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
(2009) In Tree Physiology 29(4). p.467-481- Abstract
- 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... (More) - 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. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4936274
- author
- Hall, Marianne LU ; Räntfors, Mats ; Slaney, Michelle ; Linder, Sune and Wallin, Göran
- publishing date
- 2009
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- climate change, NAR, net CO2 assimilation rate, phenology, photosynthesis, Picea abies, shoot development
- in
- Tree Physiology
- volume
- 29
- issue
- 4
- pages
- 467 - 481
- publisher
- Oxford University Press
- external identifiers
-
- scopus:74549189142
- ISSN
- 1758-4469
- DOI
- 10.1093/treephys/tpn047
- language
- English
- LU publication?
- no
- id
- 76b37de6-4a2e-4e6a-990d-f9220b971ac2 (old id 4936274)
- date added to LUP
- 2016-04-04 12:07:10
- date last changed
- 2022-04-12 12:22:01
@article{76b37de6-4a2e-4e6a-990d-f9220b971ac2,
abstract = {{Effects of ambient and elevated temperature<br/><br>
and atmospheric carbon dioxide concentration ([CO2]) on<br/><br>
CO2 assimilation rate and the structural and phenological<br/><br>
development of shoots during their first growing season<br/><br>
were studied in 45-year-old Norway spruce trees (Picea<br/><br>
abies (L.) Karst.) enclosed in whole-tree chambers.<br/><br>
Continuous measurements of net assimilation rate<br/><br>
(NAR) in individual buds and shoots were made from<br/><br>
early bud development to late August in two consecutive<br/><br>
years. The largest effect of elevated temperature (TE) was<br/><br>
manifest early in the season as an earlier start and<br/><br>
completion of shoot length development, and a 1–3-week<br/><br>
earlier shift from negative to positive NAR compared<br/><br>
with the ambient temperature (TA) treatments. The<br/><br>
largest effect of elevated [CO2] (CE) was found later in<br/><br>
the season, with a 30% increase in maximum NAR<br/><br>
compared with trees in the ambient [CO2] treatments<br/><br>
(CA), and shoots assimilating their own mass in terms of<br/><br>
carbon earlier in the CE treatments than in the CA<br/><br>
treatments. Once the net carbon assimilation compensation<br/><br>
point (NACP) had been reached, TE had little or no<br/><br>
effect on the development of NAR performance, whereas<br/><br>
CE had little effect before the NACP. No interactive<br/><br>
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<br/><br>
to canopy assimilation during their first year.}},
author = {{Hall, Marianne and Räntfors, Mats and Slaney, Michelle and Linder, Sune and Wallin, Göran}},
issn = {{1758-4469}},
keywords = {{climate change; NAR; net CO2 assimilation rate; phenology; photosynthesis; Picea abies; shoot development}},
language = {{eng}},
number = {{4}},
pages = {{467--481}},
publisher = {{Oxford University Press}},
series = {{Tree Physiology}},
title = {{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}},
url = {{http://dx.doi.org/10.1093/treephys/tpn047}},
doi = {{10.1093/treephys/tpn047}},
volume = {{29}},
year = {{2009}},
}