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Data underpinning the paper: Intra-species variability in Fusarium langsethiae strains in growth and T-2/HT-2 mycotoxin production in response to climate change abiotic factors.

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posted on 21.06.2021, 07:58 by Carol Verheecke, alejandro lopez-pietro, Esther Garcia Cela, Angel Medina Vaya, Naresh Magan
The objective of this study was to evaluate the potential intra-species variability of 3 Fusarium langsethiae strains in
response to extreme climate change (CC) conditions on an oat-based matrix. The impact of elevated temperature
(25 vs 30-34 °C) coupled with increasing drought stress (0.98 vs 0.95 aw ) and elevated CO2 (400 vs 1000 ppm) were examined on lag phases prior to growth, growth rate, and production of the mycotoxins T-2 and HT-2 and their
ratio. In comparison to the control conditions (25 °C; 0.98; 400 ppm), exposure to increased temperature (30-
34 °C), showed similar reductions in the lag phase and fungal growth rates of all 3 strains. However, with elevated
CO2 a reduction in both lag phases prior to growth and growth rate occurred regardless of the aw examined. For
T-2 and HT-2 mycotoxin production, T-2 showed the most intra-species variability in response to the interacting
abiotic stress factors, with the 3 strains having different environmental conditions for triggering increases in T-2
production: Strain 1 produced higher T-2 toxin at 25 °C, while Strain 2 and the type strain (Fl201059) produced
most at 0.98 aw /30 °C. Only Strain 2 showed a reduction in toxin production when exposed to elevated CO2 . HT-2 production was higher at 25 °C for the type strain and higher at 30-34 °C for the other two strains, regardless of the aw or
CO2 level examined. The HT-2/T-2 ratio showed no significant differences due to the imposed interacting
CC abiotic conditions.


Oats for the future: deciphering the potential of host resistance and RNAi to minimise mycotoxin contamination under present and future climate scenarios

Science Foundation Ireland

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