Effects of soil temperature on the carbon exchange of taiga seedlings.: II. Photosynthesis, respiration, and conductance
Potted seedlings of Poputustremutoides Michx., Populusbalsamifera L., Alnuscrispa (Ait.) Pursh., and Betulapapyrifera Marsh., hardwoods of the taiga of interior Alaska, were placed under soil-temperature treatments of 5, 15, and 25 °C with plant tops under a growth-room regime of 20-h day length and...
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Language: | English |
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1983
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Online Access: | http://dx.doi.org/10.1139/x83-115 http://www.nrcresearchpress.com/doi/pdf/10.1139/x83-115 |
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crcansciencepubl:10.1139/x83-115 2023-12-17T10:50:54+01:00 Effects of soil temperature on the carbon exchange of taiga seedlings.: II. Photosynthesis, respiration, and conductance Lawrence, William T. Oechel, Walter C. 1983 http://dx.doi.org/10.1139/x83-115 http://www.nrcresearchpress.com/doi/pdf/10.1139/x83-115 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Forest Research volume 13, issue 5, page 850-859 ISSN 0045-5067 1208-6037 Ecology Forestry Global and Planetary Change journal-article 1983 crcansciencepubl https://doi.org/10.1139/x83-115 2023-11-19T13:38:55Z Potted seedlings of Poputustremutoides Michx., Populusbalsamifera L., Alnuscrispa (Ait.) Pursh., and Betulapapyrifera Marsh., hardwoods of the taiga of interior Alaska, were placed under soil-temperature treatments of 5, 15, and 25 °C with plant tops under a growth-room regime of 20-h day length and day–night air temperatures of 25 and 20 °C, respectively. Photosynthesis showed a differential soil-temperature effect among the species. Maximum photosynthetic rates of 9.5 mg CO 2 •h −1 •dm −2 were observed for P. tremuloides at 25 °C soil and 25 °C air temperature; 9.3 mg CO 2 •h −1 •dm −2 for P. balsamifera at the same temperature combination; and 7.8 mg CO 2 •h −1 •dm −2 for A. crispa at 25 °C air temperature and the lowest soil-temperature treatment, 5 °C. The maximum photosynthetic rate observed for B. papyrifera was 4.9 mg CO 2 •h −1 •dm −2 at 25 °C soil temperature and 20 °C air temperature; low values being due to nonsaturating light conditions. Both leaf dark respiration and conductance were reduced by the 5 °C soil-temperature treatment at one or more air temperatures in all species except A. crispa which was unaffected by cold soils. A cold-soil reduction of conductance was most pronounced at air temperatures above 20 °C. Article in Journal/Newspaper taiga Alaska Canadian Science Publishing (via Crossref) Canadian Journal of Forest Research 13 5 850 859 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Ecology Forestry Global and Planetary Change |
spellingShingle |
Ecology Forestry Global and Planetary Change Lawrence, William T. Oechel, Walter C. Effects of soil temperature on the carbon exchange of taiga seedlings.: II. Photosynthesis, respiration, and conductance |
topic_facet |
Ecology Forestry Global and Planetary Change |
description |
Potted seedlings of Poputustremutoides Michx., Populusbalsamifera L., Alnuscrispa (Ait.) Pursh., and Betulapapyrifera Marsh., hardwoods of the taiga of interior Alaska, were placed under soil-temperature treatments of 5, 15, and 25 °C with plant tops under a growth-room regime of 20-h day length and day–night air temperatures of 25 and 20 °C, respectively. Photosynthesis showed a differential soil-temperature effect among the species. Maximum photosynthetic rates of 9.5 mg CO 2 •h −1 •dm −2 were observed for P. tremuloides at 25 °C soil and 25 °C air temperature; 9.3 mg CO 2 •h −1 •dm −2 for P. balsamifera at the same temperature combination; and 7.8 mg CO 2 •h −1 •dm −2 for A. crispa at 25 °C air temperature and the lowest soil-temperature treatment, 5 °C. The maximum photosynthetic rate observed for B. papyrifera was 4.9 mg CO 2 •h −1 •dm −2 at 25 °C soil temperature and 20 °C air temperature; low values being due to nonsaturating light conditions. Both leaf dark respiration and conductance were reduced by the 5 °C soil-temperature treatment at one or more air temperatures in all species except A. crispa which was unaffected by cold soils. A cold-soil reduction of conductance was most pronounced at air temperatures above 20 °C. |
format |
Article in Journal/Newspaper |
author |
Lawrence, William T. Oechel, Walter C. |
author_facet |
Lawrence, William T. Oechel, Walter C. |
author_sort |
Lawrence, William T. |
title |
Effects of soil temperature on the carbon exchange of taiga seedlings.: II. Photosynthesis, respiration, and conductance |
title_short |
Effects of soil temperature on the carbon exchange of taiga seedlings.: II. Photosynthesis, respiration, and conductance |
title_full |
Effects of soil temperature on the carbon exchange of taiga seedlings.: II. Photosynthesis, respiration, and conductance |
title_fullStr |
Effects of soil temperature on the carbon exchange of taiga seedlings.: II. Photosynthesis, respiration, and conductance |
title_full_unstemmed |
Effects of soil temperature on the carbon exchange of taiga seedlings.: II. Photosynthesis, respiration, and conductance |
title_sort |
effects of soil temperature on the carbon exchange of taiga seedlings.: ii. photosynthesis, respiration, and conductance |
publisher |
Canadian Science Publishing |
publishDate |
1983 |
url |
http://dx.doi.org/10.1139/x83-115 http://www.nrcresearchpress.com/doi/pdf/10.1139/x83-115 |
genre |
taiga Alaska |
genre_facet |
taiga Alaska |
op_source |
Canadian Journal of Forest Research volume 13, issue 5, page 850-859 ISSN 0045-5067 1208-6037 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/x83-115 |
container_title |
Canadian Journal of Forest Research |
container_volume |
13 |
container_issue |
5 |
container_start_page |
850 |
op_container_end_page |
859 |
_version_ |
1785575993757401088 |