1887

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Volume 85, Issue 12

Host-specific encapsidation of a defective RNA 3 of Free

Abstract

Defective (D) RNAs were generated in tobacco upon passage of two isolates of (CMV) initially derived from RNA transcripts of cDNA clones. In both cases, the D RNA was derived by a single in-frame deletion of either 339 or 411 nt within the gene of Fny-CMV RNA 3 or M-CMV RNA 3, respectively. The generation of D RNAs was rare and occurred with two CMV isolates, the virions of which were known to differ in physico-chemical properties. The Fny-CMV D RNA 3, designated D RNA 3-1, was maintained by passage together with Fny-CMV in tobacco, but was lost by passage in squash. D RNA 3-1 accumulated in the inoculated squash cotyledons but not in upper, systemically infected leaves. Virions purified from infected squash cotyledons or leaf mesophyll protoplasts did not contain D RNA 3-1. Therefore, the failure of D RNA 3-1 to accumulate in squash leaves systemically infected by CMV was due to a lack of encapsidation of the D RNA 3-1 and movement out of the inoculated leaves.

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2004-12-01
2023-09-23
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Host-specific encapsidation of a defective RNA 3 of Cucumber mosaic virus
J. Gen. Virol. 85, 3757 (2004); https://doi.org/10.1099/vir.0.80345-0
/content/journal/jgv/10.1099/vir.0.80345-0
/content/journal/jgv/10.1099/vir.0.80345-0
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