Molecular diagnostics on the toxigenic potential of Fusarium spp. plant pathogens.

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.

journal_name

J Appl Microbiol

authors

Dawidziuk A,Koczyk G,Popiel D,Kaczmarek J,Buśko M

doi

10.1111/jam.12488

subject

Has Abstract

pub_date

2014-06-01 00:00:00

pages

1607-20

issue

6

eissn

1364-5072

issn

1365-2672

journal_volume

116

pub_type

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