• 한국작물학회:학술대회논문집
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• 한국작물학회 2018년도 춘계학술대회
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• pp.21-21
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• 2018

• 한국작물학회:학술대회논문집
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• 한국작물학회 2018년도 추계학술대회
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• pp.212-212
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• 2018

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 춘계학술대회
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• pp.122-122
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• 2022

• 식물병연구
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• 제22권3호
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• pp.202-207
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• 2016

쌀은 세계에서 가장 중요한 작물 중의 하나이지만 충분한 비타민을 제공하지 않고, 벼 도열병과 흰잎마름병은 전 세계적으로 가장 큰 피해를 주고 있는 병해이다. 리보플라빈, 비타민 B2는 인간의 건강에 필수적인 영양소이며, 식물의 병원균에 대한 식물의 방어 활성화로 알려져 있다. 본 연구에서는 BioDoctor (Hyunnong Co., Ltd., Gokseong, Korea)라는 리보플라빈 기반 제품을 벼에 경엽살포했을 때, 주요 병해에 대한 저항성 유도 및 벼 체내에 비타민 함량이 증가되는지에 대한 가능성을 조사하였다. 온실검정에서 BioDoctor 제품 500배와 1,000배로 희석하여 경엽처리 결과 벼 도열병과 흰잎마름병에 대해 현저한 병 저항성을 유도하였다. 또한, BioDoctor를 처리한 알곡과 잎에서 통계적으로 유의한 수준으로 리보플라빈 함량이 검출되었다. 본 연구는 비타민인 리보플라빈이 함유된 BioDoctor가 벼 도열병과 흰잎마름병에 대해 병 저항성을 유도할 뿐만 아니라 쌀 곡류 내에 비타민 함량을 증가시키는 큰 잠재력을 가지고 있는 것으로 나타났다.

• The Plant Pathology Journal
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• 제34권5호
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• pp.393-402
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• 2018

Rice world production is affected due to the growing impact of diseases such as bacterial panicle blight, produced by Burkholderia glumae. The pathogen-induced symptoms include seedling rot, grain rot and leafsheath browning in rice plants. It is currently recognized the entrance of this pathogen to the plant, from infected seeds and from environmental sources of the microorganism. However, it is still not fully elucidated the dynamics and permanence of the pathogen in the plant, from its entry until the development of disease symptoms in seedlings or panicles. In this work it was evaluated the infection of B. glumae rice plants, starting from inoculated seeds and substrates, and its subsequent monitoring after infection. Various organs of the plant during the vegetative stage and until the beginning of the reproductive stage, were evaluated. In both inoculation models, the bacteria was maintained in the plant as an endophyte between $1{\times}10^1$ and $1{\times}10^5cfu$ of B. $glumae.g^{-1}$ of plant throughout the vegetative stage. An increase of bacterial population towards initiation of the panicle was observed, and in the maturity of the grain, an endophyte population was identified in the flag leaf at $1{\times}10^6cfu$ of B. $glumae.g^{-1}$ fresh weight of rice plant, conducting towards the symptoms of bacterial panicle blight. The results found, suggest that B. glumae in rice plants developed from infected seeds or from the substrate, can colonize seedlings, establishing and maintaining a bacterial population over time, using rice plants as habitat to survive endophyticly until formation of bacterial panicle blight symptoms.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2005년도 춘계 학술발표대회
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• pp.117-117
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• 2005

• 한국응용곤충학회지
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• 제14권1호
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• pp.7-12
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• 1975

벼 흰빛잎마름병의 병원균(Xanthomonas oryzae)을 이용하여 항생제의 일종인 Agrepto에 대한 약제저항성형성을 조사하기 위하여 세대 경과에 따른 약제처리효과를 Optical Density로 간접 측정하여 다음과 같은 결과를 얻었다. 1. Agrepto는 액체배양기에 첨가되었을 때 처리 제1세대 30ppm까지의 낮은 농도 처리에서도 세균증식에 현저한 저지 효과를 나타내었다. 2. 동일농도의 4세대간 처리에서 세대의 경과에 따라 세균 증식량이 현저히 증가하였고 증식율은 10ppm 처리구에서 보다 30ppm 처리구에서 더욱 뚜렷하였다. 3. 전세대 20ppm 처리구의 선발집단의 경우 세대가 경과할수록 더욱 내성의 증가 현상을 나타내었다. 4. 고농도 처리구에서 선발된 세균이 저농도처리구에서 선발된 세균의 경우보다 저항성 형성이 현저히 증가되는 경향을 보였다.

• 한국응용곤충학회지
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• 제17권1호
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• pp.37-40
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• 1978

한국에서 1920년경부터 1956년까지 재배되었던 조동지, 용천을 비롯한 74재내품종을 5개균군을 사용하여 저항성정도를 조사한 결과 1. 조동지, 용천, 애달, 용산, 대구, 밑다리, 풍옥을 포함한 69품종은 본병에 이병성인 금남풍군에 속하였다. 2. 흑수, 도입남, 황판은 황옥군이였다, 3. 남각, 강북도의 반응은 지금까지 알려지지 않았던 반응을 나타냈다. 4. 금남풍군에 속하는 69품종의 균군별 반응은 I균군이 $69.5\%$, II균군$99.9\%$, III균군$100\%$, IV균군$99.7\%$ V균군$99.8\%$로 놓은 발병주율을 보였다. 5. 황옥군에 속하는 3품종은 I균군 $1.7\%$ II균군 $98.8\%$, III 균군 $100\%$, IV균군 $100\%$, V균군 $1.4\%$로 판별품종의 반응과 비슷하였다.

• 한국자원식물학회지
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• 제10권2호
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• pp.128-134
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• 1997

This study was conducted to test on the resistance of varieties bred by crossing with Asominori to bacterial leaf blight. Nakdongbyeo and Dongjinbyeo which were susceptible to HB 9011, 8 resistant varieties including Ilmibyeo derived from Asominori and Asominori, Hwangok, 13 varieties including Chukoku 45 which were resistance to HB 9011, HB 9022 and HB 9033 were used to screen their res ponce depending on the various screening methods such as the true resistance, the secondary infection resistance and the disease common field test methods, and the results are as follows: Among 13 varieties tested, 11 varieties including llmibyeo showed tme resistance to HB 9011. Less than 1.0cm of disease lesion were developed on these varieties. Disease lesion was not developed on most of the Asominori lines including Daechongbyeo against IIB9011 and 1lmibyeo was also resistance to HB 9011, on this variety disease lesion area rate was 1.2%, and 7 varieties including Hwajinbyeo showed field resistance to HB 9022. Disease lesion area rate were 19.6% on Nakdongbyeo. 15.6% on Dongjinbyeo, from 3.0% to 2.4% on Asominori lines, and 0.5% on the Asominori when screened at disease common area. Disease was not developed on Keumnambyeo. Significant correlation coefficiences were found between the results from the test methods of the true resistance, the field resistance ancl the field resistance at disease common field tests on Asominori lines, but in some cases, even the varieties on which disease lesions developed, showed field resistance to HB 9022 and HB 9033.

• The Plant Pathology Journal
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• 제34권4호
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• pp.269-285
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• 2018

Bacterial leaf blight is a major disease of eucalypt, especially under nursery conditions. Different bacterial species have been associated with the disease in several countries, and despite its importance worldwide, it is not clear to date whether similar disease symptoms are caused by the same or by different etiological agents. In this study, 43 bacterial strains were isolated from blighted eucalypt leaves collected in different geographic areas of Brazil and inoculated onto a susceptible eucalypt clone. Polyphasic taxonomy, including morphological, physiological, biochemical, molecular, and pathogenicity tests showed that only certain strains of Xanthomonas axonopodis caused symptoms of the disease. Strains varied in their aggressiveness, but no correlation with geographic origin was observed. MLSA-based phylogenetic analysis using concatenated dnaK, fyuA, gyrB and rpoD gene sequences allocated the strains in a well-defined clade, corresponding to Rademarker's group RG 9.6. Inoculation of nineteen plant species belonging to seven botanical families with representative strain LPF 602 showed it to be pathogenic only on Eucalyptus spp, and Corymbia spp. Based on distinct biochemical and pathogenic characteristics that differentiate the eucalypt strains from other pathovars of the X. axonopodis species, here we propose their allocation into the new pathovar X. axonopodis pv. eucalyptorum pv. nov.