• The Plant Pathology Journal
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• 제38권2호
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• pp.167-174
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• 2022

Pseudomonas amygdali is a hemibiotrophic phytopathogen that causes disease in woody and herbaceous plants. Complete genomes of four P. amygdali pathovars were comparatively analyzed to decipher the impact of genomic diversity on host colonization. The pan-genome indicated that 3,928 core genes are conserved among pathovars, while 504-1,009 are unique to specific pathovars. The unique genome contained many mobile elements and exhibited a functional distribution different from the core genome. Genes involved in O-antigen biosynthesis and antimicrobial peptide resistance were significantly enriched for adaptation to hostile environments. While the type III secretion system was distributed in the core genome, unique genomes revealed a different organization of secretion systems as follows: type I in pv. tabaci, type II in pv. japonicus, type IV in pv. morsprunorum, and type VI in pv. lachrymans. These findings provide genetic insight into the dynamic interactions of the bacteria with plant hosts.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.186-186
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• 2022

Phytophthora root and stem rot (PRSR) and wildfire disease (WFD) of soybean are frequently observed in the field of South Korea. The most environmentally friendly way to control PRSR and WFD is to use soybean varieties with resistance to Phytophthora sojae (P. sojae) and Pseudomonas amygdali pv. tabaci. Plant germplasm is an important gene pool for soybean breeding and improvement. In this study, hundreds of soybean accessions were evaluated for the two pathogens, and genome-wide association analyses were conducted using 104,955 SNPs to identify resistance loci for the two pathogens. Of 193 accessions, 46 genotypes showed resistance reaction, while 143 did susceptibility for PRSP. Twenty SNPs were significantly associated with resistance to P. sojae on chromosomes (Chr.) 3 and 4. Significant SNPs on Chr.3 were located within the known Rps gene region. A region on Chr. 4 is considered as a new candidate resistance loci. For evalation of resistance to WFD, 18, 31,74,36 and 34 genotypes were counted by a scale of 1-5, respectively. Five SNP markers on Chrs 9,11,12,17 and 18 were significantly associated with resistance to P. amygdali pv. tabaci. The identified SNPs and genomic regions will provide a useful information for further researches and breeding for resistance to P. sojae and P. amygdali pv. tabaci.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2020년도 추계학술대회
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• pp.125-125
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• 2020

• 식물병연구
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• 제22권1호
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• pp.38-43
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• 2016

들불병은 콩의 주요 세균병 중 하나로 국내 콩 주요 재배지에서 꾸준히 발생되고 있지만 지금까지 발생 정도에 대한 보고가 없었다. 국내 콩 주요 재배지에서 들불병 발병 정도를 2014년과 2015년 2년간 조사하였다. 2014년 전국 조사에서는 조사한 30지역 중 19지역(수원, 영월, 괴산, 단양, 태안, 공주, 부여, 김제, 순창, 고창, 무안, 장흥, 안동, 청도, 칠곡, 경주, 예천, 영천, 합천)에서 들불병 발생을 확인하였으며, 2015년 전국 조사에서는 조사한 28지역 중 9지역(수원, 영월, 평창, 인제, 괴산, 단양, 충주, 무안, 안동)에서 들불병 발생을 확인하였다. 재배되고 있는 품종, 지역, 기후 조건에 따라 들불병 발병 차이가 났다. 서리태는 2014년과 2015년 모두 감수성을 보였으며 강수량이 많았던 2014년에 들불병의 발생이 2배 이상 증가하였음을 관찰할 수 있었다. 본 실험 결과 우리나라는 전국적으로 들블병균이 잠재해 있으며 비슷한 온도에서는 강수량이 들불병의 발생에 절대적인 영향을 준다는 것을 알 수 있었다.