Acclimatisation of Fusarium langsethiae, F. poae and F. sporotrichioides to elevated CO2: impact on fungal growth and mycotoxin production on oat-based media

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dc.contributor.authorKahla, Amal
dc.contributor.authorVerheecke-Vaessen, Carol
dc.contributor.authorDelpino-Deelias, Mariluz
dc.contributor.authorGutierrez-Pozo, Maria
dc.contributor.authorMedina, Angel
dc.contributor.authorMagan, Naresh
dc.contributor.authorDoohan, Fiona
dc.date.accessioned2023-04-05T08:56:14Z
dc.date.available2023-04-05T08:56:14Z
dc.date.issued2023-03-28
dc.description.abstractOats are highly susceptible to infection by Fusarium species, especially F. langsethiae, F. poae and F. sporotrichioides which contaminate the grain with mycotoxins. Climate change is expected to affect fungal colonisation and associated mycotoxin production. The objective of this study was to examine the effect of acclimatisation to elevated CO2 on the growth and mycotoxin production capacity of these fungal species. Strains of F. langsethiae (FL; seven strains), F. poae (FP; two strains) and F. sporotrichioides (FS; one strain) were acclimatised by sub-culturing for 10 generations at either 400 or 1000 ppm CO2 under diurnal temperature conditions. At each sub-culturing, the effect of acclimatisation to elevated CO2 on (a) lag phase prior to growth, (b) growth rate on oat-based media was assessed. Additionally, the production of type A trichothecenes and related toxic secondary metabolites of sub-cultures after 1, 7 and 10 generations were assessed using LC-MS/MS qTRAP. The results showed that Fusarium strains had an increased lag time and growth rate in response to the combined effect of sub-culturing and elevated CO2 levels. T-2 + HT-2 production was affected by elevated CO2 in strain FL4 (7.1-fold increase) and a decrease in strain FL1 (2.0-fold decrease) at the first sub-culturing and FS (1.3-fold decrease) after 7 sub-cultures compared to ambient conditions. The effect of sub-culturing on T-2 + HT-2 production varied depending on the fungal strain. For strain FL4, significantly less T-2 + HT-2 toxins were produced after 10 generations (4.4-fold decrease) as compared to that under elevated CO2 conditions after one sub-culture, and no change was observed under ambient conditions. The FS strain showed significant stimulation of T-2 + HT-2 toxin production after 10 sub-cultured generations (1.1-fold increase) compared to the initial sub-culture of this strain under elevated CO2 conditions. The production of other toxic secondary metabolites was generally not impacted by elevated CO2 conditions or by sub-culture for 10 generations, with the exceptions of FL1 and FP1. FL1 produced significantly more neosolaniol after 10 generations, when compared to those after 1 and 7, regardless of the CO2 conditions. For FP1, elevated CO2 significantly triggered beauvericin production after an initial sub-culture when compared to ambient conditions at the same sub-culture stage (29-fold). FP1 acclimatisation to elevated CO2 led to a decrease of beauvericin production after 10 generations when compared to 1 (6-fold). In contrast, sub-culturing for 10 generations compared to 1 under ambient CO2 conditions resulted in an increase in this toxin (12-fold).en_UK
dc.description.sponsorshipBiotechnology and Biological Sciences Research Council (BBSRC): BB/P001432/1en_UK
dc.identifier.citationKahla A, Verheecke-Vaessen C, Delpino-Deelias M, et al., (2023) Acclimatisation of Fusarium langsethiae, F. poae and F. sporotrichioides to elevated CO2: impact on fungal growth and mycotoxin production on oat-based media, International Journal of Food Microbiology, Volume 394, June 2023, Article number 110176en_UK
dc.identifier.eissn1879-3460
dc.identifier.issn0168-1605
dc.identifier.urihttps://doi.org/10.1016/j.ijfoodmicro.2023.110176
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/19405
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectFusarium spp.en_UK
dc.subjectClimate changeen_UK
dc.subjectTrichothecenesen_UK
dc.subjectToxic secondary metabolitesen_UK
dc.subjectT-2 + HT-2en_UK
dc.titleAcclimatisation of Fusarium langsethiae, F. poae and F. sporotrichioides to elevated CO2: impact on fungal growth and mycotoxin production on oat-based mediaen_UK
dc.typeArticleen_UK

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