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Molecular and Serological Characterization of Iris Yellow Spot Virus, a New and Distinct Tospovirus Species

December 1998 , Volume 88 , Number  12
Pages  1,276 - 1,282

I. Cortês , I. C. Livieratos , A. Derks , D. Peters , and R. Kormelink

First, second, fourth, and fifth authors: Department of Virology, Wageningen Agricultural University, the Netherlands; and third author: Bulb Research Centre, Lisse, the Netherlands

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Accepted for publication 27 August 1998.

A new tospovirus was identified in iris cultivations in the Netherlands. Both serological comparisons and sequence determination of the S RNA demonstrate that this virus represents a new and distinct species, belonging to a separate serogroup, and for which the name iris yellow spot virus (IYSV) is proposed. The disease symptoms on iris are characterized by yellow spots on the leaves. Its experimental host range is very narrow and, in addition to iris, only includes Nicotiana benthamiana and Datura stramonium. The nucleoprotein of IYSV shows only 30 to 44% sequence identity with those of other tospoviruses identified so far; the highest homology being found with the tospovirus species of serogroup IV.

Additional keywords: Bunyaviridae , INSV , phylogenetic tree , TSWV .

© 1998 The American Phytopathological Society