The role of photoperiodism in alpine plant development
Is alpine plant development in spring controlled by photoperiod irrespective of actual temperatures at the time following snowmelt? We investigated phenological responses to day length and temperature in 33 high-elevation species of the Central Alps (2600-3200 m a.s.l.), Austria. Plants were collect...
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Institute of Arctic and Alpine Research [of the] University of Colorado
2003
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ftunivbasel:oai:edoc.unibas.ch:8568 2023-05-15T14:14:40+02:00 The role of photoperiodism in alpine plant development Keller, F. Körner, Christian 2003 application/pdf http://edoc.unibas.ch/dok/A5249104 https://edoc.unibas.ch/8568/ https://edoc.unibas.ch/8568/1/1523-0430%25282003%2529035%255B0361%253Atropia%255D2.0.co%253B2.pdf https://doi.org/10.1657/1523-0430(2003)035[0361:TROPIA]2.0.CO;2 eng eng Institute of Arctic and Alpine Research [of the] University of Colorado https://edoc.unibas.ch/8568/1/1523-0430%25282003%2529035%255B0361%253Atropia%255D2.0.co%253B2.pdf Keller, F. and Körner, Christian. (2003) The role of photoperiodism in alpine plant development. Arctic, Antarctic, and Alpine Research, 35 (3). pp. 361-368. info:isi/000185999300010 doi:10.1657/1523-0430(2003)035[0361:TROPIA]2.0.CO;2 urn:ISSN:1523-0430 urn:ISSN:1938-4246 info:eu-repo/semantics/openAccess Article PeerReviewed 2003 ftunivbasel https://doi.org/10.1657/1523-0430(2003)035[0361:TROPIA]2.0.CO;2 2023-03-05T06:50:15Z Is alpine plant development in spring controlled by photoperiod irrespective of actual temperatures at the time following snowmelt? We investigated phenological responses to day length and temperature in 33 high-elevation species of the Central Alps (2600-3200 m a.s.l.), Austria. Plants were collected in the field in August, potted, and overwintered in a freezer at -1degreesC. Released from dormancy, plants experienced various photoperiods (12, 14.5, 15, and 16 h) and two temperature regimes (6/11degreesC and 8/18degreesC). Day length was extended with tungsten lamps, which do not contribute a significant dose of photosynthetically active photon flux density but provide a day-length signal. Only 23 species produced sufficient flowers to be included in the analysis. Flowering (yes or no) was sensitive to photoperiod in 54 species showed temperature sensitivity at longer photoperiods, whereas at shorter photoperiods, 65 increase in temperature. The number of days between thawing of soil and flowering is sensitive to photoperiod in 46 uniflorum, Elyna myosuroides, Saxifraga oppositifolia, Saxifraga seguieri, and Ranunculus glacialis are insensitive to both photoperiod and temperature and thus flower as soon as released from the snow irrespective of co-occurring light and temperature on of leafing were responsive to photoperiod. These results suggest that about half of the conditions. Specific leaf area and the duration of leafing were responsive to photoperiod and temperature in forbs but not in grasses. These results suggest that about half of the tested alpine species are sensitive to photoperiod and may not be able to fully utilize periods of earlier snowmelt. Article in Journal/Newspaper Antarctic and Alpine Research Arctic Ranunculus glacialis Saxifraga oppositifolia University of Basel: edoc |
institution |
Open Polar |
collection |
University of Basel: edoc |
op_collection_id |
ftunivbasel |
language |
English |
description |
Is alpine plant development in spring controlled by photoperiod irrespective of actual temperatures at the time following snowmelt? We investigated phenological responses to day length and temperature in 33 high-elevation species of the Central Alps (2600-3200 m a.s.l.), Austria. Plants were collected in the field in August, potted, and overwintered in a freezer at -1degreesC. Released from dormancy, plants experienced various photoperiods (12, 14.5, 15, and 16 h) and two temperature regimes (6/11degreesC and 8/18degreesC). Day length was extended with tungsten lamps, which do not contribute a significant dose of photosynthetically active photon flux density but provide a day-length signal. Only 23 species produced sufficient flowers to be included in the analysis. Flowering (yes or no) was sensitive to photoperiod in 54 species showed temperature sensitivity at longer photoperiods, whereas at shorter photoperiods, 65 increase in temperature. The number of days between thawing of soil and flowering is sensitive to photoperiod in 46 uniflorum, Elyna myosuroides, Saxifraga oppositifolia, Saxifraga seguieri, and Ranunculus glacialis are insensitive to both photoperiod and temperature and thus flower as soon as released from the snow irrespective of co-occurring light and temperature on of leafing were responsive to photoperiod. These results suggest that about half of the conditions. Specific leaf area and the duration of leafing were responsive to photoperiod and temperature in forbs but not in grasses. These results suggest that about half of the tested alpine species are sensitive to photoperiod and may not be able to fully utilize periods of earlier snowmelt. |
format |
Article in Journal/Newspaper |
author |
Keller, F. Körner, Christian |
spellingShingle |
Keller, F. Körner, Christian The role of photoperiodism in alpine plant development |
author_facet |
Keller, F. Körner, Christian |
author_sort |
Keller, F. |
title |
The role of photoperiodism in alpine plant development |
title_short |
The role of photoperiodism in alpine plant development |
title_full |
The role of photoperiodism in alpine plant development |
title_fullStr |
The role of photoperiodism in alpine plant development |
title_full_unstemmed |
The role of photoperiodism in alpine plant development |
title_sort |
role of photoperiodism in alpine plant development |
publisher |
Institute of Arctic and Alpine Research [of the] University of Colorado |
publishDate |
2003 |
url |
http://edoc.unibas.ch/dok/A5249104 https://edoc.unibas.ch/8568/ https://edoc.unibas.ch/8568/1/1523-0430%25282003%2529035%255B0361%253Atropia%255D2.0.co%253B2.pdf https://doi.org/10.1657/1523-0430(2003)035[0361:TROPIA]2.0.CO;2 |
genre |
Antarctic and Alpine Research Arctic Ranunculus glacialis Saxifraga oppositifolia |
genre_facet |
Antarctic and Alpine Research Arctic Ranunculus glacialis Saxifraga oppositifolia |
op_relation |
https://edoc.unibas.ch/8568/1/1523-0430%25282003%2529035%255B0361%253Atropia%255D2.0.co%253B2.pdf Keller, F. and Körner, Christian. (2003) The role of photoperiodism in alpine plant development. Arctic, Antarctic, and Alpine Research, 35 (3). pp. 361-368. info:isi/000185999300010 doi:10.1657/1523-0430(2003)035[0361:TROPIA]2.0.CO;2 urn:ISSN:1523-0430 urn:ISSN:1938-4246 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1657/1523-0430(2003)035[0361:TROPIA]2.0.CO;2 |
_version_ |
1766287005709238272 |