1887

Abstract

Summary

The properties of polyhedral double-stranded (ds)RNA virus particles obtained from eight isolates of the wheat take-all fungus, var. , have been investigated. Thirteen viruses and virus variants were distinguished and these were classified into three groups on the basis of serological and physical properties of the virus particles; viruses in a group were related serologically to other members of the same group, but unrelated serologically to members of other groups. Group I viruses had particles of diam. 35 nm sedimenting at 109 to 126S; the virus capsid contained one polypeptide species, mol. wt. 54 × 10 to 60 × 10 and virus dsRNA consisted of two to four components, mol. wt. 1.0 × 10 to 1·3 × 10. Group II viruses had particles of diam. 35 nm sedimenting at 133 to 140S; the virus capsid contained one polypeptide species, mol. wt. 68 × 10 to 73 × 10 and virus dsRNA consisted of two to four components with mol. wt. 1·39 × 10 to 1·60 × 10. Group III viruses had particles of diam. 40 nm sedimenting at 159 to 163S; the virus capsid contained three polypeptide species, mol. wt. 78 × 10, 83 × 10 and 87 × 10 and virus dsRNA consisted of two components, mol. wt. 3·2 × 10 to 4·3 × 10.

Five of the fungal isolates contained only single viruses. However, one isolate contained viruses from groups I and II, and two isolates each contained viruses from groups I, II and III. Investigation of virus from ten single conidial isolates derived from one of the latter isolates has shown that all three viruses were present in a single cell.

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/content/journal/jgv/10.1099/0022-1317-53-2-235
1981-04-01
2019-11-17
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http://instance.metastore.ingenta.com/content/journal/jgv/10.1099/0022-1317-53-2-235
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