Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2015
Abstract
Epigenetic memory formed in the Norway spruce embryos permanently affect the timing of bud burst and bud set in the progenies, vitally important adaptive traits in this long-lived forest species. Epigenetic memory marks are established in response to the temperature conditions prevailing during embryogenesis; the epitype is fixed by the time the embryo is fully developed and is mitotically propagated throughout the tree’s life span. Somatic embryogenesis closely mimics the natural zygotic embryo formation and results in epigenetically different plants in a predictable temperature-dependent manner with respect to altered phenology. Using RNAseq transcriptome analysis of mRNA and noncodingRNA (ncRNA) changes were monitored in somatic embryos under different temperatures. We found distinct differences in mRNA and ncRNA transcriptomes between the genetically identical embryogenic tissues grown under the epitype-inducing temperatures suggesting temperature-dependent canalizing of gene expression during embryo formation, putatively based on chromatin modifications.
Abstract
No abstract has been registered
Authors
Annelene Pengerud Per Stålnacke Marianne Bechmann Gitte Blicher-Mathiesen Arvo Iital Jari Koskiaho Katarina Kyllmar Ainis Lagzdins Arvydas PovilaitisAbstract
No abstract has been registered
Authors
Bruce Talbot Stephan HoffmanAbstract
In this study, the performance of two terrain-going cable yarders was studied and used in a system analysis which included processing then forwarding to roadside, or whole-tree skidding and processing at roadside. The potential application for such systems was evaluated in GIS, and the investment costs in appropriate machinery was compared with the cost of extending the road network for access to conventional yarders.
Authors
Andrea FickeAbstract
No abstract has been registered
Authors
Trygve S. AamlidAbstract
No abstract has been registered
Abstract
Ten exotic Abies species were tested in two field trials, where the aim was to find suitable species and provenances for Christmas tree production in coastal and fjord areas in Norway. The material included 14 provenances of Abies nordmanniana, 3 provenances of Abies bornmuelleriana, 3 provenances of Abies koreana, 2 provenances of Abies amabilis, and 1 provenance each of Abies equi-trojani, Abies alba, Abies procera, Abies homolepis, Abies nephrolepis, and Abies forrestii. Field trials were established at Gulen in Sogn og Fjordane County and at Verdal in Nord-Trøndelag County. Christmas tree classification was done seven and eight growing seasons after establishment. The Christmas tree yield was higher in Gulen (64%) than in Verdal (45%), which is situated further north. Also, the survival and the height growth were higher in Gulen than in Verdal. A more humid climate and a longer growth season in Gulen may explain some of the differences. Of the 10 species, A. nordmanniana, A. homolepis, and A. bornmuelleriana produced the highest Christmas tree yield at Gulen, while A. homolepis and A. koreana had the highest yield at Verdal. Due to early bud burst, A. equi-trojani and A. bornmuelleriana are only suited for Christmas tree growing in the best climatic areas.
Abstract
No abstract has been registered
Authors
Kari-Anne Lyng Ingunn Saur Modahl Hanne Møller John Morken Tormod Briseid Ole Jørgen HanssenAbstract
No abstract has been registered
Authors
M. Bielecka Y. Tuchkovenko J. Lloret A. I. Lillebø J. M. Dias M. Robakiewicz M. Zalewski V. Krysanova B. Chubarenko Per StålnackeAbstract
No abstract has been registered