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.
2009
Forfattere
Lars Olav Brandsæter Kjell MangerudSammendrag
Det er ikke registrert sammendrag
Forfattere
Lars Olav Brandsæter Kjell MangerudSammendrag
Det er ikke registrert sammendrag
Sammendrag
Populærvitenskapelig framstilling av resultater fra et kartleggingsprosjekt om bruk og vern av utsatte kystområder. Studielokalitet er Froan i Sør-Trøndelag. Resultatene inngår i et større forskningsprosjekt styrt av Norsk senter for bygdeforskning (Coast-Scenes).
Forfattere
Anita SønstebySammendrag
Det er en vanlig oppfatning blant bærdyrkere at relativt lav temperatur er gunstig for rik blomsterdanning hos jordbær og bringebær. I ei tid med klimaendringer, er det derfor mange som spør om hvordan de milde høstene vi har hatt i det siste, påvirker blomstring og avling. Vi har i de seinere åra studert blomstring hos arter og sorter av jordbær og bringebær under kontrollerte klimaforhold, og kan nå langt på vei forklare fysiologiske særtrekk for blomstring hos disse artene, og derigjennom peke på fordeler og begrensninger som dyrking av disse gir oss under våre klimaforhold.
Sammendrag
Det er en vanlig oppfatning blant bærdyrkere at relativt lav høst-temperatur er gunstig for rik blomsterdanning hos jordbær og bringebær. I ei tid med klimaendringer, er det derfor mange som spør om hvordan de milde høstene vi har hatt i det siste, påvirker blomstring og avling. Vi har i de seinere åra studert blomstring hos arter og sorter av jordbær og bringebær under kontrollerte klimaforhold, og kan nå langt på vei forklare fysiologiske særtrekk for blomstringen hos disse artene, og derigjennom peke på fordeler og begrensninger for dyrkingen under endrede temperaturforhold. Hovedkonklusjonen blir, at mens mildere høster vil være en fordel for blomsterdanningen hos våre vanlige jordbærsorter, og for høstbærende bringebær, vil dette virke negativt og føre til seinere blomsterdanning hos to-årige bringebærsorter.
Forfattere
Kristine Marie Olsen Rune Slimestad Unni Synnøve Lea Cato Brede Trond Karsten Løvdal Peter Ruoff Michel Verheul Cathrine LilloSammendrag
The flavonoid pathway is known to be up-regulated by different environmental stress factors. Down-regulation of the pathway is much less studied and is emphasized in the present work. Flavonoid accumulation was induced by exposing plants for 1 week to nitrogen depletion at 10 degrees C, giving high levels of anthocyanins and 3-glucoside-7-rhamnosides, 3,7-di-rhamnosides and 3-rutinoside-7-rhamnosides of kaempferol and quercetin. Flavonol accumulation as influenced by temperatures and nitrogen supply was not related to the glycosylation patterns but to the classification as quercetin and kaempferol. When nitrogen was re-supplied, transcripts for main regulators of the pathway, PAP1/GL3 and PAP2/MYB12, fell to less than 1 and 0.1% of initial values, respectively, during 24 h in the 15-30 degrees C temperature range. Anthocyanins showed a half-life of approximately 1 d, while the degradation of flavonols was much slower. Interestingly, the initial fluxes of anthocyanin and flavonol degradations were found to be temperature-independent. A kinetic model for the flavonoid pathway was constructed. In order to get the observed concentration-temperature profiles as well as the temperature compensation in the flavonoid degradation flux, the model predicts that the flavonoid pathway shows an increased temperature sensitivity at the end of the pathway, where the up-regulation by PAP/GL3 has been found to be largest.
Forfattere
Anita Sønsteby Ola M. HeideSammendrag
The effect of night temperature on short day (SD) floral induction in three June-bearing strawberry cultivars of different geographic origin was studied and compared with yield performance in the cool Nordic environment. At the optimum day temperature of 18°C, the SD flowering response of the cultivars ?Florence? and ?Korona? increased significantly with increasing night temperature from 9 to 18°C, while an optimum was reached at 15°C in ?Frida?, a cultivar selected under coolenvironment conditions in Norway. Also, while saturated flowering response was obtained with three weeks of SD treatment at all temperatures in ?Frida?, several plants of ?Florence? and ?Korona? failed to initiate flowers at 9°C night temperature even with five weeks of SD. The effect of extended SD period was particularly pronounced in ?Florence?. The slow SD floral induction response of ?Florence? was associated with a two-week delay of anthesis in subsequent long day (LD) conditions at 21°C. Performance studies of the same cultivars during two years under field conditions also demonstrated that the yield potential of ?Florence? was not realized under the climatic conditions prevailing at these locations. The yields varied significantly among the cultivars, ?Frida? having the highest yields, followed by ?Korona? and ?Florence? far below. It is concluded that, in the Nordic environment, autumn (September) night temperatures are obviously sub-optimal for yield performance of some June-bearing strawberry cultivars, and that this effect is mediated by autumn temperature effects on flower initiation responses. In the biennial-fruiting raspberry cultivar ?Glen Ample?, flowering and dormancy induction are controlled by the interaction of low temperature and short photoperiods. As neither process takes place at temperatures above 15°C regardless of the photoperiodic conditions, low temperature is of crucial regulatory importance. Environmental control of annual-fruiting cultivars is also briefly discussed.
Forfattere
Daniel P. Rasse Karin Knoth de Zarruk Line Tau StrandSammendrag
Det er ikke registrert sammendrag
Forfattere
Heleen A. de Wit Rasmus Astrup Torill Engen-Skaugen Annika Hofgaard Glen Peters Line Tau StrandSammendrag
Det er ikke registrert sammendrag
Forfattere
Inger MartinussenSammendrag
Wild berries are characteristic part of the Northern nature and a potential speciality of Nordic countries. Wild berries are also a rich and valuable resource that has not yet been exploited in a satisfactory level. Approximately 90-95 per cent of the whole wild berry crop yield is left unpicked in the Nordic forests every year. The challenges of the wild berry utilization are similar in Nordic countries - the logistics of berry picking including traceability, fragmented sector structure as well as the high share of unprocessed raw material in export. The Nordic project focusing on bilberry (Vaccinium myrtillus) "Bilberry: Towards functional food markets" (2007-2009) is a part of the New Nordic Food programme funded by the Nordic Innovation Centre. The programme aims to enhance cooperation and innovation among companies that utilize the natural resources in the Nordic countries. The aim of the project is to improve wild berry production and utilization in the Nordic and global market. To achieve this goal a network between the Nordic experts presenting the different fields of the wild berry sector has been established. The project has focused on marketing research, quality issues, biodiversity and traceability of wild berries, especially bilberry. The results of the marketing survey were published in November 2008. The aim of the survey was to generate an overall picture of the companies working with wild berries in Nordic countries and gather information on the existence and willingness of the berry companies to cooperate for instance in wild berry supply, logistics, marketing or research and development