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Cultural Characteristics of Xanthomonas axonopodis pv.citri Bacteriophages CP1 from Korea
명인식,남기웅,조용섭 한국식물병리학회 2002 Plant Pathology Journal Vol.18 No.6
Bacteriophage of Xantomonas axonopodis pv. citri, a causal agent of citrus canker disease, was studied for its cultural characteristics. The relative efficiency of plating (EOP) of 11 phages used to 13 strains of X. axonopodis pv. citri tested ranged from 0.8 to 1, indicating that the phages are homogeneous. Homogeneity of the phages suggests that citrusphage belongs to a single group CPK as reported in a previous study. Typical one-step growth of a phage P5 selected from the citrusphages was observed. The EOP of the P5 was dependent upon the media, pH, and temperature. It was observed that multiplication of the phage cultured in Wakimotos potato semisynthetic media at 25oC was more effective than that in other temperatures, regardless of the bacterial strains and media used. It was observed that pH 6.5 is optimal for multiplication of the phage. In comparison of the EOP among citrusphages CP1, CP2, and P5, multiplicative characteristic of phage P5 in the bacteria on time-course was similar with that of phage CP1. Thus, it was concluded that citrusphage group CPK from Korea is CP1 based on host specificity of the phage as described in a previous study, homogeneity, and its multiplication pattern.
명인식,남기웅,Hyeog-MoKwon 한국식물병리학회 2003 Plant Pathology Journal Vol.19 No.4
Dispersal of citrus bacterial canker caused by Xanthomonas axonopodis pv. citri on Unshiu orange was investigated in naturally infested nursery plots at Seogwipo in Jeju island, Korea. Based on phage detection, over 2% of the bacterial pathogen overwintered in canker lesions and started to multiply in late May. However, symptoms were first observed 1 month after the phage detection. The disease dispersed non-directionally to nearby plants possibly because of indirect dissemination of the bacterium by rain splashes. The disease increased from late June to late August and decreased thereafter. Population of phage increased constantly, however, disease occurrence somewhat fluctuated due to environmental factors. Disease incidence and severity were correlated with rainfall with wind that occurred 14-32 days earlier from late May to late August.
명인식,예완해,조원대,홍성기,박진우,심홍식,이영기,박경석,이상엽,이승돈,이수헌,최홍수,허성기,최효원,신동범,나동수 한국식물병리학회 2005 식물병연구 Vol.11 No.2
In 2004, average temperature was higher, and rainfall was less than those of previous year. The diseases of rice, barley, pepper, chinese melon, apple and oriental pear were surveyed. Seedling diseases, leaf blast, sheath blight and bacterial blight of rice, phytophthora blight, virus diseases and anthracnose of pepper, and sudden wilt syndrome and powdery mildew of chinese melon grown in plastic greenhouse were severe. Especially, sheath blight and bacterial blight of rice occurred two times higher than those of previous year. Panicle blight of rice decreased about 4 times, compared with the previous year, presumed that the lower rainy days, rainfall and RH suppressed spread of the fungal pathogens to panicles of rice. Lower rainfall during mid- and late Aug caused three-times less occurrence of phytophtora blight of red-pepper than that of the previous year. Another diseases surveyed occurred similar or less than those of the previous year. 2004년은 전년에 비해 기온이 높았고 강수량이 적었다. 벼 못자리 병, 잎도열병 발생 필지, 잎집무늬마름병, 흰잎 마름병과 고추 역병, 탄저병 및 바이러스병, 시설참외의 급성 시들음 증상, 흰가루병 등이 2003년에 비해 증가하였다. 특히 벼잎집무늬마름병과 흰잎마름병은 전년에 비해 2배 이상 병 발생이 증가하였다. 벼 이삭도열병이 전년 3%에서 2004년 0.7%로 감소된 것은 출수기 동안 평균기온은 높았으나 강수일수, 강수량 및 습도가 낮아 잎 도열병균이 이삭으로의 전파를 억제한 것으로 추정되었다. 고추역병은 전년에 비해 크게 감소되었다. 그리고 발표하지 않은 다른 병에 의한 피해는 다소 감소 혹은 유사한 수준이었다.
명인식,한성숙,조원대,홍성기,이영기,박경석,이수헌,예완해,박진우,이상엽,이승돈,최홍수,심홍식,최효원,김용기,신동범,나동수 한국식물병리학회 2006 식물병연구 Vol.12 No.3
In 2005, average temperature was lower, and average rainfall was less than those of previous year. The diseases of rice, barley, pepper, chinese melon, apple and oriental pear were surveyed. Bacterial blight, bacterial grain rot, and panicle disease of rice, black rot of pear, and white rot and bitter rot of apple were severe. Especially, brown rot of rice occurred four times higher than those of previous year. Panicle blight of rice increased about 3 times, compared with the previous year, presumed that the higher rainy days, rainfall and RH promoted spread of the fungal pathogens to panicles of rice. The diseases of rice leaf blast, sudden wilt syndrome, downy mildew and powdery mildew of chinese melon in plastic greenhouse, and virus diseases of hot pepper occurred distinctly less than those of the previous year. Another diseases surveyed occurred similar or less.
명인식,Myeong, In-Sik 한국작물보호협회 2009 자연과 농업 Vol.253 No.-
감자는 주성분인 녹말이 10~30% 정도 들어있는 알칼리성 식품이며 필수 아미노산을 골고루 함유하고 있다. 당분은 고구마에 비하여 적고 맛이 담백하여 주식으로 널리 이용된다. 무기질은 칼륨이 400mg%로 많고 Ca함량은 적다. 또 비타민 C는 15mg%이고 B1도 상당히 많아 겨울철의 비타민 공급원으로 중요하다.