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.
2024
Forfattere
Wendy Marie Waalen Anne Kjersti Uhlen Jon Arne Dieseth Unni Abrahamsen Chloé Grieu Vilde Gadderud Shirin MohammadiSammendrag
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Forfattere
Aline Fugeray-Scarbel Laurent Bouffier Stéphane Lemarié Leopoldo Sánchez Ricardo Alia Chiara Biselli Joukje Buiteveld Andrea Carra Luigi Cattivelli Arnaud Dowkiw Luis Fontes Agostino Fricano Jean-Marc Gion Jacqueline Grima-Pettenati Andreas Helmersson Francisco Lario Luis Leal Sven Mutke Giuseppe Nervo Torgny Persson Laura Rosso Marinus JM Smulders Arne Steffenrem Lorenzo Vietto Matti HaapanenSammendrag
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Sammendrag
Floral initiation in biennial-fruiting red raspberry is controlled by the interaction of temperature and photoperiod. To determine the threshold temperatures for short day (SD) floral initiation in early- and late-flowering cultivars, we exposed plants of ‘Glen Ample’, ‘Glen Mor’ and ‘Duo’ to 12°, 16° and 20°C in a daylight phytotron under naturally decreasing autumn daylength at Ås, Norway (59°40’N). While none of the cultivars ceased growing or initiated floral primordia at 20°C, ‘Glen Ample’ and ‘Glen Mor’ initiated buds at 12° and 16°C, whereas ‘Duo’ formed flower buds at 12°C only. Surprisingly, however, all plants flowered abundantly in spring after winter chilling in the dark at −1.5 ± 0.5°C for 7 months. We discuss two possible explanations for this unusual and novel flowering response. Fractional induction is well known in raspberry, and we visualise that in SD at 20°C, the SD requirement is fulfilled, while floral induction is still blocked by inappropriate temperature. A vernalisation-like response is alternatively suggested as this can take place at near-freezing temperatures in the dark. A combination of the two mechanisms is also possible and likely. We conclude, however, that the two floral induction processes are fundamentally different and controlled by different physiological mechanisms.
Forfattere
Marco Ferretti Arthur Gessler Nathalie Cools Stefan Fleck Rossella Guerrieri Tamara Jakovljević Manuel Nicolas Tiina M. Nieminen Diana Pitar Nenad Potočić Stephan Raspe Marcus Schaub Kai Schwärzel Volkmar Timmermann Monika Vejpustková Lars Vesterdal Petteri Vanninen Peter Waldner Lothar Zimmermann Tanja GM SandersSammendrag
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Forfattere
James Kisaakye Dennis Beesigamukama Solveig Haukeland Sevgan Subramanian Paul K. Thiongo Segenet Kelemu Chrysantus M. TangaSammendrag
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Forfattere
Anders Ræbild Kesara Anamthawat-Jónsson Ulrika Egertsdotter Juha Immanen Anna Monrad Jensen Athina Koutouleas Helle Jakobe Martens Kaisa Nieminen Jill Katharina Olofsson Anna-Catharina Röper Jarkko Salojärvi Martina Strömvik Mohammad Vatanparast Adam Vivian-SmithSammendrag
Polyploidy, or genome doubling, has occurred repeatedly through plant evolution. While polyploid plants are used extensively in agriculture and horticulture, they have so far found limited use in forestry. Here we review the potentials of polyploid trees under climate change, and investigate if there is support for increased use. We find that polyploid trees like other plants have consistent increases in cell sizes compared to diploids, and that leaf-area based rates of photosynthesis tend to increase with increasing levels of ploidy. While no particular trend could be discerned in terms of biomass between trees of different ploidy levels, physiology is affected by polyploidization and several studies point towards a high potential for polyploid trees to adapt to drought stress. The ploidy level of most tree species is unknown, and analysis of geographical patterns in frequencies of polyploid trees are inconclusive. Artificial polyploid trees are often created by colchicine and in a few cases these have been successfully applied in forestry, but the effects of induced polyploidization in many economically important tree species remains untested. Polyploids would also be increasingly useful in tree breeding programs, to create synthetic hybrids or sterile triploids that could control unwanted spreading of germplasm in nature. In conclusion, this review suggests that polyploid trees may be superior under climate change in some cases, but that the potential of polyploids is not yet fully known and should be evaluated on a case-to-case basis for different tree species.
Forfattere
Ilona Knollová Milan Chytrý Helge Bruelheide Stefan Dullinger Jutta Kapfer Franz Essl John-Arvid Grytnes Vigdis VandvikSammendrag
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Forfattere
Anne Rørholt Margrete Steinnes Erik Engelien Gunnhild Søgaard Rune Eriksen Arvid SvenssonSammendrag
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