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  • Title: Induction of tobacco chlorosis by certain cucumber mosaic virus satellite RNAs is specific to subgroup II helper strains.
    Author: Sleat DE, Palukaitis P.
    Journal: Virology; 1990 May; 176(1):292-5. PubMed ID: 2330677.
    Abstract:
    Two satellite (sat) RNAs of cucumber mosaic virus (CMV), B2- and WL3-sat RNAs, which induce systemic chlorosis on tobacco, were inoculated onto tobacco with a number of CMV strains. Systemic chlorosis was observed only when these satellite RNAs were associated with subgroup II CMV strains. Infection of tobacco with various pseudorecombinants of subgroup I and II CMV strains, together with WL3- or B2-sat RNA, suggests that chlorosis is associated with RNA 2 of subgroup II CMV strains. Chlorosis was not induced when B2- or WL3-sat RNAs were inoculated onto tobacco with tomato aspermy virus. In contrast, the induction of chlorosis on tomato by B1-sat RNA did not show any clear dependence on the subgroup of its CMV helper strain although chlorosis did tend to be more severe in association with subgroup II CMV strains.
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