Molecular Plant Pathology - Pathogen Profiles
Strawberry crinkle virus, a Cytorhabdovirus needing
more attention from virologists
Karin I. Posthuma, Anthony N. Adams and Yiguo Hong
Department of Entomology and Plant Pathology, Horticulture Research
International, East Malling, Kent, ME19 6BJ, UK.
||A member of nonsegmented, negative-sense, single-stranded
RNA viruses of the genus Cytorhabdovirus (type member: Lettuce
necrotic yellows virus), family Rhabdoviridae, order Mononegavirales.
Members of the family Rhabdoviridae can infect vertebrates,
invertebrates and plants.
||Virions are bacilliform, 74-88 nm in diameter and 163-383
nm in length with surface projections probably composed of trimers of the
glycoprotein G, occurring in the cytoplasm in either the coated or the
uncoated form (Fig. 1). The nucleocapsid is enclosed in a host-derived
envelope. Within the virion, the SCV genome consists of a single
negative-sense single-stranded RNA molecule of approximately 13 kb.
||The SCV genome encodes at least five proteins: the
nucleocapsid (N) protein (45 kDa), the matrix (M) protein (77 kDa), the
nonstructural protein [Ns, 55 kDa, also known as phosphoprotein (P) ], the
glycoprotein (G, 23 kDa) and the large (L) protein.
||The natural host range of SCV is limited to species of the
genus Fragaria L. Experimental hosts include Physalis pubescens
L., P. floridana Rydb., Nicotiana occidentalis, N.
glutinosa L. and N. clevelandi Gray. SCV also replicates in its
insect vectors Chaetosiphon fragaefolii Cockerell and C. jacobi
Hille Ris Lamberts. When injected as purified virus, SCV replicates in
aphids Hyperomyzus lactucae (L.), Macrosiphon euphorbiae
Thomas, Myzus ornatus Laing, Megoura viciae Buckton, and Acyrthosiphoa
of stunting, vein necrosis, chlorosis and leaf distortion in strawberry
cv. Royal Sovereign infected with Strawberry crinkle virus
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