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Lima SS, Abadio AKR, Araújo EF, Kitajima EW, Sartorato A, Vieira de Queiroz M. Mycovirus inPseudocercospora griseola, the causal agent of angular leaf spot in common bean. Can J Microbiol 2010; 56:359-65. [DOI: 10.1139/w10-022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Pseudocercospora griseola (Sacc.) Crous & Braun is a widespread fungal phytopathogen that is responsible for angular leaf spot in the common bean ( Phaseolus vulgaris L.). A number of fungal phytopathogens have been shown to harbour mycoviruses, and this possibility was investigated in populations of Pseudocercospora griseola. The total nucleic acid extracts of 61 fungal isolates were subjected to agarose gel electrophoresis. Small fragments (800–4800 bp) could be identified in 42 of the samples. The presence of dsRNA in isolate Ig838 was confirmed by treatment of total nucleic acid with DNase, RNase A, and nuclease S1. Transmission electron microscopy revealed the presence of viral-like particles 40 nm in diameter in the mycelia of 2 fungal isolates, namely 29-3 and Ig838. The transmission of dsRNA by means of conidia was 100% for isolate 29-3, but there was loss of 1–6 fragments of dsRNA in monosporic colonies of isolate Ig848. Cycloheximide treatment failed to inhibit the mycovirus in isolate 29-3, but proved efficient in the elimination of the 2.2, 2.0, 1.8, 1.2 and 1.0 kb fragments in 2 colonies of isolate Ig848. The occurrence of a mycovirus in Pseudocercospora griseola was demonstrated for the first time in the present study.
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Affiliation(s)
- Swiany Silveira Lima
- Departamento de Microbiologia, Instituto de Biotecnologia Aplicada a Agropecuária (BIOAGRO), 36570-000, Universidade Federal de Viçosa, Viçosa, MG, Brazil
- Departamento de Fitopatologia e Nematologia, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, C.P. 9, 13418-900, Piracicaba, SP, Brazil
- Empresa Brasileira de Pesquisa Agropecuária, Centro Nacional de Pesquisa de Arroz e Feijão, Departamento de Fitopatologia e Biologia Molecular, Rodovia Goiania/Nova Veneza, km 12 fazenda capivara, C.P. 179, Zona Rural 75375000, Santo Antonio de Goiás, GO, Brazil
| | - Ana Karina Rodrigues Abadio
- Departamento de Microbiologia, Instituto de Biotecnologia Aplicada a Agropecuária (BIOAGRO), 36570-000, Universidade Federal de Viçosa, Viçosa, MG, Brazil
- Departamento de Fitopatologia e Nematologia, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, C.P. 9, 13418-900, Piracicaba, SP, Brazil
- Empresa Brasileira de Pesquisa Agropecuária, Centro Nacional de Pesquisa de Arroz e Feijão, Departamento de Fitopatologia e Biologia Molecular, Rodovia Goiania/Nova Veneza, km 12 fazenda capivara, C.P. 179, Zona Rural 75375000, Santo Antonio de Goiás, GO, Brazil
| | - Elza Fernandes Araújo
- Departamento de Microbiologia, Instituto de Biotecnologia Aplicada a Agropecuária (BIOAGRO), 36570-000, Universidade Federal de Viçosa, Viçosa, MG, Brazil
- Departamento de Fitopatologia e Nematologia, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, C.P. 9, 13418-900, Piracicaba, SP, Brazil
- Empresa Brasileira de Pesquisa Agropecuária, Centro Nacional de Pesquisa de Arroz e Feijão, Departamento de Fitopatologia e Biologia Molecular, Rodovia Goiania/Nova Veneza, km 12 fazenda capivara, C.P. 179, Zona Rural 75375000, Santo Antonio de Goiás, GO, Brazil
| | - Elliot Watanabe Kitajima
- Departamento de Microbiologia, Instituto de Biotecnologia Aplicada a Agropecuária (BIOAGRO), 36570-000, Universidade Federal de Viçosa, Viçosa, MG, Brazil
- Departamento de Fitopatologia e Nematologia, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, C.P. 9, 13418-900, Piracicaba, SP, Brazil
- Empresa Brasileira de Pesquisa Agropecuária, Centro Nacional de Pesquisa de Arroz e Feijão, Departamento de Fitopatologia e Biologia Molecular, Rodovia Goiania/Nova Veneza, km 12 fazenda capivara, C.P. 179, Zona Rural 75375000, Santo Antonio de Goiás, GO, Brazil
| | - Aloísio Sartorato
- Departamento de Microbiologia, Instituto de Biotecnologia Aplicada a Agropecuária (BIOAGRO), 36570-000, Universidade Federal de Viçosa, Viçosa, MG, Brazil
- Departamento de Fitopatologia e Nematologia, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, C.P. 9, 13418-900, Piracicaba, SP, Brazil
- Empresa Brasileira de Pesquisa Agropecuária, Centro Nacional de Pesquisa de Arroz e Feijão, Departamento de Fitopatologia e Biologia Molecular, Rodovia Goiania/Nova Veneza, km 12 fazenda capivara, C.P. 179, Zona Rural 75375000, Santo Antonio de Goiás, GO, Brazil
| | - Marisa Vieira de Queiroz
- Departamento de Microbiologia, Instituto de Biotecnologia Aplicada a Agropecuária (BIOAGRO), 36570-000, Universidade Federal de Viçosa, Viçosa, MG, Brazil
- Departamento de Fitopatologia e Nematologia, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, C.P. 9, 13418-900, Piracicaba, SP, Brazil
- Empresa Brasileira de Pesquisa Agropecuária, Centro Nacional de Pesquisa de Arroz e Feijão, Departamento de Fitopatologia e Biologia Molecular, Rodovia Goiania/Nova Veneza, km 12 fazenda capivara, C.P. 179, Zona Rural 75375000, Santo Antonio de Goiás, GO, Brazil
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Chen L, Chen JS, Liu L, Yu X, Yu S, Fu TZ, Liu WH. Complete nucleotide sequences and genome characterization of double-stranded RNA 1 and RNA 2 in the Raphanus sativus-root cv. Yipinghong. Arch Virol 2005; 151:849-59. [PMID: 16369860 DOI: 10.1007/s00705-005-0685-8] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2005] [Accepted: 10/28/2005] [Indexed: 11/30/2022]
Abstract
Four distinct double-stranded (ds) RNA bands were extracted from leaves of Raphanus sativus-root cv. Yidianhong [corrected] with yellowing at the leaf edge in China. Purified viral particles of 28-30 nm in diameter contained dsRNA segments with the same number and mobility as these extracted directly from radish leaves. The two major dsRNA segments, namely RasR 1 and RasR 2, were 1866 and 1791 bp in length, respectively. Computer analysis predicted that they both contained a single open reading frame (ORF) on their plus-stranded RNA, putatively encoding a RNA dependent RNA polymerase and a capsid protein similar to that encoded by members of the family Partitiviridae. In addition, both RasR 1 and RasR 2 were highly conserved at the 5' untranslated regions (UTR) and had an adenosine-uracil rich stretch at the 3' UTR, with an identical terminal motif (5'-AAAAUAAAACC-3'). Taken together, these results suggest that the two major dsRNA segments constitute the genome of a partitivirus infecting radish.
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Affiliation(s)
- L Chen
- College of Life Sciences, Zhejiang University, Hangzhou, PR China
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