Genetic diversity of Curtobacterium flaccumfaciens revealed by multilocus sequence analysis

  • R. M. Gonçalves
  • M. I. Balbi-Peña
  • J. M. Soman
  • A. C. Maringoni
  • G. Taghouti
  • M. Fischer-Le Saux
  • P. PortierEmail author


Bacterial wilt caused by Curtobacterium flaccumfaciens pv. flaccumfaciens is among the diseases that affect Phaseolus vulgaris L. This disease has been frequently detected in bean fields and causes severe production losses in Brazil. The aim of this research was to examine the genetic diversity existing among twenty-four isolates of C. flaccumfaciens collected from their native and alternative host, and a collection of sixty strains belonging to four phytopathogenic pathovars preserved at the French Collection for Plant-associated Bacteria (CIRM-CFBP) by multilocus sequence analysis (MLSA) based on six housekeeping genes (atpD, dnaK, gyrB, ppK, recA and rpoB). A phylogenetic tree with the concatenated sequences of six genes showed high genetic diversity among the strains. For instance, strains belonging to C. f. pv. flaccumfaciens do not cluster together within the species. Similar results were obtained with a minimal MLSA scheme using gyrB and recA, which we propose for reliable identification at the species level of Curtobacterium isolates. No correlation was identified between phylogeny and pathogenicity in the Curtobacterium flaccumfaciens strains analyzed in this work. The specific primers CffFOR2 and CffREV4 designed by Tegli et al. (Letters in Applied Microbiology, 35(4), 331–337, 2002) to detect C. f. pv. flaccumfaciens in naturally infected bean seeds proved to be efficient for the detection of bean-pathogenic strains.


gyrB MLSA Phylogeny recA Curtobacterium 



The authors would like to thank CAPES (Coordination for the Improvement of Higher Education Personnel-Brazil) for financial support and Cécile Dutrieux, Karine Durand, and Armelle Darrasse for technical assistance and thoughtful discussions. The authors thank the reviewers of the first version of this paper for their very helpful comments, and Jason Shiller for the text review.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

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Supplemental Figure 1 (DOCX 144 kb)
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Supplemental Figure 2 (DOCX 328 kb)
10658_2018_1648_MOESM3_ESM.xlsx (14 kb)
Supplemental Table 1 (XLSX 14 kb)


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Copyright information

© Koninklijke Nederlandse Planteziektenkundige Vereniging 2018

Authors and Affiliations

  • R. M. Gonçalves
    • 1
  • M. I. Balbi-Peña
    • 2
  • J. M. Soman
    • 3
  • A. C. Maringoni
    • 3
  • G. Taghouti
    • 4
  • M. Fischer-Le Saux
    • 4
  • P. Portier
    • 4
    Email author
  1. 1.Instituto Federal de Educação, Ciência e Tecnologia de Minas GeraisSanta LuziaBrazil
  2. 2.Departamento de Agronomia, Universidade Estadual de Londrina (UEL)LondrinaBrazil
  3. 3.Faculdade de Ciências AgronômicasUniversidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP)BotucatuBrazil
  4. 4.IRHS, INRA, AGROCAMPUS-Ouest, Université d’Angers, SFR 4207 QUASAV, CIRM-CFBPBeaucouzé cedexFrance

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