Spring photosynthetic recovery of boreal Norway spruce under conditions of elevated [CO2] and air temperature
Accumulated carbon uptake, apparent quantum yield (AQY) and light-saturated net CO2 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...
Published in: | Tree Physiology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Oxford University Press
2013
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Online Access: | https://lup.lub.lu.se/record/4272518 https://doi.org/10.1093/treephys/tpt066 |
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ftulundlup:oai:lup.lub.lu.se:fd6a6208-5fea-4759-8b20-cda45347f5f0 2023-05-15T17:45:13+02:00 Spring photosynthetic recovery of boreal Norway spruce under conditions of elevated [CO2] and air temperature Wallin, Goran Hall, Marianne Slaney, Michelle Räntfors, Mats Medhurst, Jane Linder, Sune 2013 https://lup.lub.lu.se/record/4272518 https://doi.org/10.1093/treephys/tpt066 eng eng Oxford University Press https://lup.lub.lu.se/record/4272518 http://dx.doi.org/10.1093/treephys/tpt066 wos:000328374500005 scopus:84890259488 pmid:24169104 Tree Physiology; 33(11), pp 1177-1191 (2013) ISSN: 1758-4469 Earth and Related Environmental Sciences apparent quantum yield boreal forest carbon dioxide climate change light-saturated photosynthesis Picea abies whole-tree chambers contributiontojournal/article info:eu-repo/semantics/article text 2013 ftulundlup https://doi.org/10.1093/treephys/tpt066 2023-02-01T23:26:54Z Accumulated carbon uptake, apparent quantum yield (AQY) and light-saturated net CO2 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 CO2 concentration, [CO2], of 700 mu mol CO2 mol(-1) (C-E) and an air temperature (T) between 2.8 and 5.6 degrees C above ambient T (T-E), during summer and winter. Net shoot CO2 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 similar to 10 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 [CO2] stimulated AQY and A(sat) on average by similar to 10 and similar to 50%, 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 degrees 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 CO2 uptake in boreal Norway spruce forest during spring, mainly caused ... Article in Journal/Newspaper Northern Sweden Lund University Publications (LUP) Norway Tree Physiology 33 11 1177 1191 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Earth and Related Environmental Sciences apparent quantum yield boreal forest carbon dioxide climate change light-saturated photosynthesis Picea abies whole-tree chambers |
spellingShingle |
Earth and Related Environmental Sciences apparent quantum yield boreal forest carbon dioxide climate change light-saturated photosynthesis Picea abies whole-tree chambers Wallin, Goran Hall, Marianne Slaney, Michelle Räntfors, Mats Medhurst, Jane Linder, Sune Spring photosynthetic recovery of boreal Norway spruce under conditions of elevated [CO2] and air temperature |
topic_facet |
Earth and Related Environmental Sciences apparent quantum yield boreal forest carbon dioxide climate change light-saturated photosynthesis Picea abies whole-tree chambers |
description |
Accumulated carbon uptake, apparent quantum yield (AQY) and light-saturated net CO2 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 CO2 concentration, [CO2], of 700 mu mol CO2 mol(-1) (C-E) and an air temperature (T) between 2.8 and 5.6 degrees C above ambient T (T-E), during summer and winter. Net shoot CO2 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 similar to 10 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 [CO2] stimulated AQY and A(sat) on average by similar to 10 and similar to 50%, 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 degrees 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 CO2 uptake in boreal Norway spruce forest during spring, mainly caused ... |
format |
Article in Journal/Newspaper |
author |
Wallin, Goran Hall, Marianne Slaney, Michelle Räntfors, Mats Medhurst, Jane Linder, Sune |
author_facet |
Wallin, Goran Hall, Marianne Slaney, Michelle Räntfors, Mats Medhurst, Jane Linder, Sune |
author_sort |
Wallin, Goran |
title |
Spring photosynthetic recovery of boreal Norway spruce under conditions of elevated [CO2] and air temperature |
title_short |
Spring photosynthetic recovery of boreal Norway spruce under conditions of elevated [CO2] and air temperature |
title_full |
Spring photosynthetic recovery of boreal Norway spruce under conditions of elevated [CO2] and air temperature |
title_fullStr |
Spring photosynthetic recovery of boreal Norway spruce under conditions of elevated [CO2] and air temperature |
title_full_unstemmed |
Spring photosynthetic recovery of boreal Norway spruce under conditions of elevated [CO2] and air temperature |
title_sort |
spring photosynthetic recovery of boreal norway spruce under conditions of elevated [co2] and air temperature |
publisher |
Oxford University Press |
publishDate |
2013 |
url |
https://lup.lub.lu.se/record/4272518 https://doi.org/10.1093/treephys/tpt066 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_source |
Tree Physiology; 33(11), pp 1177-1191 (2013) ISSN: 1758-4469 |
op_relation |
https://lup.lub.lu.se/record/4272518 http://dx.doi.org/10.1093/treephys/tpt066 wos:000328374500005 scopus:84890259488 pmid:24169104 |
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_ |
1766148059248459776 |