Abstract:
:ABSTRACT An isometric virus ca. 25 nm in diameter with angular contour was isolated from onion plants showing yellow leaf striping and necrotic tips. The virus was mechanically transmitted onto 28 species of indicator plants belonging to five families, viz. Amaranthaceae, Chenopodiaceae, Cucurbitaceae, Leguminosae, and Solanaceae where it causes ring spots, malformations, and/or tip necrosis. Cytopathological studies in infected Nicotiana benthamiana tissues revealed cytoplasmic inclusions resembling those caused by Artichoke yellow ringspot virus (AYRSV), a member of the family Comoviridae. Host range and symptomatology of the onion virus were also similar to AYRSV. A high seed transmission rate (20%) was found in onion. Reverse transcription-polymerase chain reaction using degenerate primers specific for the family Comoviridae allowed amplification of RNA-dependent RNA polymerase sequences, which upon sequence analysis and comparison with AYRSV isolates from Cynara scolymus (AYRSV-AtG) and Vicia faba (AYRSV-F) were highly similar, thus providing evidence that the nepovirus AYRSV is infecting onion in the field.
journal_name
Phytopathologyjournal_title
Phytopathologyauthors
Maliogka VI,Dovas CI,Lesemann DE,Winter S,Katis NIdoi
10.1094/PHYTO-96-0622subject
Has Abstractpub_date
2006-06-01 00:00:00pages
622-9issue
6eissn
0031-949Xissn
1943-7684journal_volume
96pub_type
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