Data/hora: 07/06/2024 13:11:21

Biblioteca(s): | Embrapa Soja.
Data corrente: | 29/05/2003
Data da última atualização: | 15/09/2004
Autoria: | ALMEIDA, A. M. R. SAKAI, J. SOUTO, E. R. KITAJIMA, E. W. FUKUJI, T. S.; HANADA, K.
Título: | Mosaic in Senna occidentalis in southern Brazil induced by a new strain of Soybean mosaic virus.
Ano de publicação: | 2002
Fonte/Imprenta: | Fitopatologia Brasileira, Brasília, v. 27, n. 2, p. 151-156, mar/abr. 2002.
Idioma: | Inglês
Conteúdo: | Plants of Senna occidentalis (sin. Cassia occidentalis) with mosaic symptoms were collected near a soybean (Glycine max) field where some plants exhibited symptoms of mosaic and blistering. A preliminary examination of leaf tissue from diseased S. occidentalis by electron microscopy revealed the presence of pinwheel inclusions as well as long flexuous particles, indicating the presence of a potyvirus. Host range, serology, and amino acid sequence from this potyvirus were similar to those from other Brazilian isolates of Soybean mosaic virus (SMV). The 3´- terminal region of the genomic RNA was cloned and a cDNA sequence of 1.9 kb upstream of the poly (A) tract was determined. The sequence contains a single open reading frame and a 3´- non-translated region (NTR) of 259 bp. The nucleotide sequence of the CP gene of SMV-Soc was 98% identical to that of Brazilian isolates SMV-B, SMV-L, and SMV-FT10. The percentage of nucleotide identity of their 3'-NTR's was 91, 98, and 99% in relation to SMV-L, SMV-B, and SMV-FT10, respectively. In contrast to other Brazilian SMV isolates studied, SMV-Soc was able to infect sunflower (Helianthus annuus). Based on these results, the S. occidentalis isolate was identified as a new strain of SMV belonging to the SMV strain, group G5 and was named SMV-Soc. This is the first report of naturaly occurring SMV infecting plants of S. occidentalis in Brazil, adding this weed as a new source of SMV in the field.
Thesagro: | Doença de Planta; Mosaico; Soja; Vírus.
Categoria do assunto: | --
URL: | http://www.scielo.br/pdf/fb/v27n2/9137.pdf
Registro original: | Embrapa Soja (CNPSO)
Exemplares: | CNPSO - (19914-1) - UPC - AP - -- -  -  -  - DIS