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Strawberry mild yellow edge potexvirus from Strawberry in Korea
Cho, Jeom-Deog,Choi, Gug-Seoun,Chung, Bong-Nam,Kim, Jeong-Soo,Choi, Hong-Soo The Korean Society of Plant Pathology 2011 Plant Pathology Journal Vol.27 No.2
Symptoms induced in the leaves of strawberry (Fragaria x ananassa Duch.), 'Seolhyang' and 'Eyeberry', were mosaic, distortion and black colored edge on leaves at Nonsan area, one of the important production areas in Korea. Electron microscopy by quick-dip revealed the flexuous rod-shape particles having about 550-600 nm length. Cytoplasmic inclusion bodies composed of aggregated virus particles were observed frequently in mesophyll parenchyma and epidermal cells for the leaves of strawberry. The specific primers amplifying products of 635 bp and 729 bp were developed for RT-PCR detection of Strawberry mild yellow edge virus (SMYEV). Nucleotide identity of the CP gene of SMYEV was 92.8-99.2% with those of other SMYEV isolates from Gen-Bank database.
Cho, Jeom-Deog,Kim, Jeong-Soo,Park, Hong-Soo,La, Yong-Jun,Kim, Kyung-Soo The Korean Society of Plant Pathology 2000 Plant Pathology Journal Vol.16 No.4
Mixed infection of watermelon mosaic potyvirus II isolated from pumpkin (WMV-P) and cucumber green mottle mosaic tobamovirus from watermelon (CGMMV-W) caused extremely severe symptoms such as progressive silting and death of watermelon plants. Single infections of either WMV-P or CGMMV-W on the same hosts produced only vein clearing and/or mosaic on the upper leaves. In cells infected with WMV-P, potyvirus-characteristic inclusions of pinwheels, scrolls and cylindrical inclusions were present in the cytosol. Parallel arrays of virus particles in the tonoplast were also common. In cells infected with CGMMV-W, virus particles occurred as stacked-bands of scattered randomly in the cytosol and vacuoles in all type cells. Many cells also contained vesiculated mitochondria with fibril-containing vesicles. Cells infected mixedly with WMV-P and CGMMV-W contained structural features that were not observed in cells infected singly with the two viruses. A particle of WMV-P potyvirus was surrounded by evenly spaced nine particles of CGMMV-W tobamovirus, which made a unique nonagon ring. The angled layers having $60^{\circ}$-$135^{\circ}$ were alternating layer, herringbone, crosshatching and ladder figures.
Cho, Jeom-Deog,Park, Hong-Soo,Kim, Jeong-Soo,La, Yong-Jun,Kim, Kyung-Soo The Korean Society of Plant Pathology 2002 Plant Pathology Journal Vol.18 No.4
Mixed infections of two economically important viruses, Turnip mosaic virus(TuMV) in the family Potyviridae and Ribgrass mosaic virus(RMV) in the genus Tobamo-virus, were studied ultrastructurally on oriental cabbage. TuMV-ACl8 (alpine isolate in Korea) induced chlorotic spots on inoculated leaves of both ‘SSD63’ inbred line known as susceptible to TuMV, and ‘Tambok’ commercial cultivar, known as resistant to the virus, in the early stages of infection. TuMV-C5 (Taiwan isolate) caused severe mosaic and malformation on the upper leaves of ‘SSD63’, and necrotic spots in both inoculated and upper leaves of ‘Tambok’. RMV-CA1 (oriental cabbage isolate from alpine in Korea) induced vein chlorosis, leaf malformation, and midrib necrotic streak in the upper leaves of both ‘SSD63’ and ‘Tambok’. Both oriental cabbages infected with a combination of TuMV-ACl8 and RMV-CA1 showed synergistic symptoms of severe yellowing, severe mosaic, and necrotic spot or vein necrosis on their leaves. A combination of TuMV-C5 and RMV-CA1 produced synergistic symptoms only in ‘SSD63’. In ‘Tambok’ infected with the combination of TuMV-C5 and RMV-CA1, the number of necrotic spots on the inoculated leaves was one half lesser than that on singly infected with TuMV-C5. A few necrotic spots progressed systemically. In cells infected with a combination of TuMV-ACl8 and RMV-CA1 or TuMV-C5 and RMV-CA1, the particles of the two viruses made nonagon-like rings(NLR); one TuMV particle was surrounded loosely by nine RMV particles. Two unrelated viruses of TuMV and RMV were compacted in the central part of the spiral aggregates(SA) that was induced strikingly in cells by the mixed infections. The SA showed NLR in its center of the cross-sectioned side. Many particles of RMV of Tobamovirus were closely associated with Potyvirus-characteristic cylindrical inclusions. The SAs in the mixed infections were formed easily by the Potyvirus of TuMV-ACl8 or -C5 isolates.
Biological Characteristics and Nucleotide Relationships in Korean Tomato spotted wilt virus Isolates
Cho, Jeom-Deog,Kim, Jeong-Soo,Kim, Jin-Young,Choi, Gug-Seoun,Chung, Bong-Nam The Korean Society of Plant Pathology 2009 Plant Pathology Journal Vol.25 No.1
Tomato spotted wilt virus (TSWV) was identified from seven plants at two areas, Anyang and Dangjin, in Korea. The isolates of TSWV were seven as TSWV-KATm from tomato, TSWV-KAPo from potato, TSWV-KABal from balsam, TSWV-KACTm from cherry tomato and TSWV-KAIxe from Ixeris dentata at Anyang area, and TSWV-KDSe from sesame and TSWV-KDRP from red pepper at Dangjin area. Pathogenicity of seven TSWV isolates was various on the assay plants, and could not be grouped definitely. Three isolates of TSWV-KAIxe, TSWV-KACTm and TSWV-KABal had relatively narrower host ranges among the seven isolates. Percentage of nucleotide substitution in nucleotide sequences encoding nucleocapsid protein (NCP) was 1.2-1.7% among seven TSWV isolates and TSWV-KP. Korean TSWV isolates were divided into three groups by nucleotide homology or amino acid compositions. From the analysis of nucleotide sequences of Korean TSWV isolates compared with those of TSWV reported from other 5 countries including Japan, the Korean seven isolates of TSWV was grouped with German TSWV (D13926). No Korean TSWV isolates were grouped with those from The Netherlands, Brazil and USA.
Esterase 同位酵素, 蛋白質 및 形態的 特性에 의한 고구마 品種 分類
Deog Su Kim(金德洙),Sung Kun Oh(吳聖根),Moon Sup Chin(陣文燮),Jeom Ho Ryu(柳點鎬) 한국육종학회 1996 한국육종학회지 Vol.28 No.2
This study was conducted to utilize effectively similar varieties of sweet potato at the National Crops Experiment Station of Korea in 1994. Those were classified by esterase isozymes, proteins and some morphological characteristics. The results were as follows. The esterase isozymes in the leaves were similar in Kanto 95-1 and Kanto 95-2, Beniastma, Beniaka, Beniazuma and Benikomachi, Kintoki and Kintoki-2, Hongmi and Hongmi-2, High Starch and Hi-Starch. The esterase isozymes in the tuberous roots were similar in Beniastma and Beniaka, shiroshistma and Shiroshastma. The protein banding patterns in the tuberous roots were similar in Kanto and Kanto 95-1, Beniastma, Beniaka, Beniazuma and Benikomachi, Simon and Simon-2, High Starch and Hi-Starch. The morphological characteristics in the field were similar in Kanto 95 and Kanto 95-1, Beniastma, Beniaka, Beniazuma and Benikomachi, Simon and Simon-2, High Starch and Hi-Starch. Beniastma and Beniaka were appeared as the similar varieties because those had the same esterase isozymes in the leaves, tuberous roots and protein banding pattern in the tuberous roots, and some morphological characteristics in the field.
김덕수(Deog Su Kim),양원하(Won Ha Yang),신진철(Jin Chul Shin),김제규(Je Kyu Kim),류점호(Jeom Ho Ryu) 한국농림기상학회 2002 한국농림기상학회지 Vol.4 No.3
In Korean high yielding varieties developed by crosses between indica and japonica rice, the most limiting factor for yield increase may be attributed to the less number of tillers per unit area. The goal of this study is to find out the effect of the environmental factors as well as cultivation practice on the development and increase of tillers of Dasanbyeo, the high yielding indica/japonica hybrid cultivar. The effect of temperature was examined with 3 different light intensity, 220, 600, and 1220 μ㏖/s/㎡, respectively. For all the experiments, the leading japonica variety in Korea, Hwaseongbyeo, was used for the check cultivar for the comparison with Dasanbyeo. The increase of the tillers was more prominent in Dasanbyeo than in Hwaseongbyeo at 220 μ㏖/s/㎡ of light intensity, while the similar increase of tiller no. was found at 600 μ㏖/s/㎡ of light intensity treatment. However, Hwaseongbyeo showed more rapid increase of tiller at 1220 μ㏖/s/㎡ of light intensity. The mean number of the primary tiller ranged 5 to 7 in Dasanbyeo, and 2 to 7 in Hwaseongbyeo, showing greater variation in the latter case. However, the secondary tiller number ranged from 2 to 13 for the former, and 2 to 12 for the latter. The earliest initiation of tiller node of Dasanbyeo and Hwaseongbyeo was observed on 6 and 4 days after transplanting(DAT), respectively, at 600 μ㏖/s/㎡ of light intensity, while 10, and 7 DAT, respectively, at 1,220 μ㏖/s/㎡. No cultivar difference was observed at 600 μ㏖/s/㎡ with the 18 DAT. The ratio of effective tiller was lower in Dasanbyeo, ranging from 47 to 55% than in Hwaseongbyeo, ranging from 72 to 100%.
온도 수준에 따른 다수성 벼 품종 "다산벼" 의 분얼 특성
김덕수,양원하,신진철,류점호 한국농림기상학회 2001 한국농림기상학회지 Vol.3 No.1
In Korean high yielding varieties developed by crosses between indica and japonica rice, the most limiting factor for yield may be attributed to the less number of the tillers in the unit area. The goals of this study is to find out the effect of the temperature factors as well as cultural practices on the development and increase of tillers of Dasanbyeo, the high yielding indica crossed japonica cultivar. The effect of temperature was examined under controlled phytotron condition with 6 levels of temperature, 15, 17, 19, 22, 24, and 26℃, respectively, For the experiment, the leading japonica variety in Korea, Hwaseongbyeo, was used for the check cultivar for the comparison with Dasanbyeo. The high temperature also accelerated the initiation and termination of tiller development. The cultivar difference in the speed of tiller development was observed, for example, more rapid development of tiller in Dasanbyeo than in Hwaseongbyeo was observed at the high temperature range of 24-26℃, while the vice versa phenomena was observed at lower temperature range of 17-22℃. The first secondary tiller of Dasanbyeo was observed on the 16, 17, 23, 27 and 38 days after transplanting (DAT) at 26℃, 24℃, 22℃, 19℃, and 17℃, respectively. Those of Hwaseongbyeo was 19-22, and 26 DAT at 19-26℃ and 17℃, respectively. The last effective tiller of Dasanbyeo was observed on 27-33 DAT for the primary tiller, 20-41 DAT for the secondary tiller. Those of Hwaseongbyeo were 23-40 DAT for primary tiller, and 24-40 DAT for the secondary tiller.