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.
1990
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Camilla BaumannAbstract
No abstract has been registered
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Lars StrandAbstract
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Odd Eilertsen Rune Halvorsen Økland Tonje Økland Oddvar PedersenAbstract
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Ivar GjerdeAbstract
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Leiv M. Mortensen Oddvar SkreAbstract
Seedlings of Betula Pubescens, B. verrucosa and Alnus Incana were grown for 50 days in growth chambers at four ozone concentrations for 7 hr per day. Shoot and root dry weight decreased almost linearly with increasing ozone concentration in the three species. Shoot/root and leaf/stem dry weight werealmost unaffected by the treatment, while leaf senescence was significantly enhanced. Visible injury was observed at 53 nl per l and above.
Authors
Oddvar Skre Leiv M. MortensenAbstract
3-year old Norway spruce seedlings from two clonal families were exposed to 10 hours per day with varying concentrations of ozone during the two months shoot elongation period. The plants were then placed in a cold climate chamber with 12 hours photoperiod and tested for frost resistace during the period of dormancy induction.There was a non-linear response on ozone, i.e. the highest sensitivity in one of the families was found at low (40 ppm) concentration. The other family showed no ozone response on frost hardiness.At low ozone concentrations there was a significant increase in shoot growth, relative to control plants, but at 80 and 160 ppm there was significant reduction in all growth parameters.Chloroplast damage and reduced chlorophyll content was found at the highest concentration. The carbohydrate amounts (mg/plant) decreased with increasing ozone concentrations, indicating reduced photosynthesis rates and/or increased respiration rates. There was also reduced formation of new roots already at 40 ppm ozone.
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Bjørn Olav Rosseland Toril Drabløs Eldhuset M. StaurnesAbstract
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Dan AamlidAbstract
No abstract has been registered