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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.

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1999

Academic – Light quality influences germination, root growth and hypocotyle elongation in somatic embryos but not in seedlings of Norway spruce

Harald Kvaalen, M. Appelgren

In Vitro Cellular & Developmental Biology - Plant , 35 1999. 437-441

Authors

Harald Kvaalen M. Appelgren

Abstract

We studied how light from different light sources influences germination and postgerninative growth of plants from somatic embryos and seeds of Norway spruce (Picea abies [L.] Karst).Somatic embryos of three spruce genotypes and seeds were subjected to light from commercially available light sources: Philips TLD Blue 18W/18 (BL), Osram Fluora (FL), Philips Cool White TL 50W/33 (CW), Osram Warm White 18W/30 (WW), Philips Yellow 36W/16 (YE) and Philips TLD Red 36W/15 (RE), 18 h a day, with a photon flux (PAR) at 30 mu mol m(-2) s(-1). After 6 weeks the germination frequencies of the somatic embryo-derived plantlets were 50% under BL and 98% under RE. The corresponding mean root lengths were 6.7 and 15.4 mm. In somatic embryo-derived plantlets cultured under BL, FL, CW and WW, both roots and hypocotyls turned brown, presumably due to production of phenolic substances. Browning was less severe in somatic embryo-derived plantlets cultured under RE and YE. Under RE, the epicotyl elongated in 37% of the plantlets after 6 weeks, compared with 70% under the other light sources. Seed germination and postgerminative seedling growth was modestly influenced by light from these light sources. RE and WW initially delayed germination as compared with BL, FL and CW, but after 2 weeks, more than 90% of the seeds had germinated under all light sources. In conclusion, germination and postgerminative growth of somatic embryos of spruce is sensitive to differences in light quality, whereas seed germination and seedling growth is not.

Lecture – Selective harvesting in uneven-aged spruce forests - damage to advance regeneration and need for supplementary treatments

Oddvar Haveraaen, Dag Fjeld, Aksel Granhus

IUFRO Interdisciplinary Uneven-aged Management Symposium, 15-19 September 1997, Corvallis, Oregon, USA, 1999. 274-287

Authors

Oddvar Haveraaen Dag Fjeld Aksel Granhus

Abstract

No abstract has been registered

1998

Lecture – Economics and environment in the forestry of NW Russia - some r & d challenges and approaches

Dag Fjeld

In: Bemman, A. & Schmidt (eds.): Ecological and economic problems in the boreal woodlands of Russia, pp. 8-10. Proceedings from an international workshop. Dresden Technical University, 1998.

Authors

Dag Fjeld

Abstract

No abstract has been registered

Lecture – Influence of light quality on growth of embryogenic tissue and somatic embryo maturation of Norway spruce

M.J. Latkowska, Harald Kvaalen, M. Appelgren

In: Production (?) of Ornamental Plants, pp: 103-110. Inst. of Pomology and Floriculture, Skierniewice, IPPS. Skierniewice, Poland, 18-19.06.1998, 1998.

Authors

M.J. Latkowska Harald Kvaalen M. Appelgren

Abstract

No abstract has been registered

Lecture – Influence of light quality on somatic embryo maturation of three genotypes of Norway spruce

M.J. Latkowska, Harald Kvaalen, M. Appelgren

In: Abstracts of the 5th Annual Meeting of the Working Group 2, COST 822, p. 37-41. Erfurt 10-13.09.1998, 1998.

Authors

M.J. Latkowska Harald Kvaalen M. Appelgren

Abstract

No abstract has been registered

Lecture – Regeneration - the critical factor for mimicking natural forest dynamics

Oddvar Haveraaen, Dag Fjeld, Aksel Granhus

SkogForsk Report, 1/1998 1998. 94

Authors

Oddvar Haveraaen Dag Fjeld Aksel Granhus

Abstract

No abstract has been registered

Lecture – Silvicultural flexibility in small-scale forestry - a competitive advantage in tomorrow\"s market for environmental services?

Dag Fjeld

In: Hyttinnen, P. & P. Mitchell-Banks (eds.): Proceedings from an International Symposium on Integrating environmental values into small-scale forestry. IUFRO 3.08.00 Small Scale Forestry. Vancouver 16-20 August 1998. EFI proceedings (in press), 1998.

Authors

Dag Fjeld

Abstract

No abstract has been registered

1997

Academic – A comparison of motor-manual cleaning methods on the Norwegian west coast

Dag Fjeld, K.B. Hagen

Journal of Forest Engineering, 8(2) 1997. 37-46

Authors

Dag Fjeld K.B. Hagen

Abstract

No abstract has been registered

Report – COST Action E3 - Forestry in the context of rural development. Proceedings from the 7th meeting, June 8-10 1997 in Bergen

Dag Fjeld

Aktuelt fra Skogforsk, 9/97 1997. 33 s.

Authors

Dag Fjeld

Abstract

No abstract has been registered

Lecture – Logging contractor viability in western Norway

Dag Fjeld

Aktuelt fra Skogforsk, 9/97 1997. 25-26

Authors

Dag Fjeld

Abstract

No abstract has been registered

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