@ARTICLE{TreeBASE2Ref24143, author = {Sandra Marielle Kahl and Andreas Ulrich and Albina A. Kirichenko and Marina E. H. Mueller}, title = {Segregation of Alternaria infectoria from small-spored Alternaria species isolated from wheat in a polyphasic classification}, year = {2015}, keywords = {Alternaria species group, taxonomic classification, TEF1-? sequence, Alternaria mycotoxins, wheat}, doi = {}, url = {http://}, pmid = {}, journal = {European Journal of Plant Pathology}, volume = {}, number = {}, pages = {}, abstract = {Alternaria species infect different cereals causing harvest losses and mycotoxin accumulation. To assess the species specificity of mycotoxin production and relationships among small-spored Alternaria isolates a comparative approach including morphology, secondary metabolites and gene sequences for 95 Alternaria strains isolated from wheat grains in Germany and Russia was undertaken. Alternaria isolates were sorted into the morphological species groups of A. alternata, A. arborescens, A. infectoria and A. tenuissima according to their three-dimensional sporulation pattern. Comparison of colony color and species group revealed a significant pattern as most of the bright isolates belonged to the A. infectoria species group. The examination of mycotoxin profiles resulted in two groups, one containing 92 % of the A. infectoria species group isolates showing a low mycotoxin production and the other cluster containing 77 % of the other species group isolates with a high mycotoxin production. The phylogenetic analysis via translation elongation factor 1-? revealed two clusters, one containing 96 % of the A. infectoria isolates and another cluster containing 79 % of the other species group isolates. The findings suggest that A. infectoria species group can be differentiated from the A. alternata, A. arborescens and A. tenuissima species groups by bright color, low mycotoxin production and by the phylogenetic features via TEF1-? gene. The isolates from Germany and Russia do not differ neither in species composition nor in a specific molecular cladification or in their mycotoxin production capacity. These results allow a reliable toxic risk assessment when detecting different Alternaria fungi on cereals.} }

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