Morfologia do vírus do mosaico do picão

Kitajima, Elliot W.; Carvalho, Ana Maria B.; Costa, A. S.

doi:10.1590/S0006-87051961000100013

Resumos

Preparações feitas com exsudato de plantas de fumo, girassol, picão, erva--de-Santa-Maria, cordão-de-frade, fedegoso. Chenopodium amaranticolor e Physalis floridana, sadias e infectadas pelo vínis do mosaico do picão, foram examinadas ao microscópio electrônico. Partículas com comprimento normal aproximado de 720 mm x 12-13 mm, foram encontradas nos exsudatos das oito espécies, quando afetadas, mas não nos das plantas sadias, testemunhas. Tais partículas são consideradas como sendo o vírus causador do mosaico do picão.

Electron microscopical observations were made on exudates obtained from plants of Bidrus pilosa, Chenopodium amaranticolor Leonolis nepaetifolia, Helianthus annums. Nicotiana tabucum, Cassia occidentalis, Chenopodium ambrosioides, and Physalis floridona infected with a virus that induces mosaic on the first named species. The presenes of a flexible thread with a normal length 720 mm. x 12-13 mm was recorded in the exudates from the: diseased plants, but not in those from the healthy ones, and is considered to represent the causal virus.

Elliot W. Kitajima; Ana Maria B. Carvalho; A. S. Costa

Engenheiros-agrônomos, Seção de Virologia, Instituto Agronômico

RESUMO

Preparações feitas com exsudato de plantas de fumo, girassol, picão, erva--de-Santa-Maria, cordão-de-frade, fedegoso. Chenopodium amaranticolor e Physalis floridana, sadias e infectadas pelo vínis do mosaico do picão, foram examinadas ao microscópio electrônico. Partículas com comprimento normal aproximado de 720 mm x 12-13 mm, foram encontradas nos exsudatos das oito espécies, quando afetadas, mas não nos das plantas sadias, testemunhas. Tais partículas são consideradas como sendo o vírus causador do mosaico do picão.

SUMMARY

Electron microscopical observations were made on exudates obtained from plants of Bidrus pilosa, Chenopodium amaranticolor Leonolis nepaetifolia, Helianthus annums. Nicotiana tabucum, Cassia occidentalis, Chenopodium ambrosioides, and Physalis floridona infected with a virus that induces mosaic on the first named species. The presenes of a flexible thread with a normal length 720 mm. x 12-13 mm was recorded in the exudates from the: diseased plants, but not in those from the healthy ones, and is considered to represent the causal virus.

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LITERATURA CITADA

Recebido para publicação em 30 de janeiro de 1961.

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