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J Gen Virol 74 (1993), 785-788; DOI 10.1099/0022-1317-74-4-785
© 1993 Society for General Microbiology
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Replication and encapsidation of the viroid-like satellite RNA of lucerne transient streak virus are supported in divergent hosts by cocksfoot mottle virus and turnip rosette virus

O. P. Sehgal1, R. C. Sinha2, D. L. Gellatly3, I. Ivanov3 and M. G. AbouHaidar3

1 Department of Plant Pathology, University of Missouri, Columbia, Missouri 65211, U.S.A.
2 Agriculture Canada, Ottawa, Ontario, Canada K1A 0C6
and3 Department of Botany, University of Toronto, Toronto, Ontario, Canada M5S 3B2

Cocksfoot mottle sobemovirus supports replication and encapsidation of the viroid-like satellite RNA (sat-RNA) of lucerne transient streak virus (LTSV) in two monocotyledonous species, Triticum aestivum and Dactylis glomerata. Additionally, LTSV sat-RNA replicates effectively in the presence of turnip rosette sobemovirus in Brassica rapa, Raphanus raphanistrum and Sinapsis arvensis, but not in Thlaspi arvense or Nicotiana bigelovii, indicating that host species markedly influence this interaction. Previous reports of the association between LTSV sat-RNA and helper sobemoviruses were limited to dicotyledonous hosts. Our results demonstrate that the biological interaction between these two entities spans divergent dicotyledonous and monocotyledonous species.

Received 11 August 1992; accepted 18 November 1992.


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