Skip to Main content Skip to Navigation
Journal articles

Transcriptome of Aphanomyces euteiches: new oomycete putative pathogenicity factors and metabolic pathways.

Abstract : Aphanomyces euteiches is an oomycete pathogen that causes seedling blight and root rot of legumes, such as alfalfa and pea. The genus Aphanomyces is phylogenically distinct from well-studied oomycetes such as Phytophthora sp., and contains species pathogenic on plants and aquatic animals. To provide the first foray into gene diversity of A. euteiches, two cDNA libraries were constructed using mRNA extracted from mycelium grown in an artificial liquid medium or in contact to plant roots. A unigene set of 7,977 sequences was obtained from 18,864 high-quality expressed sequenced tags (ESTs) and characterized for potential functions. Comparisons with oomycete proteomes revealed major differences between the gene content of A. euteiches and those of Phytophthora species, leading to the identification of biosynthetic pathways absent in Phytophthora, of new putative pathogenicity genes and of expansion of gene families encoding extracellular proteins, notably different classes of proteases. Among the genes specific of A. euteiches are members of a new family of extracellular proteins putatively involved in adhesion, containing up to four protein domains similar to fungal cellulose binding domains. Comparison of A. euteiches sequences with proteomes of fully sequenced eukaryotic pathogens, including fungi, apicomplexa and trypanosomatids, allowed the identification of A. euteiches genes with close orthologs in these microorganisms but absent in other oomycetes sequenced so far, notably transporters and non-ribosomal peptide synthetases, and suggests the presence of a defense mechanism against oxidative stress which was initially characterized in the pathogenic trypanosomatids.
Document type :
Journal articles
Complete list of metadatas

Cited literature [71 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-00320699
Contributor : Bernard Dumas <>
Submitted on : Thursday, September 11, 2008 - 2:58:21 PM
Last modification on : Wednesday, June 17, 2020 - 3:42:03 PM
Long-term archiving on: : Thursday, June 3, 2010 - 8:17:35 PM

File

Gaulin_et_al_loS_One_2008.pdf
Publisher files allowed on an open archive

Identifiers

Citation

Elodie Gaulin, Mohammed-Amine Madoui, Arnaud Bottin, Christophe Jacquet, Catherine Mathé, et al.. Transcriptome of Aphanomyces euteiches: new oomycete putative pathogenicity factors and metabolic pathways.. PLoS ONE, Public Library of Science, 2008, 3 (3), pp.e1723. ⟨10.1371/journal.pone.0001723⟩. ⟨hal-00320699⟩

Share

Metrics

Record views

808

Files downloads

415