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Open AccessArticle

Enniatin Production Influences Fusarium avenaceum Virulence on Potato Tubers, but not on Durum Wheat or Peas

1
Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, 5403–1st Avenue South, Lethbridge, AB T1J 4B1, Canada
2
Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Avenue, Central Experimental Farm, Ottawa, ON K1A 0C6, Canada
3
Department of Crop Genetics and Breeding and Applied Biotechnology, Yangzhou University, 12 Wenhui East Road, Yangzhou 225009, China
4
Department of Plant Pathology, Hebei Agricultural University, NO.2596 Lekai South Street, Baoding 071000, China
*
Author to whom correspondence should be addressed.
Current Address: Zhenjiang Institute of Agricultural Science of Hilly Regions, Jurong 212400, China.
Pathogens 2020, 9(2), 75; https://doi.org/10.3390/pathogens9020075
Received: 23 December 2019 / Revised: 13 January 2020 / Accepted: 14 January 2020 / Published: 21 January 2020
(This article belongs to the Special Issue Pathogenesis of Fungal and Bacterial Microbes)
Fusarium avenaceum is a generalist pathogen responsible for diseases in numerous crop species. The fungus produces a series of mycotoxins including the cyclohexadepsipeptide enniatins. Mycotoxins can be pathogenicity and virulence factors in various plant–pathogen interactions, and enniatins have been shown to influence aggressiveness on potato tubers. To determine the role of these mycotoxins in other F. avenaceum–host interactions, ENNIATIN SYNTHASE 1 (ESYN1) disruption and overexpression mutants were generated and their ability to infect wheat and peas investigated. As a preliminary study, the transformants were screened for their ability to cause potato tuber necrosis and, consistent with a previous report, enniatin production increased necrotic lesion size on the tubers. By contrast, when the same mutants were assessed in their ability to cause disease in pea roots or durum wheat spikes, no changes in disease symptoms or virulence were observed. While it is known that, at least in the case of wheat, exogenously applied enniatins can cause tissue necrosis, this group of mycotoxins does not appear to be a key factor on its own in disease development on peas or durum wheat. View Full-Text
Keywords: enniatins; mycotoxins; Fusarium; Fusarium head blight; Fusarium root rot; durum wheat; pea; potato; virulence enniatins; mycotoxins; Fusarium; Fusarium head blight; Fusarium root rot; durum wheat; pea; potato; virulence
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Eranthodi, A.; Schneiderman, D.; Harris, L.J.; Witte, T.E.; Sproule, A.; Hermans, A.; Overy, D.P.; Chatterton, S.; Liu, J.; Li, T.; González-Peña Fundora, D.; Zhao, W.; Foroud, N.A. Enniatin Production Influences Fusarium avenaceum Virulence on Potato Tubers, but not on Durum Wheat or Peas. Pathogens 2020, 9, 75.

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