@ARTICLE{TreeBASE2Ref25815, author = {Tom Grafenhan and Peter Johnston and Martha M. Vaughan and Susan P. McCormick and Mark Busman and Todd J. Ward and Kerry O'Donnell}, title = {Fusarium pseudoacuminatum sp. nov. is a novel nivalenol mycotoxin-producing head blight pathogen from New Zealand }, year = {2016}, keywords = {Fusarium head blight, genotyping, morphology, pathogenicity, phylogenetics, RPB1, RPB2, trichothecene, zearalenone }, doi = {}, url = {http://}, pmid = {}, journal = {Mycologia}, volume = {}, number = {}, pages = {}, abstract = {We report on the molecular and morphological characterization of a novel B-type trichothecene toxin-producing species (i.e., B clade) recovered from litter in a maize field near Wellington, New Zealand, which is formally described herein as Fusarium pseudoacuminatum sp. nov. This species was initially identified as F. acuminatum employing morphological data; however, it differs from this species in that it produces longer macroconidia in which the apical cell is not as pointed, chlamydospores are not produced, and its colony growth rate on agar is much faster. Molecular phylogenetic analyses of portions of 13 genes that were mined from a whole genome sequence resolved F. pseudoacuminatum as the basal most species within the B clade. In silico translations of the trichothecene toxin gene cluster suggested that this isolate might possess the ability to produce the mycotoxin nivalenol because genes that determine this chemotype (i.e., Tri3, Tri7 and Tri13) appear to be functional. Consistent with this prediction, mycotoxin analyses demonstrated that it was able to produce 4-acetylnivalenol and 4,15-acetyl nivalenol, the nontrichothecene sesquiterpenes culmorin and hydroxyl culmorins, and the estrogen zearalenone in vitro. Results of a pathogenicity experiment revealed that F. pseudoacuminatum was able to induce moderate head blight on wheat.} }

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