Carbon dioxide exchange of buds and developing shoots of boreal Norway spruce exposed to elevated or ambient CO2 concentration and temperature in whole-tree chambers

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MARC

Hall, Marianne,1976Gothenburg University,Göteborgs universitet,Institutionen för växt- och miljövetenskaper,Department of Plant and Environmental Sciences (author)

Carbon dioxide exchange of buds and developing shoots of boreal Norway spruce exposed to elevated or ambient CO2 concentration and temperature in whole-tree chambers

Article/chapterEnglish2009

Publisher, publication year, extent ...

2009-02-04
Oxford University Press (OUP),2009

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LIBRIS-ID:oai:gup.ub.gu.se/94316
https://gup.ub.gu.se/publication/94316URI
https://doi.org/10.1093/treephys/tpn047DOI
https://res.slu.se/id/publ/49961URI

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Language:English

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Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

Notes

Effects of ambient and elevated temperature and atmospheric carbon dioxide concentration ([CO2]) on CO2 assimilation rate and the structural and phenological development of shoots during their first growing season were studied in 45-year-old Norway spruce trees (Picea abies (L.) Karst.) enclosed in whole-tree chambers. Continuous measurements of net assimilation rate (NAR) in individual buds and shoots were made from early bud development to late August in two consecutive years. The largest effect of elevated temperature (TE) was manifest early in the season as an earlier start and completion of shoot length development, and a 1–3-week earlier shift from negative to positive NAR compared with the ambient temperature (TA) treatments. The largest effect of elevated [CO2] (CE) was found later in the season, with a 30% increase in maximum NAR compared with trees in the ambient [CO2] treatments (CA), and shoots assimilating their own mass in terms of carbon earlier in the CE treatments than in the CA treatments. Once the net carbon assimilation compensation point (NACP) had been reached, TE had little or no effect on the development of NAR performance, whereas CE had little effect before the NACP. No interactive effects of TE and CE on NAR were found. We conclude that in a climate predicted for northern Sweden in 2100, current-year shoots of P. abies will assimilate their own mass in terms of carbon 20–30 days earlier compared with the current climate, and thereby significantly contribute to canopy assimilation during their first year.

Subject headings and genre

NATURVETENSKAP Biologi Ekologi hsv//swe
NATURAL SCIENCES Biological Sciences Ecology hsv//eng
NATURVETENSKAP Biologi Botanik hsv//swe
NATURAL SCIENCES Biological Sciences Botany hsv//eng
LANTBRUKSVETENSKAPER Lantbruksvetenskap, skogsbruk och fiske Skogsvetenskap hsv//swe
AGRICULTURAL SCIENCES Agriculture, Forestry and Fisheries Forest Science hsv//eng
LANTBRUKSVETENSKAPER Annan lantbruksvetenskap Förnyelsebar bioenergi hsv//swe
AGRICULTURAL SCIENCES Other Agricultural Sciences Renewable Bioenergy Research hsv//eng
climate change
NAR
net CO2 assimilation rate
phenology
photosynthesis
Picea abies
shoot development

Added entries (persons, corporate bodies, meetings, titles ...)

Räntfors, Mats,1954Gothenburg University,Göteborgs universitet,Institutionen för växt- och miljövetenskaper,Department of Plant and Environmental Sciences(Swepub:gu)xrantm (author)
Slaney, MichelleSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för sydsvensk skogsvetenskap,Southern Swedish Forest Research Centre(Swepub:slu)52048 (author)
Linder, SuneSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för sydsvensk skogsvetenskap,Southern Swedish Forest Research Centre(Swepub:slu)49789 (author)
Wallin, Göran,1955Gothenburg University,Göteborgs universitet,Institutionen för växt- och miljövetenskaper,Department of Plant and Environmental Sciences(Swepub:gu)xwallg (author)
Göteborgs universitetInstitutionen för växt- och miljövetenskaper (creator_code:org_t)
Sveriges lantbruksuniversitet

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In:Tree Physiology: Oxford University Press (OUP)29:40829-318X1758-4469

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NATURAL SCIENCES: NATURAL SCIENCES; and Biological Scien ...; and Ecology

NATURAL SCIENCES: NATURAL SCIENCES; and Biological Scien ...; and Botany

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