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.
1990
Forfattere
Camilla BaumannSammendrag
Det er ikke registrert sammendrag
Sammendrag
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Forfattere
Lars StrandSammendrag
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Forfattere
Mekjell MelandSammendrag
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Forfattere
Odd Eilertsen Rune Halvorsen Økland Tonje Økland Oddvar PedersenSammendrag
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Forfattere
Ivar GjerdeSammendrag
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Sammendrag
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Forfattere
Leiv M. Mortensen Oddvar SkreSammendrag
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Forfattere
Leiv M. Mortensen Oddvar SkreSammendrag
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.
Forfattere
Oddvar Skre Leiv M. MortensenSammendrag
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.