Dawidziuk A, Koczyk G, Popiel D, Kaczmarek J, Buśko M. Molecular diagnostics on the toxigenic potential of Fusarium spp. plant pathogens.
J Appl Microbiol 2014;
116:1607-20. [PMID:
24575830 PMCID:
PMC4237539 DOI:
10.1111/jam.12488]
[Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Revised: 02/05/2014] [Accepted: 02/24/2014] [Indexed: 02/05/2023]
Abstract
AIMS
We propose and test an efficient and rapid protocol for the detection of toxigenic Fusarium isolates producing three main types of Fusarium-associated mycotoxins (fumonisins, trichothecenes and zearelanone).
METHODS AND RESULTS
The novel approach utilizes partially multiplexed markers based on genes essential for mycotoxin biosynthesis (fumonisin--fum6, fum8; trichothecenes--tri5, tri6; zearalenone, zea2) in Fusarium spp. The protocol has been verified by screening a collection of 96 isolates representing diverse species of filamentous fungi. Each Fusarium isolate was taxonomically identified through both molecular and morphological techniques. The results demonstrate a reliable detection of toxigenic potential for trichothecenes (sensitivity 100%, specificity 95%), zearalenone (sensitivity 100%, specificity 100%) and fumonisins (sensitivity 94%, specificity 88%). Both presence and identity of toxin biosynthetic genes were further confirmed by direct sequencing of amplification products.
CONCLUSIONS
The cross-species-specific PCR markers for key biosynthetic genes provide a sensitive detection of toxigenic fungal isolates, contaminating biological material derived from agricultural fields.
SIGNIFICANCE AND IMPACT OF THE STUDY
The conducted study shows that a PCR-based assay of biosynthetic genes is a reliable, cost-effective, early warning system against Fusarium contamination. Its future use as a high-throughput detection strategy complementing chemical assays enables effective targeted application of crop protection products.
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