Development of Fusarium langsethiae in commercial cereal production

Opoku, Nelson; Back, Matthew A.; Edwards, Simon

doi:10.1007/s10658-012-0151-x

Cited by 26 publications

(34 citation statements)

References 27 publications

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“…Wet/humid and moderate warm conditions prior to flowering were associated with increased HT2 + T2 accumulation in grain, whereas low or higher than normal air temperatures during this same period were associated with reduced HT2 + T2. These results concur with previous studies that indicate that the pre-flowering weather conditions are critical for HT2 + T2 accumulation in oats (Opoku et al 2013). Warm/humid weather after flowering, and cool/humid weather close to harvest increased the risk of elevated HT2 + T2 levels, whilst warm temperatures and no rain during dough development reduced the risk of HT2 + T2 accumulation in oat grains.…”

Section: Discussionsupporting

confidence: 92%

“…The accumulation of HT2 + T2 in F. langsethiae infested oats in the UK has been associated with warm and wet weather conditions before anthesis (Opoku et al 2013). Similar associations were found by Xu et al (2014), with a positive relationship between the HT2 + T2 content in harvested oat grains and warm and wet conditions during early May (before anthesis) and dry conditions thereafter.…”

supporting

confidence: 56%

“…In accordance with our study, Xu et al 2014 also reported that wet conditions pre-flowering were important in predicting the risk of HT2 + T2 in UK oats. Additionally, Opoku et al 2013 observed higher F. langsethiae infection levels, and subsequent mycotoxin production, in seasons with humid weather in the week prior to GS59 (end of heading). Furthermore, Opoku et al 2013 observed a high content of F. langsethiae DNA in oat plants around GS59 that suggested infection by F. langsethiae occurs during head emergence and before flowering.…”

Section: Discussionmentioning

confidence: 89%

“…Additionally, Opoku et al 2013 observed higher F. langsethiae infection levels, and subsequent mycotoxin production, in seasons with humid weather in the week prior to GS59 (end of heading). Furthermore, Opoku et al 2013 observed a high content of F. langsethiae DNA in oat plants around GS59 that suggested infection by F. langsethiae occurs during head emergence and before flowering. Together these studies suggest that weather conditions pre-flowering influence the initial F. langsethiae infection and subsequent mycotoxin production.…”

Section: Discussionmentioning

confidence: 89%

“…Oats are most susceptible to infection by F. graminearum during flowering (Tekle et al 2012). By contrast, infection by F. langsethiae, is assumed to occur prior to flowering (Opoku et al 2013). The weather conditions that influence the accumulation of HT2 + T2 in oats are also reported to differ from those observed to influence DON accumulation (Xu et al 2014).…”

mentioning

confidence: 99%

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HT-2 and T-2 toxins in Norwegian oat grains related to weather conditions at different growth stages

et al. 2018

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High concentrations of the mycotoxins HT-2 and T-2 (HT2 + T2), primarily produced by Fusarium langsethiae, have occasionally been detected in Norwegian oat grains. In this study, we identified weather variables influencing accumulation of HT2 + T2 in Norwegian oat grains. Oat grain samples from farmers' fields were collected together with weather data (2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013). Spearman rank correlation coefficients were calculated between the HT2 + T2 contamination in oats at harvest and a range of weather summarisations within estimated phenological windows of growth stages in oats (tillering, flowering etc.). Furthermore, we developed a mathematical model to predict the risk of HT2 + T2 in oat grains. Our data show that adequate predictions of the risk of HT2 + T2 in oat grains at harvest can be achieved, based upon weather data observed during the growing season. Humid and cool conditions, in addition to moderate temperatures during booting, were associated with increased HT2 + T2 accumulation in harvested oat grains, whereas warm and humid weather during stem elongation and inflorescence emergence, or cool weather and absence of rain during booting reduced the risk of HT2 + T2 accumulation. Warm and humid weather immediately after flowering increased the risk, while moderate to warm temperatures and absence of rain during dough development, reduced the risk of HT2 + T2 accumulation in oat grains. Our data indicated that HT2 + T2 contamination in oats is influenced by weather conditions both pre-and post-flowering. These findings are in contrast with a previous study examining the risk of deoxynivalenol contamination in oat reporting that toxin accumulation was mostly influenced by weather conditions from flowering onwards.

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Section: Discussionsupporting

confidence: 92%

supporting

confidence: 56%

Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 89%

mentioning

confidence: 99%

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HT-2 and T-2 toxins in Norwegian oat grains related to weather conditions at different growth stages

et al. 2018

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Genome‐wide association mapping of Fusarium langsethiae infection and mycotoxin accumulation in oat (Avena sativa L.)

et al. 2020

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Fusarium langsethiae is a symptomless pathogen of oat panicles that produces T-2 and HT-2 mycotoxins, two of the most potent trichothecenes produced by Fusarium fungi in cereals. In the last few years, the levels of these mycotoxin in oat grain has increased and the European commission have already recommended a maximum level for of 1000 μg kg −1 for unprocessed oat for human consumption. The optimal and most sustainable way of combating infection and mycotoxin contamination is by releasing resistant oat varieties. Here the objective was to determine if we could identify any genomic loci associated with either the accumulation of F. langsethiae DNA or mycotoxins in the grain. In each of two years, field trials were conducted wherein 190 spring oat varieties were inoculated with a mixture of three isolate of the pathogen. Mycotoxins were quantified using liquid chromatography-tandem mass spectrometry. Varieties were genotyped using 16,863 genotyping by sequencing markers. Genomewide association studies associated 5 SNPs in the linkage group Mr06 with T-2 + HT-2 mycotoxin accumulation. Markers were highly correlated, and a single QTL was identified. The marker avgbs_6K_95238.1 mapped within genes showing similarity to lipase, lipase-like or lipase precursor mRNA sequences and zinc-finger proteins. These regions have previously been shown to confer a significant increase in resistance to Fusarium species.

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Triticale Biotic Stresses—Known and Novel Foes

Arseniuk

Góral

2015

Triticale

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Development of Fusarium langsethiae in commercial cereal production

Cited by 26 publications

References 27 publications

HT-2 and T-2 toxins in Norwegian oat grains related to weather conditions at different growth stages

HT-2 and T-2 toxins in Norwegian oat grains related to weather conditions at different growth stages

Genome‐wide association mapping of Fusarium langsethiae infection and mycotoxin accumulation in oat (Avena sativa L.)

Triticale Biotic Stresses—Known and Novel Foes

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