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Viroids

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Book cover Virus and Virus-like Diseases of Potatoes and Production of Seed-Potatoes

Abstract

Viroids are the smallest known infectious agents of several plant species and consist of a unique nucleic acid molecule. Viroid nucleic acid is a single- stranded, covalently closed, circular RNA molecule with a rod-like secondary structure, characterised by an alternated arrangement of double-helical regions and single-stranded loops (Gross, 1985). Viroid nucleic acids range from 250 up to 375 nucleotides (Symons, 1981; Flores, 1995). In potatoes, the potato spindle tuber viroid (PSTVd) is the only viroid reported, though the disease it causes has been known since 1922 (Martin, 1922). PSTVd was considered a virus with unusual properties until 1967, when Diener and Raymer (1967) determined that its properties suggested a free nucleic acid nature (Diener and Raymer, 1967). Several strains of PSTVd, with 356 to 360 nucleotides, have been reported (Puchta et al. 1990; Gross et al. 1978; Owens et al. 1992; Behjatnia et al. 1996). These strains can be grouped as mild, intermediate, and severe according to the symptoms they produce in potato and tomato.

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Authors and Affiliations

  1. The International Potato Center (CIP), Lima 12, P.O. Box 1558, Peru

    L. F. Salazar, I. Bartolini & A. Hurtado

Authors
  1. L. F. Salazar
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  2. I. Bartolini
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  3. A. Hurtado
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Editor information

Editors and Affiliations

  1. Department of Virology, Agricultural Research Organization, The Volcani Center, Bet Dagan, 50-250, Israel

    Gad Loebenstein

  2. Department of Plant, Soil and Entomological Sciences, University of Idaho, Moscow, 83844-2339, ID, USA

    Philip H. Berger

  3. Horticulture Research International, Wellesbourne, Warwiks, CV35 9EF, UK

    Alan A. Brunt

  4. National Program Staff, US Department of Agriculture, Agricultural Research Service, Beltsville, 20705-5137, MD, USA

    Roger H. Lawson

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© 2001 Springer Science+Business Media Dordrecht

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Salazar, L.F., Bartolini, I., Hurtado, A. (2001). Viroids. In: Loebenstein, G., Berger, P.H., Brunt, A.A., Lawson, R.H. (eds) Virus and Virus-like Diseases of Potatoes and Production of Seed-Potatoes. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-0842-6_16

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  • DOI: https://doi.org/10.1007/978-94-007-0842-6_16

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-010-3736-5

  • Online ISBN: 978-94-007-0842-6

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