured ones, and in Mansamgil, vice versa. Substances contained in culture filtrates were stable to heat, and suppressed the seed germination of lettuce and tomato. From the results described above, it is consider I that break' down of resistant varieties occurred because of the difference of bost specific toxin caused by the differentiation of pathogenicity of A. kikuchiana.
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배나무 검은무늬 病菌(Alternaria Kikuchiana TANAKA)의 菌體磨碎液과 培養濾液에 의한 類似病斑誘起와 種子發芽抑制效果
朴端基,金基淸 전남대학교 한국농어촌개발연구소 1985 농산어촌개발연구 Vol.20 No.-
This paper is a part of our effort to c1arify the reason why resistant varieties of pear in Naju area of Chonnam province have been broken down by Alternaria kikuchiana TANAKA which has never attacked the varieties. Effect on induction of resemblant black spot was investigated in 3 pear varieties, Isibsegi (Nijisseki), Mansamgil (Okusankichi) and HN-39 using mycelial homogenates and cultural filtrates of 3 isolates of A. kikuchiana isolated from each of their varieties. Resemblant black spot was induced more specifically in isolates of Isibsegi and HN-39 to variety Isibsegi, and isolate of Mansamgil to variety Mansamgil than any other relations when low concentration of mycelial homogenates or culture filtrates were treated in each pear varieties. In variety Isibsegi, it was induced more highly on young leaves than on matured ones, and in Mansamgil, vice versa. Substances contained in culture filtrates were stable to heat, and suppressed the seed germination of lettuce and tomato. From the results described above, it is consider I that break' down of resistant varieties occurred because of the difference of bost specific toxin caused by the differentiation of pathogenicity of A. kikuchiana.
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