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생강근경부패병균에 대한 특수이온의 영향 및 전기영동 양상
이왕휴,심형권,이두구 전북대학교 농업과학기술연구소 1996 農大論文集 Vol.27 No.1
Ginger(Zingiber officinale L.), a popular beverage crop, is one of the many distinctive products in Chonbuk province. Al and Fe ion content in several areas (Eunhari, Eouri, and Yulsori) were measured to investigate the incidence rate of rhizome rot. Al ion content of soil in ginger cultivated field was related with rhizome rot. Eunhari, 2,000-3,465ppm of Al ion in soil showed a lower rate of disease incidence. Al ion content of this area increased until august, but was rapidly decreased at the harvest season. Fe ion content of Yulsori field, high incidence rate of rhizome rot, contained greatly higher than those other fields. Another experiment was conducted to investigate supplemental Al+3 or Fe+3 In the medium, When 100ppm of Al+3 or Fe+3 was supplemented to 1/10 tryptic soy medium, Fusarium oxysporum f.sp. zingiberi was suppressed 6% compared to control. Pythium zingiberum was almost suppressed by supplemental 25ppm of Al+3 or 100ppm of Fe+3 in the medium. Electrophoresis was used for defection of these pathogens as follows. Infected ginger plant to Fusarium or Pythium showed different protein band at Rf 0.26 and 0.76, respectively. P. zingiberum also showed protein band at Rf 0.02, 0.16, 0.38, 0,45 and 0.60. Both peroxidase band and esterase band of P. zingiberum resulted in Rf 0.6,0.64, 0.67 and 0.13,0.21, 0.65, and 0.70, respectively.
宋完燁,金炯武,盧台煥,李斗求 전북대학교 농업과학기술연구소 1996 農大論文集 Vol.27 No.1
Twenty phenolic compounds originated from plants were tested in nutrient-broth bioassay for screening inhibitory activity to rice seedborne Pseudomonas avenae, P.glumae and Xanthomonas oryzae pv. oryzae. Flavone and esculetin strongly inhibited X. o. pv. oryzae only. Myricetin inhibited .P. glumae and X. o. pv. oryzae but showed strong minimal inhibition concentration and minimal bactericidal concentration under a concentration of 25μg/ml. Cinnamic acid ethylester, naringenin and phloretin showed significant inhibitory activity towards tested all strains of P. avenae, P. glumae and X. o. pv. oryzae. Cinnamic acid ethylester was moderately inhibitory (100-200 μg/ml) and naringenin (50- 200 μg/ml) and phloretin (25-50 μg/ml) were strongly inhibitory. At a concentration of 100 μg/ml, phloretin were found to be bactericidal to all the tested strains of three species.