Ageratum conyzoides: A host to a unique begomovirus disease complex in Cameroon

Walter N. Leke, Judith K. Brown, Maaike E. Ligthart, Naaem Sattar, Dominic K. Njualem, Anders Kvarnheden

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

Ageratum conyzoides (goat weed) is a widespread uncultivated species in Cameroon that exhibits leaf curl disease (LCD) symptoms suggestive of begomovirus infection. In Asia, different begomovirus-satellite complexes have been identified in A. conyzoides. The objective of this study was to determine the identity of the suspect begomoviruses and their associated satellites in A. conyzoides in Cameroon. The results indicated that all three symptomatic A. conyzoides plants examined were infected with a new begomovirus species, herein named Ageratum leaf curl Cameroon virus (ALCCMV). The ALCCMV genome sequences shared their highest identity, at 84.3-88.5%, with a group of tomato-infecting begomoviruses from West Africa. In addition, a betasatellite and an alphasatellite were cloned from the same symptomatic A. conyzoides plants. The betasatellite sequences shared limited sequence identity at 37% or less with the betasatellite Cotton leaf curl Gezira betasatellite, and the new betasatellite species is herein named Ageratum leaf curl Cameroon betasatellite (ALCCMB). The alphasatellite shared 80% nt identity with Tomato leaf curl Cameroon alphasatellite (ToLCCMA), and the new alphasatellite species is herein named Ageratum leaf curl Cameroon alphasatellite (ALCCMA). In addition, two fragments containing begomovirus-alphasatellite sequences were cloned from sample AGLI4, and they were related to the defecting interfering molecule (Y14167) associated with Ageratum yellow vein virus from Asia. These results suggest that the begomoviral-satellite complexes infecting A. conyzoides in Cameroon may be as complex or more so, to species and strains reported thus far from Asia.

Original languageEnglish (US)
Pages (from-to)229-237
Number of pages9
JournalVirus Research
Volume163
Issue number1
DOIs
StatePublished - Jan 1 2012

Keywords

  • Alphasatellite
  • Begomovirus
  • Betasatellite
  • Geminivirus
  • Virus ecology

ASJC Scopus subject areas

  • Virology
  • Infectious Diseases
  • Cancer Research

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  • Cite this

    Leke, W. N., Brown, J. K., Ligthart, M. E., Sattar, N., Njualem, D. K., & Kvarnheden, A. (2012). Ageratum conyzoides: A host to a unique begomovirus disease complex in Cameroon. Virus Research, 163(1), 229-237. https://doi.org/10.1016/j.virusres.2011.09.039