Abstract
Measurements of stem respiration were conducted for a period of four years (1999–2002) in 14-year old Norway spruce (Picea abies [L.] Karst) trees exposed to ambient (CA) and elevated CO2 concentration (CE; ambient plus 350 μmol mol−1). Stem respiration measurements of six trees per treatment were carried out 2–3 times per month during the growing season. Stem respiration in CE treatment was higher (up to 16 %) than in CA treatment. Temperature response of stem respiration (Q10) for the whole experimental period ranged between 1.65–2.57 in CA treatment and 2.24–2.56 in CE treatment. The mean stem respiration rate normalized to 10 °C (R10) in CA and CE treatments ranged between 1.67–1.95 and 2.19–2.72 μmol(CO2) m−2 s−1, respectively. Seasonal variations in stem respiration were related to temperature and tree growth.
Abbreviations
- CA:
-
ambient CO2 concentration
- CE:
-
elevated CO2 concentration
- Q10 :
-
increase in respiration rate per 10 °C
- R10 :
-
normalized respiration rate to a temperature of 10 °C
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This work was supported by the research intention AV0Z60870520 (Academy of Sciences of the Czech Republic) and the grants SP/2d1/93/07 and IAA600870701.
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Acosta, M., Pokorný, R., Janouš, D. et al. Stem respiration of Norway spruce trees under elevated CO2 concentration. Biol Plant 54, 773–776 (2010). https://doi.org/10.1007/s10535-010-0140-x
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DOI: https://doi.org/10.1007/s10535-010-0140-x