• 제목/요약/키워드: yellow mosaic

검색결과 161건 처리시간 0.029초

Role of Intergenic and 3'-Proximal Noncoding Regions in Coat Protein Expression and Replication of Barley yellow dwarf virus PAV

  • Moon, Jae-Sun;Nancy K. McCoppin;Leslie L. Domier
    • The Plant Pathology Journal
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    • 제17권1호
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    • pp.22-28
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    • 2001
  • Barley yellow dwarf virus PAV (BYDV-PAV) has a 5.7-kb positive-sense single-stranded RNA genome that contains six open reading frames (ORFs). BYDV-PAV produces three subgenomic RNAs (sgRNAs). The largest of which encodes the coat, 17-kDa, and readthrough proteins from two initiation codons. To investigate the role of intergenic and 3'-proximal noncoding regions (NCRs) in coat protein (CP) expression and BYDV-PAV replication, a full-length infectious cDNA of the RNA genome of an Illinois isolate of BYDV-PAV was constructed downstream of the Cauliflower mosaic virus-35S promoter. Linear DNA molecules of these cDNAs were infectious, expressed the 22-kDa CP, and produced both genomic RNA sgRNAs in ratios similar to those observed in protoplasts inoculated with viral RNA. The portion of 5'NCR of sgRNA1 between ORFs 2 and 3 was not required for, but enhanced translation of CP from ORF3. Mutants containing deletions in the NCR downstream of ORF5 failed to replicate in oat protoplasts. These results indicate that an intact 3$^1$NCR is required for BYDV-PAV replication.

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한국에서의 포플러 모자이크 바이러스 검출(検出) (Detection of Poplar Mosaic Virus in Korea)

  • 라용준;이창근;여운홍;황재우;심상영
    • 한국산림과학회지
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    • 제49권1호
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    • pp.32-33
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    • 1980
  • 1980년(年) 9월(月), 수원(水原) 임목육종연구소(林木育種硏究所)의 포플러묘포(苗圃)에 식재(植栽)되어 있는 Populus deltoides 클론중(中)에서 잎에 모자이크병징(病徵)을 나타내는 개체(個体)가 수본(數本) 관찰(觀察)되었다. 모자이크병(病) 반조직(班組織)의 즙액(汁液)을 dip법(法)에 의(依)해 2% 인산(燐酸)텅스텐으로 Negative염색(染色)하여 전자현미경(電子顯微鏡)으로 검경(検鏡)한 결과(結果), 외국(外國)에서 포플러 모자이크 바이러스로 보고(報告)된 것과 같은 크기를 가진 길이 660~670nm되는 바이러스잎자(粒子)가 다수(多數) 관찰(觀察)되었다.

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Mixed Infection of Sugarcane Yellow Leaf Virus and Grassy Shoot Phytoplasma in Yellow Leaf Affected Indian Sugarcane Cultivars

  • Nithya, Kadirvel;Parameswari, Balasubramaniam;Viswanathan, Rasappa
    • The Plant Pathology Journal
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    • 제36권4호
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    • pp.364-377
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    • 2020
  • Sugarcane is an important sugar crop contributes more than 80% of world sugar production. Mosaic, leaf fleck, and yellow leaf (YL) are the major viral diseases affecting sugarcane, amongst YL occurrence is widely reported in all the sugarcane growing countries. It is caused by Sugarcane yellow leaf virus (SCYLV) and detailed works were done on complete genome characterization, transmission, and management. However, in countries like Egypt, South Africa, Cuba, Mauritius and Hawaii, the disease was reported to the cause of sugarcane yellow leaf phytoplasma (SCYP) and/or SCYLV as single/combined infections. Hence, we have investigated in detail to identify the exact Candidatus phytoplasma taxon associated in Indian cultivars affected with YL. The sequencing results and the restriction fragment length polymorphism pattern of the PCR products using the universal phytoplasma primers confirmed presence of sugarcane grassy shoot (SCGS) phytoplasma (16SrXI group) in the YL-affected plants. Mixed infection of SCYLV and SCGS phytoplasma was estimated as 32.8% in YL affected plants. Evolutionary genetic relationship between SCYP and SCGS phytoplasma representatively taken from different countries showed that SCYP from South Africa and Cuba were diverged from others and had a highest similarity with SCGS phytoplasma. Although we wanted to identify SCYP from YL affected Indian sugarcane cultivars, the study clearly indicated a clear absence of SCYP in YL affected plants and we found SCYLV as the primary cause for the disease.

동부(Vigna sesquipedalis)에 발생하는 Blackeye Cowpea Mosaic Virus와 Cucumber Mosaic Virus에 관한 연구 (Blackeye Cowpea Mosaic Virus and Cucumber Mosaic Virus Causing Mosaic Disease on Asparagus Bean (Vigna sesquipedalis) in Korea)

  • 윤태규
    • 한국식물병리학회지
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    • 제3권4호
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    • pp.291-298
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    • 1987
  • 모자이크, 엽맥록대, 퇴록반점 등의 병징을 나타내고 있는 동부 (Vigna sesquipedalis)를 진주에서 채집하였다. 전자현미경에 의해 2종의 바이러스가 분리되어 이들의 기주범위, 조즙액중의 부활성화한계, 감염엽세포에 있어서 입자의 소재양식에 의하여 2종의 바이러스를 동정하였다. Blackeye cowpea mosaic virus (BICMV). 이 바이러스는 즙액접종에 의해 2과 7종의 검정식물에 감염이 확인되었다. 그러나 전신감염은 두과식물에 한했다. 내열성은 $50-60^{\circ}C$, 내희석성은 $10^{-4}-10^{-5}$, 내보존성은 1-6일이었다. 바이러스 입자의 형태는 길이 약 750nm의 사상형이다. 병엽 절편의 전자현미경적 관찰에서는 엽육세포의 세포질에서 사상 입자와 풍차상 및 환상의 봉입체가 확인되었다. Cucumber mosaic virus(CM V), 이 바이러스는 즙액접종에 의해 3과 9종의 검정식물에 감염이 확인되었다. 다른 CM V계와 달리 두과식물에도 전신감염을 했다. 이 바이러스 임자의 형태는 직경약 30nm의 입자이다. 감염엽의 전자현미경적 관찰에서는 엽육세포의 세포질 및 액포내에서 바이러스 입자의 응집상이 확인되었다.

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박과작물에 발생하는 파파야원형반점바이러스의 발생 보고 (Occurrence of Papaya ringspot virus Infecting Cucurbit Crops in Korea)

  • 진태성;김상목;고석주;이수헌;최홍수;박진우;차병진
    • 농약과학회지
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    • 제13권4호
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    • pp.298-308
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    • 2009
  • 안성에서 모자이크와 주름증상을 보이는 호박으로부터 사상형 바이러스가 분리되었으며, 생물학적 특성과 전자현미경 검정, RT-PCR 검정에 의해 파파야원형반점바이러스(Papaya ringspot virus) 수박계통(PRSV-W)으로 동정되었다. PRSV-W의 기주범위는 박과작물과 명아주과작물에 한정되었고 감수성 기주인 오이, 호박, 수박 등에는 녹색모자이크, 기형, 주름 등의 증상을 나타냈지만 명아주과의 기주에는 국부병징만을 나타냈다. 2001년에서 2003년에 걸쳐, 경기, 경북, 전남에서 다양한 작형의 박과작물이 재배되는 173지역에서 박과작물의 주요 바이러스인 PRSV, 수박모자이크바이러스(WMV), 쥬키니황화모자이크바이러스(ZYMV)와 오이모자이크바이러스(CMV) 등 4종 바이러스의 발생상황을 조사하였다. 173지역 중 107지역에서 수집한 시료로부터 바이러스 병징이 관찰되었으며 RT-PCR 검정 결과, 235점의 시료 중 206시료에서 3종의 바이러스가 검출되었다. 검출빈도는 WMV가 48%, ZYMV가 33%였으며, PRSV는 12%였다. 8종 PRSV 시료의 핵산과 외피단백질 아미노산을 분석하였다. 분석된 결과를 전세계의 다른 PRSV 계통과 유사도를 비교한 결과, 핵산은 88.6~97.3%, 아미노산은 95.1~99.3%로 조사되었다. 이들 분리주의 유연관계를 분석한 결과, PRSV-W는 남동 아시아 계통과 근연종으로 판명되었다.

Relationships Between Soil-Borne Virus Infection and Root Growth Damage in Korean Hulless Barley Cultivars

  • Park, Jong-Chul;Jonson, Gilda;Noh, Tae-Hwan;Park, Chul-Soo;Kang, Chon-Sik;Kim, Mi-Jung;Park, Ki-Hoon;Kim, Hyung-Moo
    • The Plant Pathology Journal
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    • 제25권3호
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    • pp.231-235
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    • 2009
  • Viral infections and root growth were examined to elucidate the relationship between viral resistance and root growth in 26 Korean hulless barley cultivars. Viral resistance was estimated in experimental filed of Honam agricultural research institute for 3 years. Length and number of seminal and adventitious roots were examined for evaluation of root growth in both field and green-house conditions 30 days after seeding. Dominant viral infection occurred in Korean hulless barley by Barley yellow mosaic virus (BaYMV) in fields; however, susceptible cultivars were infected by either BaYMV, Barley mild mosaic virus (BaMMV) or both. Only four cultivars, including Donghanchalssalbori, Kwangwhalssalbori, Namhossalbori and Naehanssalbori, presented stable resistance to viral infections. Susceptible cultivars to viral infection in fields showed shorter seminal root length and fewer adventitious root number than resistant cultivars. Resistant cultivars showed better root growth and significant difference in adventitious root length in green house conditions. Increase in the number of seminal roots in resistant cultivars was derived from decreased damage of roots by the viral infection compared to the susceptible cultivars.

대두에서 발생한 알파파 모자이크 바이러스의 분류동정에 관한 연구 (Identification of Alfalfa Mosaic Virus from Soybean)

  • 이순형;최용문;김정수;정봉조
    • 한국식물병리학회지
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    • 제1권1호
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    • pp.33-37
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    • 1985
  • 황록색줄무늬모자익과 줄기 정단부가 구부러지는 증상을 보이는 대두 이병주를 채집하여 지표식물검정, 충매전염, 물리적 성질 조사, 항혈청검정 및 전자현미경검경을 하였다. 지표식물검정결과 T. expansa와 Scotia에 국부병반반응, 동부, 완두, 명아주 등에 전신감염 증상을 일으켰다. 복숭아혹진딧물에 의한 전염율은 $90\%$였다. 물리적 성질은 내열성이 $60^{\circ}C$, 내희석성이 1,000배였고, 내보존성이 2일이었다. 바이러스를 순화하여 항혈청제조결과 1:1024의 역가를 보였으며 일본 바이러스연구소에서 분양 받고 AMV 항혈청과 양성반응을 보였다. 전자현미경검경 결과 대부분 길이가 60nm인 박테리아 모양의 바이러스 입자가 검경되었다.

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보리호위축병(BaYMV) 이병이 백동 쌀보리의 농업형질에 미치는 영향 (Influence of Barley fellow Mosaic Virus (BaYMV) on Agronomic Traits in Naked Barley cv, Baegdong)

  • 이중호;김양길
    • 한국작물학회지
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    • 제45권3호
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    • pp.181-184
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    • 2000
  • 보리호위축병(BaYMV) 상습 발병지에서 쌀보리인 백동을 공시하여 건전주와 이병주의 농업형질 등을 비교 조사한 결과를 요약하면 다음과 같다. 1. 보리호위축병에 이병된 주는 건전주에 비하여 SPAD 값이 13.7정도 낮은 값을 보였으며, 출수는 10-11일정도 지연이 되었고, 건물중이 75%, 간장은 68%, 수수가 49% 감소하였다. 2. 이병주의 절간장 감소는 이삭을 제외한 상부로부터 제1-6절간에서 나타났으며, 그 중 제3-5절간장에서 감소율이 75-80%로서 가장 켰다. 3. 보리호위축병에 의하여 망장이 17-19%, 입수가 47%, 천립중이 60%, 주당 입중이 78% 감소하였으며, 종실에서는 폭과 두께에서 감소되었고, 종피색의 색도에서는 명도는 낮았으나 적색도는 높게 나타났다.

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Occurrence of Bean common mosaic virus (BCMV) Infecting Peanut in Korea

  • Choi, Hong-Soo;Kim, Mi-Kyeong;Park, Jin-Woo;Cheon, Jeong-Uk;Kim, Kook-Hyung;Kim, Jeong-Soo;Karakacha Were Hassan;Choi, Jang-Kyung;Takanami Yoichi
    • The Plant Pathology Journal
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    • 제22권1호
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    • pp.97-102
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    • 2006
  • A virus causing vein banding, sometimes yellow mosaic and rugose symptoms on peanut was prevalent around Suwon, Korea. A survey conducted in the area found disease incidence, depending on cultivar, to range from 79 to $100\%$. The virus was found to be seed-transmissible in all the five peanut cultivars tested with transmission rates ranging from 2 to $16\%$. Host range analysis failed to differentiate 9 field isolates collected from different peanuts cultivars showing various symptoms. Inclusion bodies such as scroll, pinwheel and long laminated aggregates induced by the virus in host plant cells were similar to those induced by members of the Potyvirus subdivision III. The virus showed < $95\%$ homology with Bean common mosaic virus (BCMV), BCMV-BICMV/AzMV strains and only < $91\%$ with Desmodium mosaic virus. Based on biological characterization, electron microscopy and molecular analyses of a Korean isolate (Daewon 1), the virus was identified as peanut stripe strain of BCMV.

Incidence and Distribution of Virus Diseases on Cucumber in Jeonnam Province During 1999-2002

  • Ko, Sug-Ju;Lee, Yong-Hwan;Cha, Kwang-Hong;Lee, Su-Heon;Choi, Hong-Soo;Choi, Yong-Soo;Lim, Geun-Cheol;Kim, Kook-Hyung
    • The Plant Pathology Journal
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    • 제22권2호
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    • pp.147-151
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    • 2006
  • Disease incidences of cucumber virus diseases in Jeonnam province were 52.5%, 16.1%, 35.2%, and 50.9% in 1999, 2000, 2001, and 2002, respectively. Rod- and flexuous rod-shaped virus particles were observed with the frequencies of 63.2% and 10.5%, respectively from the samples collected in 1999 under EM observation. Rod-shaped virus particles are considered as tobamovirus while flexuous rod shaped particles are considered as potyviruses. To further confirm their nature, total of 312 diseased virus samples were collected from 2000 to 2002, and tested by RT-PCR. Disease incidences of tobamoviruses including Cucumber green mottle mosaic virus and Kyuri green mottle mosaic virus were 48.7% and 3.8%, respectively while those of potyviruses including Zucchini yellow mosaic virus, Papaya ringspot virus, and Watermelon mosaic virus were 15.7%, 9.3%, and 5.1%, respectively. Interestingly, Cucumber mosaic virus was hardly detected. About 5.8% of tested samples were infected with more than one virus. Tobamovirus infection was consistently observed from September to December regardless of planting time, whereas infection of potyviruses was observed in many cucumber cultivating areas where it was planted in September and October.