Potato virus X : A global potato‐infecting virus and type member of the Potexvirus genus Academic Article uri icon


  • Taxonomy

    Potato virus X is the type-member of the plant-infecting Potexvirus genus in the family Alphaflexiviridae.

    Physical properties

    Potato virus X (PVX) virions are flexuous filaments 460-480 nm in length. Virions are 13 nm in diameter and have a helical pitch of 3.4 nm. The genome is approximately 6.4 kb with a 5' cap and 3' poly(A) terminus. PVX contains five open reading frames, four of which are essential for cell-to-cell and systemic movement. One protein encodes the viral replicase. Cellular inclusions, known as X-bodies, occur near the nucleus of virus-infected cells.


    The primary host is potato, but it infects a wide range of dicots. Diagnostic hosts include Datura stramonium and Nicotiana tabacum. PVX is transmitted in nature by mechanical contact. USEFUL WEBSITE: https://talk.ictvonline.org/ictv-reports/ictv_online_report/positive-sense-rna-viruses/w/alphaflexiviridae/1330/genus-potexvirus.

published proceedings

  • Mol Plant Pathol

altmetric score

  • 9.7

author list (cited authors)

  • Verchot, J.

citation count

  • 2

complete list of authors

  • Verchot, Jeanmarie

publication date

  • March 2022