Archives of Virology

, Volume 146, Issue 9, pp 1811–1819 | Cite as

Complementation of bipartite begomovirus movement functions by topocuviruses and curtoviruses

  • R. W. Briddon
  • P. G. Markham
Brief Report

Summary.

 The DNA A components of bipartite species of the genus Begomovirus (family Geminiviridae) encode all viral functions required for replication and encapsidation but require gene products encoded on DNA B for cell-to-cell movement in plants. We demonstrate that geminiviruses of the genera Curtovirus and Topocuvirus are able to trans-complement efficient movement of DNA A for two bipartite begomoviruses in the absence of their corresponding DNA B. It previously has been shown that DNA A can, at low efficiency and without inducing symptoms, spread in the absence of DNA B. The spread of DNA A independent of DNA B, following Agrobacterium-mediated inoculation, is shown to require coat protein whereas trans-complemented spread of DNA A can occur independent of the coat protein encoded on DNA A. The significance of these findings to our understanding of the geminiviral infection cycle is discussed.

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Copyright information

© Springer-Verlag/Wien 2001

Authors and Affiliations

  • R. W. Briddon
    • 1
  • P. G. Markham
    • 1
  1. 1.Department of Virus Research, John Innes Centre, Norwich, U.K.GB

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