April
1999
, Volume
83
, Number
4
Pages
345
-
350
Authors
L.
Pozzer
and
I. C.
Bezerra
,
Embrapa/Hortaliças, Km 09, Rodovia Brasília Anápolis, CEP: 70.359-970, Brasília, DF, Brazil
;
R.
Kormelink
,
M.
Prins
, and
D.
Peters
,
Wageningen Agricultural University, Laboratory of Virology, Binnenhaven 11, 6709 PD, Wageningen, The Netherlands
;
R. de O.
Resende
,
Universidade de Brasília, Departamento de Biologia Celular, CEP: 70.919-970, Brasília, DF, Brazil
; and
A. C.
de Ávila
,
Embrapa/Hortaliças, Km 09, Rodovia Brasília Anápolis, CEP: 70.359-970, Brasília, DF, Brazil
Affiliations
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RelatedArticle
Accepted for publication 8 December 1998.
Abstract
ABSTRACT
A tospovirus from onion causing a disease known as “sapeca” by growers in Brazil was characterized. Symptoms on onion consisted of numerous eyelike spots on the leaves and flower stalks resulting in flower abortion. Nicotiana benthamiana and N. rustica were the only systemic hosts experimentally found. Double antibody sandwich enzyme-linked immunosorbent assay (DAS-ELISA) experiments demonstrated that this virus was serologically related to iris yellow spot virus (IYSV), a tospovirus recently described in the Netherlands. This virus, from onion, based on an amino acid sequence identity of 90.5% for the N gene protein, is regarded as a strain of IYSV and is designated IYSVBR This 10% divergence in the nucleocapsid protein may represent an adaptation of the virus to distinct ecological niches.
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© 1999 The American Phytopathological Society
