October
1999
, Volume
83
, Number
10
Pages
949
-
953
Authors
D.
James
and
S. E.
Godkin
,
Centre for Plant Health, Canadian Food Inspection Agency, 8801 East Saanich Road, Sidney, B.C., Canada, V8L 1H3
;
F. R.
Rickson
,
Oregon State University, Corvallis 97331-2902
;
D. A.
Thompson
,
Centre for Plant Health, Canadian Food Inspection Agency, 8801 East Saanich Road, Sidney, B.C., Canada, V8L 1H3
;
K. C.
Eastwell
,
Washington State University, IAREC, 24106 Bunn Road, Prosser 99350
; and
A. J.
Hansen
,
Agriculture and Agri-Food Canada, Pacific Agri-Food Research Centre, Summerland, B.C., Canada, V0H 1Z0
Affiliations
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RelatedArticle
Accepted for publication 25 June 1999.
Abstract
ABSTRACT
Coiled, viruslike particles (spirions) were detected by electron microscopic examination of crude extracts from flowers, leaves, and/or roots of infected Prunus avium, P. mume, and P. serrulata. The particles were observed in ultrathin sections of lower epidermis, palisade, and spongy mesophyll cells of leaves of P. avium and P. mume. Spring (March and April) appears to be optimal for detection of the particles in both screenhouse and field-grown plants. The particles were successfully graft-transmitted to P. armeniaca (cvs. Luizet and Tilton), P. avium (cvs. Bing, F12/1, Mazzard, and Sam), P. mahaleb, and P. persica (cv. Elberta). Individual spirions measured 132 × 34 nm. The particles appear to be coiled forms of a filamentous virus. Filaments extending from some coiled particles were approximately 13 nm wide, with striations at a pitch of 3.24 nm. No disease symptoms or cytopathological abnormalities were associated with the presence of the particles in the Prunus species studied. The particles were not detected in virus-free control plants.
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The American Phytopathological Society, 1999