Spring photosynthetic recovery of boreal Norway spruce under conditions of elevated [CO 2 ] and air temperature
Accumulated carbon uptake, apparent quantum yield (AQY) and light-saturated net CO 2 assimilation (A sat ) were used to assess the responses of photosynthesis to environmental conditions during spring for three consecutive years. Whole-tree chambers were used to expose 40-year-old field-grown Norway...
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Language: | English |
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Oxford University Press
2013
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Online Access: | https://doi.org/10.1093/treephys/tpt066 http://www.ncbi.nlm.nih.gov/pubmed/24169104 http://ecite.utas.edu.au/89630 |
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ftunivtasecite:oai:ecite.utas.edu.au:89630 2023-05-15T17:45:13+02:00 Spring photosynthetic recovery of boreal Norway spruce under conditions of elevated [CO 2 ] and air temperature Wallin, G Hall, M Slaney, M Rantfors, M Medhurst, J Linder, S 2013 https://doi.org/10.1093/treephys/tpt066 http://www.ncbi.nlm.nih.gov/pubmed/24169104 http://ecite.utas.edu.au/89630 en eng Oxford University Press http://dx.doi.org/10.1093/treephys/tpt066 Wallin, G and Hall, M and Slaney, M and Rantfors, M and Medhurst, J and Linder, S, Spring photosynthetic recovery of boreal Norway spruce under conditions of elevated [CO 2 ] and air temperature, Tree Physiology, 33, (11) pp. 1177-1191. ISSN 0829-318X (2013) [Refereed Article] http://www.ncbi.nlm.nih.gov/pubmed/24169104 http://ecite.utas.edu.au/89630 Biological Sciences Ecology Ecological Physiology Refereed Article PeerReviewed 2013 ftunivtasecite https://doi.org/10.1093/treephys/tpt066 2019-12-13T21:53:10Z Accumulated carbon uptake, apparent quantum yield (AQY) and light-saturated net CO 2 assimilation (A sat ) were used to assess the responses of photosynthesis to environmental conditions during spring for three consecutive years. Whole-tree chambers were used to expose 40-year-old field-grown Norway spruce trees in northern Sweden to an elevated atmospheric CO 2 concentration, [CO 2 ], of 700 mol CO 2 mol -1 (C E ) and an air temperature ( T ) between 2.8 and 5.6C above ambient T (T E ), during summer and winter. Net shoot CO 2 exchange (A net ) was measured continuously on 1-year-old shoots and was used to calculate the accumulated carbon uptake and daily A sat and AQY. The accumulated carbon uptake, from 1 March to 30 June, was stimulated by 33, 44 and 61% when trees were exposed to C E , T E , and C E and T E combined, respectively. Air temperature strongly influenced the timing and extent of photosynthetic recovery expressed as AQY and A sat during the spring. Under elevated T (T E ), the recovery of AQY and A sat commenced ㅂ days earlier and the activity of these parameters was significantly higher throughout the recovery period. In the absence of frost events, the photosynthetic recovery period was less than a week. However, frost events during spring slowed recovery so that full recovery could take up to 60 days to complete. Elevated [CO 2 ] stimulated AQY and A sat on average by ㅂ and ㅪ%, respectively, throughout the recovery period, but had minimal or no effect on the onset and length of the photosynthetic recovery period during the spring. However, AQY, A sat and A net all recovered at significantly higher T (average +2.2 C) in T E than in T A , possibly caused by acclimation or by shorter days and lower light levels during the early part of the recovery in T E compared with T A . The results suggest that predicted future climate changes will cause prominent stimulation of photosynthetic CO 2 uptake in boreal Norway spruce forest during spring, mainly caused by elevated T, but also elevated [CO 2 ]. However, the effects of elevated T may not be linearly extrapolated to future warmer climates. Article in Journal/Newspaper Northern Sweden eCite UTAS (University of Tasmania) Norway Tree Physiology 33 11 1177 1191 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Biological Sciences Ecology Ecological Physiology |
spellingShingle |
Biological Sciences Ecology Ecological Physiology Wallin, G Hall, M Slaney, M Rantfors, M Medhurst, J Linder, S Spring photosynthetic recovery of boreal Norway spruce under conditions of elevated [CO 2 ] and air temperature |
topic_facet |
Biological Sciences Ecology Ecological Physiology |
description |
Accumulated carbon uptake, apparent quantum yield (AQY) and light-saturated net CO 2 assimilation (A sat ) were used to assess the responses of photosynthesis to environmental conditions during spring for three consecutive years. Whole-tree chambers were used to expose 40-year-old field-grown Norway spruce trees in northern Sweden to an elevated atmospheric CO 2 concentration, [CO 2 ], of 700 mol CO 2 mol -1 (C E ) and an air temperature ( T ) between 2.8 and 5.6C above ambient T (T E ), during summer and winter. Net shoot CO 2 exchange (A net ) was measured continuously on 1-year-old shoots and was used to calculate the accumulated carbon uptake and daily A sat and AQY. The accumulated carbon uptake, from 1 March to 30 June, was stimulated by 33, 44 and 61% when trees were exposed to C E , T E , and C E and T E combined, respectively. Air temperature strongly influenced the timing and extent of photosynthetic recovery expressed as AQY and A sat during the spring. Under elevated T (T E ), the recovery of AQY and A sat commenced ㅂ days earlier and the activity of these parameters was significantly higher throughout the recovery period. In the absence of frost events, the photosynthetic recovery period was less than a week. However, frost events during spring slowed recovery so that full recovery could take up to 60 days to complete. Elevated [CO 2 ] stimulated AQY and A sat on average by ㅂ and ㅪ%, respectively, throughout the recovery period, but had minimal or no effect on the onset and length of the photosynthetic recovery period during the spring. However, AQY, A sat and A net all recovered at significantly higher T (average +2.2 C) in T E than in T A , possibly caused by acclimation or by shorter days and lower light levels during the early part of the recovery in T E compared with T A . The results suggest that predicted future climate changes will cause prominent stimulation of photosynthetic CO 2 uptake in boreal Norway spruce forest during spring, mainly caused by elevated T, but also elevated [CO 2 ]. However, the effects of elevated T may not be linearly extrapolated to future warmer climates. |
format |
Article in Journal/Newspaper |
author |
Wallin, G Hall, M Slaney, M Rantfors, M Medhurst, J Linder, S |
author_facet |
Wallin, G Hall, M Slaney, M Rantfors, M Medhurst, J Linder, S |
author_sort |
Wallin, G |
title |
Spring photosynthetic recovery of boreal Norway spruce under conditions of elevated [CO 2 ] and air temperature |
title_short |
Spring photosynthetic recovery of boreal Norway spruce under conditions of elevated [CO 2 ] and air temperature |
title_full |
Spring photosynthetic recovery of boreal Norway spruce under conditions of elevated [CO 2 ] and air temperature |
title_fullStr |
Spring photosynthetic recovery of boreal Norway spruce under conditions of elevated [CO 2 ] and air temperature |
title_full_unstemmed |
Spring photosynthetic recovery of boreal Norway spruce under conditions of elevated [CO 2 ] and air temperature |
title_sort |
spring photosynthetic recovery of boreal norway spruce under conditions of elevated [co 2 ] and air temperature |
publisher |
Oxford University Press |
publishDate |
2013 |
url |
https://doi.org/10.1093/treephys/tpt066 http://www.ncbi.nlm.nih.gov/pubmed/24169104 http://ecite.utas.edu.au/89630 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_relation |
http://dx.doi.org/10.1093/treephys/tpt066 Wallin, G and Hall, M and Slaney, M and Rantfors, M and Medhurst, J and Linder, S, Spring photosynthetic recovery of boreal Norway spruce under conditions of elevated [CO 2 ] and air temperature, Tree Physiology, 33, (11) pp. 1177-1191. ISSN 0829-318X (2013) [Refereed Article] http://www.ncbi.nlm.nih.gov/pubmed/24169104 http://ecite.utas.edu.au/89630 |
op_doi |
https://doi.org/10.1093/treephys/tpt066 |
container_title |
Tree Physiology |
container_volume |
33 |
container_issue |
11 |
container_start_page |
1177 |
op_container_end_page |
1191 |
_version_ |
1766148048532013056 |