Complementation of bipartite begomovirus movement functions by topocuviruses and curtoviruses

Complementation of bipartite begomovirus movement functions by topocuviruses and curtoviruses 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Virology Springer Journals

Complementation of bipartite begomovirus movement functions by topocuviruses and curtoviruses

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Publisher
Springer-Verlag
Copyright
Copyright © 2001 by Springer-Verlag/Wien
Subject
Legacy
ISSN
0304-8608
eISSN
1432-8798
D.O.I.
10.1007/s007050170067
Publisher site
See Article on Publisher Site

Abstract

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.

Journal

Archives of VirologySpringer Journals

Published: Sep 1, 2001

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