title: Phylogenetic analyses and toxigenic profiles of Fusarium equiseti and Fusarium acuminatum isolated from cereals from Southern Europe.
abstract: Fusarium equiseti and Fusarium acuminatum are toxigenic species that contaminate cereal crops from diverse climatic regions. They are common in Spanish cereals. The information available on their phylogenetics and toxigenic profiles is, however, insufficient to assist risk evaluation. In this work, phylogenetic analyses were performed using partial sequences of the translation elongation factor gene (EF-1α) of F. equiseti and F. acuminatum strains isolated from barley and wheat from Spain and other countries. The Northern and Southern European F. equiseti strains largely separated into two phylogenetically distinct clusters. This suggests the existence of two distinct populations within this species, explaining its presence in these regions of markedly different climate. Production of type A and B trichothecenes by the Spanish strains, examined in wheat cultures using a multitoxin analytical method, indicated that F. equiseti could produce deoxynivalenol and nivalenol and other trichothecenes, at concentrations that might represent a significant risk of toxin contamination for Southern European cereals. F. acuminatum showed low intraspecific genetic variability and 58% of the strains could produce deoxynivalenol at low level. Neither species was found to produce T-2 or HT-2 toxins. The present results provide important phylogenetic and toxigenic information essential for the accurate prediction of toxigenic risk.
authors.affiliation: Department of Genetics, Faculty of Biology, Complutense University of Madrid (UCM), José Antonio Novais 12, 28040 Madrid, Spain.
authors.forename: Patricia
authors.initials: P
authors.lastname: Marín
authors.forename: Antonio
authors.initials: A
authors.lastname: Moretti
authors.forename: Alberto
authors.initials: A
authors.lastname: Ritieni
authors.forename: Miguel
authors.initials: M
authors.lastname: Jurado
authors.forename: Covadonga
authors.initials: C
authors.lastname: Vázquez
authors.forename: M Teresa
authors.initials: MT
authors.lastname: González-Jaén
mesh_terms: D005060:Europe; D005506:Food Contamination; D005656:Fungal Proteins / Q000235:genetics; D005670:Fusarium / Q000145:classification / Q000235:genetics* / Q000302:isolation & purification / Q000378:metabolism*; D001467:Hordeum / Q000382:microbiology*; D008969:Molecular Sequence Data; D010802:Phylogeny; D014255:Trichothecenes / Q000096:biosynthesis*; D014908:Triticum / Q000382:microbiology*
chemical_list: D005656:Fungal Proteins; D014255:Trichothecenes