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A new flower breaking tobamovirus ofStreptocarpus

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Abstract

A virus was isolated fromStreptocarpus plants that showed colour breaking of the flowers. Initial diagnostic tests indicated that this virus was a member of the Tobamovirus genus. The virus could be transmitted mechanically to several test plants. Its stability in plant sap was in line with that of other tobamoviruses, i.e. infectivity was lost after 10 min incubation at 90 °C and after dilution to 10−8. In addition, the morphology of the virus was typical for tobamoviruses. The particles had a length of about 304 nm. On test plants, the virus fromStreptocarpus could be distinguished from 7 well-defined tobamoviruses.Nicotiana glutinosa showed the most characteristic symptoms. In agar double-diffusion tests and/or double antibody sandwich enzyme-linked immunosorbent assays, no cross reactivity was observed in heterologous combinations with these 7 and 3 other tobamoviruses. Mechanical inoculation of the virus to virus-freeStreptocarpus plants resulted in the appearance of flower breaking in about 50% of the plants. On the basis of these findings, it is concluded that the virus that causes flower breaking inStreptocarpus is a distinct member of the Tobamovirus genus, and the nameStreptocarpus flower-break virus is proposed.

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Authors and Affiliations

  1. Plant Protection Service, P.O. Box 9102, 6700 HC, Wageningen, The Netherlands

    J. Th. J. Verhoeven & J. W. Roenhorst

  2. DLO Research Institute for Plant Protection (IPO-DLO), P.O. Box 9060, 6700 GW, Wageningen, The Netherlands

    I. Bouwen

Authors
  1. J. Th. J. Verhoeven
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  2. I. Bouwen
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  3. J. W. Roenhorst
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Verhoeven, J.T.J., Bouwen, I. & Roenhorst, J.W. A new flower breaking tobamovirus ofStreptocarpus . Eur J Plant Pathol 101, 311–318 (1995). https://doi.org/10.1007/BF01874787

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  • DOI: https://doi.org/10.1007/BF01874787

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