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.

Filter

1993

– Photosynthesis and respiration in leaves of mountain birch (Betula pubescens) and related tree species

Oddvar Skre

Meddelelser fra Skogforsk, 45(6) 1993. 23 s.

Authors

Oddvar Skre

Abstract

The measurements were carried out on excised leaf discs and intactplants by infrared gas analyser technique. The sample plants had been grown for six weeks in varying temperature, light and daylengths. The photorespiration was estimated from measurements at low oxygen level. A strong temperature acclimation effect was found on CO2 exchange rates. Long term low-temperature treatment caused a reduction in photosynthesis and its temperature optimum in all birch populations. Strong acclimation effects of light were also found. Short term (48 hours) low-temperature treatment reduced photosynthesis rates at low light levels. Mountain birch from northern or arctic populations showed relatively high net photosynthetic rates compared with southern populations.

– Pathogenicity of the blue-stain fungi Leptographium wingfieldii and Ophiostoma minus to Scots pine: effect of tree pruning and inoculum density

Halvor Solheim, Bo Långström, Claes Hellqvist

Canadian Journal of Forest Research, 23 1993. 1438-1443

Authors

Halvor Solheim Bo Långström Claes Hellqvist

Abstract

The pathogenicity of the blue-stain fungi Leptographium wingfieldii Morelet and Ophiostoma minus (Hedgc.) H. et P. Syd. associated with the pine shoot beetle Tomicus piniperda (L.), was determined on pruned and unpruned Seots pine (Pinus sylvestris L.) trees. Both fungi killed unpruned trees when inoculated in a 60 cm wide band at a density of 800 inoculations/m2, while severely pruned trees were killed by an inoculation density of 400 inoculations/m2. Trees inoculated with L. wingfieldii died sooner after inoculation than trees inoculated with O. minus.

– Variation and inheritance in diallel crosses with Norway spruce

Tore Skrøppa

In: Proceedings of the IUFRO S2.02-11 Symposium, p. 240. Latvia, 1993. 240

Authors

Tore Skrøppa

Abstract

No abstract has been registered

Conference lecture – Genetic variation and inheritance in diallel crosses within natural populations in Norway spruce

Tore Skrøppa

Gjesteforelesning, 1993

Authors

Tore Skrøppa

Abstract

No abstract has been registered

Conference lecture – Evidence for fast adaptation in Norway spruce

Tore Skrøppa

Gjesteforelesning, 1993

Authors

Tore Skrøppa

Abstract

No abstract has been registered

Conference lecture – Influences of the female flowering environment on adaptive traits of Picea abies

Tore Skrøppa

Gjesteforelsning, 1993

Authors

Tore Skrøppa

Abstract

No abstract has been registered

Conference lecture – The female flowering environment influences adaptive traits in Norway spruce

Tore Skrøppa

Gjesteforelesning, 1993

Authors

Tore Skrøppa

Abstract

No abstract has been registered

Conference lecture – After-effects of the female flowering environment on adaptive traits in Norway spruce

Tore Skrøppa

Gjesteforelesning, 1993

Authors

Tore Skrøppa

Abstract

No abstract has been registered

Conference lecture – Variation and inheritance in diallel crosses within natural populations of Picea abies

Tore Skrøppa

Gjesteforelesning, 1993

Authors

Tore Skrøppa

Abstract

No abstract has been registered

Conference lecture – Evidence for fast adaptation in Picea abies

Tore Skrøppa

Gjesteforelesning, 1993

Authors

Tore Skrøppa

Abstract

No abstract has been registered

Address	Postboks 115 NO-1431 Ås
Phone	+47 406 04 100
E-mail	post@nibio.no