Abstract:
AIMS:To develop a DNA microarray for easy and fast detection of trichothecene- and moniliformin-producing Fusarium species. METHOD AND RESULTS:A DNA microarray was developed for detection and identification of 14 trichothecene- and moniliformin-producing species of the fungal genus Fusarium. The array could also differentiate between four species groups. Capture probes were designed based on recent phylogenetic analyses of translation elongation factor-1 alpha (TEF-1alpha) sequences. Particular emphasis was put on designing capture probes corresponding to groups or species with particular mycotoxigenic synthetic abilities. A consensus PCR amplification of a part of the TEF-1alpha is followed by hybridization to the Fusarium chip and the results are visualized by a colorimetric Silverquant detection method. We validated the Fusarium chip against five naturally infected cereal samples for which we also have morphological and chemical data. The limit of detection was estimated to be less than 16 copies of genomic DNA in spiked commercial wheat flour. CONCLUSIONS:The current Fusarium chip proved to be a highly sensitive and fast microarray for detection and identification of Fusarium species. We postulate that the method also has potential for (semi-)quantification. SIGNIFICANCE AND IMPACT OF THE STUDY:The Fusarium chip may prove to be a very valuable tool for screening of cereal samples in the food and feed production chain, and may facilitate detection of new or introduced Fusarium spp.
journal_name
J Appl Microbioljournal_title
Journal of applied microbiologyauthors
Kristensen R,Gauthier G,Berdal KG,Hamels S,Remacle J,Holst-Jensen Adoi
10.1111/j.1365-2672.2006.03165.xsubject
Has Abstractpub_date
2007-04-01 00:00:00pages
1060-70issue
4eissn
1364-5072issn
1365-2672pii
JAM3165journal_volume
102pub_type
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