Search for the source of contamination Type A trichothecenes in oats. An approximation metagenómica
Jessica Gil Serna 1, Belén Patiño Álvarez 1, Covadonga Vázquez Estévez 1,
Angel Medina 2.
(1) Complutense University of Madrid, Genetics, Physiology and Microbiology, CC Biológicas, Jose Antonio
Novais 12, Madrid, Spain.
(2) Cranfield University, Environment and AgriFood, Applied Mycology Group, MK43 0AL, Cranfield, United
Kingdom.
jgilsern@ucm.es
T-2 and HT-2 toxins are type A trichothecenes frequently detected in cereals
of small grain in the United Kingdom where they are produced mainly by
Fusarium langsethiae. In recent years, the levels of these mycotoxins in Spain
have increased significantly although it has not been possible to recognize what is the
species responsible for its production. In an attempt to clarify this issue, in this
In this work, NGS sequencing has been carried out on 12 oat samples collected in
Spain and 8 in the United Kingdom to learn about the fungal diversity present.
The results obtained demonstrate the presence of Fusarium species
potentially producing T-2 and HT-2 toxins in both locations. The
species of the Fusarium tricinctum complex were detected in most of the
oat samples collected in Spain. Different works have described the capacity
to synthesize type A trichothecenes in strains of these species for what could be their
source in Spanish cereals. In addition, it has been shown for the first time
presence of F. langsethiae in southern Europe in three samples of oats, suggesting
the displacement of this species from northern Europe probably due to
environmental variations produced in the context of climate change.
On the other hand, the samples of oats from the United Kingdom also presented species
of the F. tricinctum complex as well as F. langsethiae although at much higher levels
than in Spain so the risk that they are contaminated by type A trichothecenes
it is very high.
This work has been financed by the CAM-UCM agreement, project PR65/19-22428.
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