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Virus Department Instituto Agronômico, 13.100 Campinas, S.P. Brazil
Cytoplasmic inclusions, made up of a dense, finely granular matrix up to 3 to 4 µm in diam. were consistently found in ultrathin sections of leaf tissues from Fragaria vesca infected with strawberry vein-banding virus (SVBV). Isometric particles, usually with ring-like profiles, 40 to 45 nm in diam. were seen either embedded in the dense matrix or scattered in some electron-lucent areas of the inclusion. The particle morphology and the type of the inclusion found associated with SVBV places it in the cauliflower mosaic virus group.
* Present address: Dept. Biol. Celular, ICB, Univ. Brasilia, 70,000 Brasilia DF, Brazil.
Received 2 February 1973;
accepted 28 March 1973.
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