Contrasting Roles of Deoxynivalenol and Nivalenol in Host-Mediated Interactions between Fusarium graminearum and Sitobion avenae

A - Papers appearing in refereed journals

Drakulic, J., Kahar, M. H., Ajigboye, O., Bruce, T. J. A. and Ray, R. V. 2016. Contrasting Roles of Deoxynivalenol and Nivalenol in Host-Mediated Interactions between Fusarium graminearum and Sitobion avenae. Toxins. 8 (12), p. 353.

AuthorsDrakulic, J., Kahar, M. H., Ajigboye, O., Bruce, T. J. A. and Ray, R. V.
Abstract

Fusarium graminearum is the predominant causal species of Fusarium head blight in Europe and North America. Different chemotypes of the species exist, each producing a plethora of mycotoxins. Isolates of differing chemotypes produce nivalenol (NIV) and deoxynivalenol (DON), which differ in toxicity to mammals and plants. However, the effect of each mycotoxin on volatile emissions of plant hosts is not known. Host volatiles are interpreted by insect herbivores such as Sitobion avenae, the English grain aphid, during host selection. Previous work has shown that grain aphids are repelled by wheat infected with DON-producing F. graminearum, and this study seeks to determine the influence of pathogen mycotoxins to host volatile chemistry. Volatile collections from infected hosts and olfactometer bioassays with alate aphids were performed. Infections with isolates that produced DON and NIV were compared, as well as a trichothecene deficient transformant derived from the NIV-producing isolate. This work confirmed the repellent nature of infected hosts with DON accumulation. NIV accumulation produced volatiles that were attractive to aphids. Attraction did not occur when NIV was absent and was, therefore, a direct consequence of NIV production.

Keywordsdeoxynivalenol; nivalenol; trichothecenes; Fusarium head blight; aphids; volatiles
Year of Publication2016
JournalToxins
Journal citation8 (12), p. 353
Digital Object Identifier (DOI)doi:10.3390/toxins8120353
Open accessPublished as ‘gold’ (paid) open access
FunderLawes Agricultural Trust
Funder project or codeSustainability
Lawes Trust Studentship: Role of host volatiles in plant disease epidermiology with insect vectors
Publisher's version
Copyright license
CC BY
Output statusPublished
Publication dates
Online30 Nov 2016
Publication process dates
Accepted18 Nov 2016
PublisherMDPI
Copyright licenseCC BY
ISSN2072-6651

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