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벼 종자 기생성 Pseudomonas avenae와 P.glumae의 검출을 위한 PCR 방법에 의한 종자검정
盧台煥,宋完燁,金炯武,蘇仁永 전북대학교 농업과학기술연구소 1995 農大論文集 Vol.26 No.1
Pseudomoas avenae and P. glumae were the causal pathogens of discoloration of rice seed in Korea. They caused the severe discoloration of rice seed thus affectted the quality and quantity of seeds. But similarities on symptom by them on the seeds and on morphology of phenotypically similar saprophytes on the media made the differenciation of them and seed assay difficult. To design, therefore, specific rapid seed assay for detecting and defferentiating them by PCR method, we selected optimal conditions, buffer, pH and extraction time, for buffer extraction and used the PCR method to rapidly identify the extracted and incubated each colony types. Incubation with 0.85% saline solution supplemented with Tween#20 (0.01%) for 2 hrs was selected as a optimal condition for extracting Pseudomonas spp. from seeds. Using this result, DNA from putative Pseudomonas spp. and saprophytes incubated on King's medium B was extracted and amplified with G1 and L1 primers. P. avenae and P. glumae showed characteristically polymorphic pattern, respectively, and saprophytes showed representative six types of completely different poly-morphic one.
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.