Genome expansion and gene loss in powdery mildew fungi reveal tradeoffs in extreme parasitism - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Journal Articles Science Year : 2010

Genome expansion and gene loss in powdery mildew fungi reveal tradeoffs in extreme parasitism

Nicolas J. Talbot
  • Function : Author
Christian Ametz
  • Function : Author
Geraint R Barton
  • Function : Author
Maike Both
  • Function : Author
Claire Hoede
Giovanni Montana
  • Function : Author
Francis Parlange
  • Function : Author
Hadi Quesneville
Thomas Wicker
  • Function : Author

Abstract

Powdery mildews are phytopathogens whose growth and reproduction are entirely dependent on living plant cells. The molecular basis of this life-style, obligate biotrophy, remains unknown. We present the genome analysis of barley powdery mildew, Blumeria graminis f.sp. hordei (Blumeria), as well as a comparison with the analysis of two powdery mildews pathogenic on dicotyledonous plants. These genomes display massive retrotransposon proliferation, genome-size expansion, and gene losses. The missing genes encode enzymes of primary and secondary metabolism, carbohydrate-active enzymes, and transporters, probably reflecting their redundancy in an exclusively biotrophic life-style. Among the 248 candidate effectors of pathogenesis identified in the Blumeria genome, very few (less than 10) define a core set conserved in all three mildews, suggesting that most effectors represent species-specific adaptations.
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Dates and versions

hal-02664949 , version 1 (31-05-2020)

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Pietro D Spanu, James C Abbott, Joelle J. Amselem, Timothy A. Burgis, Darren M Soanes, et al.. Genome expansion and gene loss in powdery mildew fungi reveal tradeoffs in extreme parasitism. Science, 2010, 330 (6010), pp.1543-1546. ⟨10.1126/science.1194573⟩. ⟨hal-02664949⟩
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