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Contrasting roles of deoxynivalenol and nivalenol in host-mediated interactions between Fusarium graminearum and Sitobion avenae

Drakulic, Jassy; Kahar, Mohd Haziq; Ajigboye, Olubukola; Bruce, Toby; Ray, Rumiana V.

Authors

Jassy Drakulic jassydrak@gmail.com

Mohd Haziq Kahar

Olubukola Ajigboye

Toby Bruce



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.

Journal Article Type Article
Publication Date Nov 30, 2016
Journal Toxins
Electronic ISSN 2072-6651
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 8
Issue 12
APA6 Citation Drakulic, J., Kahar, M. H., Ajigboye, O., Bruce, T., & Ray, R. V. (2016). Contrasting roles of deoxynivalenol and nivalenol in host-mediated interactions between Fusarium graminearum and Sitobion avenae. Toxins, 8(12), https://doi.org/10.3390/toxins8120353
DOI https://doi.org/10.3390/toxins8120353
Keywords Deoxynivalenol; Nivalenol; Trichothecenes; Fusarium head blight; Aphids; Volatiles
Publisher URL http://dx.doi.org/10.3390/toxins8120353
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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