Publications by authors named "Heidi U Aamot"
Article Synopsis
- High levels of mycotoxins, particularly HT-2 and T-2 toxins, have been frequently found in oat grain in Norway, prompting a study on how tillage operations affect their presence.
- Tillage trials in southeast Norway showed that grain from ploughed plots contained lower levels of these mycotoxins compared to harrowed plots, indicating that more intensive tillage can reduce contamination risks.
- While no significant effect of tillage was observed on DNA concentration in harvested grain, considerable amounts of both DNA and mycotoxins were still detected, suggesting different survival and dispersal characteristics among the involved organisms.
Article Synopsis
- The Norwegian cereal industry faces challenges from head blight (FHB) pathogens, which produce mycotoxins like deoxynivalenol (DON) and T-2 toxins (T2 and HT2) in oats.
- This study aimed to evaluate Nordic spring oat varieties based on their mycotoxin content and the DNA of the fungal species producing them, highlighting the significant impact of FHB resistance on mycotoxin levels in grains.
- Findings showed that oat varieties resistant to FHB had lower mycotoxin levels, emphasizing the need for separate testing for different mycotoxins to effectively screen for FHB resistance in oat breeding.
Article Synopsis
- Norwegian oats are significantly affected by deoxynivalenol (DON), with weather conditions around flowering influencing DON levels.
- A mathematical model was created to predict growth stages of spring oats, allowing researchers to analyze weather data linked to DON content.
- The study found that warmer weather during sowing and cooler, more humid conditions leading up to flowering contribute to higher DON levels in oat grains.
The bread-making quality of wheat depends on the viscoelastic properties of the dough in which gluten proteins play an important role. The quality of gluten proteins is influenced by the genetics of the different wheat varieties and environmental factors. Occasionally, a near complete loss of gluten strength, measured as the maximum resistance towards stretching (R), is observed in grain lots of Norwegian wheat.
View Article and Find Full Text PDFCereal grain contaminated by mycotoxins is undesirable in food and feed because of the harmful health effects of the mycotoxins in humans and animals. Reduction of mycotoxin content in grain by cleaning and size sorting has mainly been studied in wheat. We investigated whether the removal of small kernels by size sorting could be a method to reduce the content of mycotoxins in oat grain.
View Article and Find Full Text PDFWe present the complete genome sequence of type strain LJ96T, a yellow-pigmented gammaproteobacterium isolated from the rhizosphere of barley () Johansen et al. (2005) , a species with numerous potential applications. The genome sequence was deposited to NCBI GenBank with the accession number CP017480.
View Article and Find Full Text PDFThe increased occurrence of Fusarium-mycotoxins in Norwegian cereals over the last decade, is thought to be caused by increased inoculum resulting from more cereal residues at the soil surface as a result of reduced tillage practices. In addition, weather conditions have increasingly promoted inoculum development and infection by Fusarium species. The objective of this work was to elucidate the influence of different tillage regimes (autumn plowing; autumn harrowing; spring plowing; spring harrowing) on the inoculum potential (IP) and dispersal of Fusarium spp.
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