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감자 "추백"에 발생한 Tobacco mosaic virus의 특성
김정수 ( Joung Soo Kim ),김재현 ( Jae Hyun Kim ),최국선 ( Gug Seoun Choi ),채수영 ( Soo Young Choi ),김현란 ( Hyun Ran Kim ),정봉남 ( Bong Nam Joung ),최용문 ( Yong Mun Choi ) 한국식물병리학회 2003 식물병연구 Vol.9 No.2
An isolate of Tobacco mosaic virus (TMV) was isolated from potato cultivar ``Chubak`` showing vein clearing and mild mosaic at Namhae in Korea. This isolate, TMV-St, was differentiated from other tobamoviruses based on biological properties, serological relationships and nucleotide sequence analyses of coat protein genes. TMV-St caused typical symptoms on four indicator plants as compared to the tobamovirus of TMVU1, Pepper mild mottle virus (PMMoV), and Tomato mosaic virus (ToMV), which caused economic losses in Solanaceous vegetables, tomato, pepper, and eggplant. Remarkably, the TMV-St induced distinctly different symptom of systemic chlorotic spots on Chenophodium murale. On C. murale, Gomphorena globosa, and Nicotiana rustica, the four viruses were classed by the virulence of systemic or local infections. In serological test TMV-St antiserum showed a precipitation line with each other tabamovirus. The CP gene of TMV-St contain 477 nucleotides, and the nucleotides sequence was the most similar to that of TMV-U1.
TSWV 저항성 파프리카 품종 개발을 위한 분자 표지의 검정
김현정(Hyoun-Joung Kim),양희범(Hee-Bum Yang),정봉남(Bong Nam Chung),강병철(Byoung-Cheorl Kang) 한국원예학회 2008 원예과학기술지 Vol.26 No.4
The incidence of Tomato spotted wilt virus (TSWV) in pepper was recently reported and TSWV has been rapidly spreading in Korea. However, TSWV-resistant pepper cultivars have not been developed in Korea so far. To develop resistant cultivars, establishment of a reliable resistance screening method is most critical. Mechanical inoculation of TSWV is known to be very inefficient due to many escapes. Hence, deployment of molecular markers linked to the TSWV resistance gene (Tsw) will greatly improve efficiency of TSWV- resistant cultivar breeding. In order to deploy TSWV resistance-linked markers in a paprika breeding program, we applied previously developed molecular markers, which include five random amplified polymorphic DNA (RAPD) and one cleaved amplified polymorphic sequence (CAPS) markers, on six resistant and 11 susceptible paprika cultivars along with original TSWV-resistant materials, Capsicum chinense PI152225 and PI159236. In addition, several other markers close to the resistance locus (Tsw) were selected by a map comparison and applied on the same materials. Except for the CAPS marker SCAC568, no markers showed consistent polymorphisms between resistant and susceptible pepper materials. SCAC568 produced polymorphisms between three resistant cultivars of Zeraim and all susceptible cultivars. When the SCAC568 marker was applied on a BCF₁ population of 92 individuals, genotypes of SCAC568 were cosegregated with phenotypes in 90 individuals out of 92. These results demonstrate that SCAC568 can be deployed in pepper breeding programs in combination with TSWV-resistant cultivars from Zeraim.
Saccharomyces cerevisiae에서 GAL 또는 GAP 프로모터 조절에 의한 재조합 Inulinase의 발현 및 분비
남수완,임현정,정봉현,장용근 동의대학교 기초과학연구소 1997 基礎科學硏究論文集 Vol.7 No.1
To investigate the promoter effect on heterologous gene expression in S. cerevisiae, the recombinant plasmids pYI11, pYI12, pYI10-2, and pYIGP was constructed to contain the inulinase gene (INU1) as a reporter under the control of GAL10, GAL7, GAL1 and GAP promoters, respectively. When the yeasts transformants were cultivated on galactose-containing rich media, the cell growth reached to 36-39 OD_600 at 72 hours of cultivation. The specific growth rates of the cells harboring the four different plasmids decreased similarily : they dropped from 0.24 h^-1 during the glucose-consuming period to 0.04-0.10 h^-1 during the galactose-consuming period (gene expression phase for GAL promoter system). After the depletion of glucose, the expression of inulinase gene was started and reached to maximal levels of 4.3(GAL1 promoter), 4.0(GAL10 promoter), 3.8(GAL7 promoter), and 1.6(GAP promoter) unit/mL at 72 hours of cultivation. Based on the maximal expression level and activity staining on the plate, the promoter strength was in the order of GAL1, GAL10, GAL7, and GAP promoter. While the GAL-promoter systems showed a high plasmid stabilities of more than 78%, the GAP-promoter plasmid revealed a lower plasmid stability of 55%. Most of inulinase activity (98%) was found in the extracellular medium, indication that the secretion efficiency of inulinase is independent on the type of promoter.