Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2026
Forfattere
Theresa Weigl Jorunn Børve Melissa Magerøy Hanne Larsen Carl Gunnar Fossdal Siv Fagertun RembergSammendrag
The physiological disorder soft scald may cause losses in apple fruit storage. This study aimed at understanding the interplay between fruit maturity at harvest and storage temperature on soft scald development in the susceptible cultivar ‘Red Aroma’. Fruit harvested late and subsequently stored at −0.5 °C developed the significantly highest soft scald incidence. Overall ethylene and CO2-production was reduced in late harvested fruit stored at −0.5 °C, while fruit from the early harvest showed a cold-induced ethylene increase under the same storage conditions, suggesting an active cold-acclimation response. Clustering of RNA sequencing data and overrepresentation analysis revealed that transcripts involved in cell wall modification, ripening-associated signaling, antioxidant defense system and secondary metabolism were upregulated in late harvested fruit at harvest as well as soft scald-affected fruit after storage. In contrast, early harvested fruit at harvest and disorder-free fruit after storage showed higher expression of transcripts associated with abiotic stress resistance, such as leucine-rich repeat receptor-like kinases, protein kinases with tetratricopeptide repeat domains, and auxin response factor, indicating a potential link between early maturity and enhanced cold tolerance in ‘Red Aroma’ apple fruit.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Heidi Udnes Aamot Magne Nordang Skårn Katherine Ann Gredvig Nielsen Chloé Grieu Guro BrodalSammendrag
Det er ikke registrert sammendrag
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Forfattere
Simeon Rossmann Erik Lysøe Monica Skogen Håvard Eikemo Marta Janiszewska Mirella Ludwiczewska Sylwester Sobkowiak Jadwiga Sliwka May Bente BrurbergSammendrag
Det er ikke registrert sammendrag
Sammendrag
Core rot in apple has only been considered a problem in a limited number of cultivars and has not been a focus in Norway, or in many other countries. There is currently a high demand for apple juice and cider in Norway. As core rot is not detectable on the fruit surface until the rot reaches the outer fruit flesh, it is possible for infected fruit to be used for juice without noticing the rot. Since Fusarium spp., one of the known causes of core rot, is a known producer of mycotoxins, precautionary investigations are needed. Over several seasons it was found that both pre- and postharvest rot of Fusarium spp. were common on most of the cultivars grown in Norway. As in other countries, Fusarium avenaceum has dominated so far, but Fusarium paeoniae was also identified on apple. Inoculation experiments with attached fruit and in storage were successful both in establishing core rot and detecting different mycotoxins from the fruit. There were differences between isolates of F. avenaceum in both the type of mycotoxins produced and the amount. A potential life cycle for Fusarium spp. on apple fruit in Norway is suggested, and possible ways of reducing the incidence both pre- and postharvest are discussed.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Petter Öhrn Mats Berlin Jan-Olov Weslien Malin Elfstrand Paal Krokene Anna Maria Jönsson Audrius MenkisSammendrag
Background and aims Drought weakens tree defenses, predisposing Norway spruce (Picea abies) to spruce bark beetle (Ips typographus) attack. The extreme 2018 summer drought in Sweden triggered an unprecedented bark beetle outbreak. Our objective was to quantify how weather, soil moisture, and tree provenance influence Norway spruce defense capacity to a necrotrophic beetle-associated pathogen. Methods Trees at three sites in Sweden were inoculated with the phytopathogenic fungus Leptographium europhioides on four occasions during each of the 2019 and 2021 growing seasons. At each site, we inoculated spruce provenances of Swedish or East European origin, with early and late spring bud burst, respectively. Tree defense capacity, expressed as the extent of necrotic lesion formation following fungal inoculation, was used as a proxy for resistance to bark beetle attack. Results Spruce defense capacity (i.e. lesion size) differed with water availability (both precipitation and soil moisture conditions) but not with the timing of spring bud burst. There were within-season differences, with trees having less efficient defenses (producing larger lesions) in the early season (June). On intermediate soil moisture sites, lesions were larger in 2019 than in 2021. In both years, there was a significant negative correlation between lesion size and water availability in the autumn of the previous year. Conclusion Spruce defense capacity varied with local environmental conditions but not with provenance phenology. Variations between study years reflected the sensitivity of spruce defenses to climatic variability and the partial recovery of tree resistance 3 years after the 2018 drought.
Sammendrag
Det er ikke registrert sammendrag