The impact of temperature regimes on development, dormancy breaking and germination of dwarf shrub seeds from arctic, alpine and boreal sites
En undersøgelse af spiringsevnen af frø fra arktiske dværgbuske med forskellig oprindelse udsat for forskellige temperaturer under spiring. Forsøget viser at varmere somre vil kunne øge chancen for spiring fra frø hos arter af mosebølle og revling i arktisk/alpin tundra, mens varmere vintre kan forø...
Published in: | Plant Ecology |
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Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2008
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Online Access: | https://pure.au.dk/portal/da/publications/the-impact-of-temperature-regimes-on-development-dormancy-breaking-and-germination-of-dwarf-shrub-seeds-from-arctic-alpine-and-boreal-sites(402e6dd0-1d1b-11dd-be51-000ea68e967b).html https://doi.org/10.1007/s11258-008-9403-4 http://springerlink.metapress.com/content/u7p13155571l4646/fulltext.pdf |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/402e6dd0-1d1b-11dd-be51-000ea68e967b 2023-05-15T14:24:48+02:00 The impact of temperature regimes on development, dormancy breaking and germination of dwarf shrub seeds from arctic, alpine and boreal sites Graae, Bente Jessen Alsos, Inger Greve Ejrnæs, Rasmus 2008 https://pure.au.dk/portal/da/publications/the-impact-of-temperature-regimes-on-development-dormancy-breaking-and-germination-of-dwarf-shrub-seeds-from-arctic-alpine-and-boreal-sites(402e6dd0-1d1b-11dd-be51-000ea68e967b).html https://doi.org/10.1007/s11258-008-9403-4 http://springerlink.metapress.com/content/u7p13155571l4646/fulltext.pdf eng eng info:eu-repo/semantics/restrictedAccess Graae , B J , Alsos , I G & Ejrnæs , R 2008 , ' The impact of temperature regimes on development, dormancy breaking and germination of dwarf shrub seeds from arctic, alpine and boreal sites ' , Plant Ecology , pp. online first . https://doi.org/10.1007/s11258-008-9403-4 Plantefrø Arktisk Vegetation Klima Temperatur Seeds Arctic Climate Temperature article 2008 ftuniaarhuspubl https://doi.org/10.1007/s11258-008-9403-4 2020-09-16T22:42:27Z En undersøgelse af spiringsevnen af frø fra arktiske dværgbuske med forskellig oprindelse udsat for forskellige temperaturer under spiring. Forsøget viser at varmere somre vil kunne øge chancen for spiring fra frø hos arter af mosebølle og revling i arktisk/alpin tundra, mens varmere vintre kan forøge mortaliteten af frø som følge af svampeangreb. It has been suggested that the infrequent sexual reproduction of arctic dwarf shrubs might be related to the harsh environmental conditions in which they live. If this is the case, then increases in temperature resulting from global climate change might drastically affect regeneration of arctic species. We examined whether recruitment of Empetrum nigrum ssp. hermaphroditum and Vaccinium uliginosum (hereafter E. nigrum and V. uliginosum ) was affected by temperature during three reproductive stages: seed development, dormancy breakage and germination. Seeds were collected from an arctic, an alpine (only E. nigrum ) and a boreal site with different climates; stored at different winter temperatures and incubated for germination at different temperatures. Seeds of V. uliginosum developed in the boreal region had a higher percentage germination than did seeds developed in the Arctic. In contrast, seeds of E. nigrum from the arctic site had a higher or similar percentage germination than did seeds from the alpine and boreal sites. Increased winter temperatures had no significant effect on resulting germination percentage of E. nigrum . However, V. uliginosum seeds from the arctic site suffered increased fungal attack (and thus decreased germination) when they were stratified under high winter temperatures. Seeds of both species increased germination with increased incubation temperatures. Our results suggest that both species would increase their germination in response to warmer summers. Longer summers might also favour the slow-germinating E. nigrum . However, increased winter temperatures might increase mortality due to fungal attack in V. uliginosum ecotypes that are not adapted to mild winters. Article in Journal/Newspaper Arctic Arctic Arktis* Climate change Empetrum nigrum Tundra Mosebølle Aarhus University: Research Arctic Plant Ecology 198 2 275 284 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Plantefrø Arktisk Vegetation Klima Temperatur Seeds Arctic Climate Temperature |
spellingShingle |
Plantefrø Arktisk Vegetation Klima Temperatur Seeds Arctic Climate Temperature Graae, Bente Jessen Alsos, Inger Greve Ejrnæs, Rasmus The impact of temperature regimes on development, dormancy breaking and germination of dwarf shrub seeds from arctic, alpine and boreal sites |
topic_facet |
Plantefrø Arktisk Vegetation Klima Temperatur Seeds Arctic Climate Temperature |
description |
En undersøgelse af spiringsevnen af frø fra arktiske dværgbuske med forskellig oprindelse udsat for forskellige temperaturer under spiring. Forsøget viser at varmere somre vil kunne øge chancen for spiring fra frø hos arter af mosebølle og revling i arktisk/alpin tundra, mens varmere vintre kan forøge mortaliteten af frø som følge af svampeangreb. It has been suggested that the infrequent sexual reproduction of arctic dwarf shrubs might be related to the harsh environmental conditions in which they live. If this is the case, then increases in temperature resulting from global climate change might drastically affect regeneration of arctic species. We examined whether recruitment of Empetrum nigrum ssp. hermaphroditum and Vaccinium uliginosum (hereafter E. nigrum and V. uliginosum ) was affected by temperature during three reproductive stages: seed development, dormancy breakage and germination. Seeds were collected from an arctic, an alpine (only E. nigrum ) and a boreal site with different climates; stored at different winter temperatures and incubated for germination at different temperatures. Seeds of V. uliginosum developed in the boreal region had a higher percentage germination than did seeds developed in the Arctic. In contrast, seeds of E. nigrum from the arctic site had a higher or similar percentage germination than did seeds from the alpine and boreal sites. Increased winter temperatures had no significant effect on resulting germination percentage of E. nigrum . However, V. uliginosum seeds from the arctic site suffered increased fungal attack (and thus decreased germination) when they were stratified under high winter temperatures. Seeds of both species increased germination with increased incubation temperatures. Our results suggest that both species would increase their germination in response to warmer summers. Longer summers might also favour the slow-germinating E. nigrum . However, increased winter temperatures might increase mortality due to fungal attack in V. uliginosum ecotypes that are not adapted to mild winters. |
format |
Article in Journal/Newspaper |
author |
Graae, Bente Jessen Alsos, Inger Greve Ejrnæs, Rasmus |
author_facet |
Graae, Bente Jessen Alsos, Inger Greve Ejrnæs, Rasmus |
author_sort |
Graae, Bente Jessen |
title |
The impact of temperature regimes on development, dormancy breaking and germination of dwarf shrub seeds from arctic, alpine and boreal sites |
title_short |
The impact of temperature regimes on development, dormancy breaking and germination of dwarf shrub seeds from arctic, alpine and boreal sites |
title_full |
The impact of temperature regimes on development, dormancy breaking and germination of dwarf shrub seeds from arctic, alpine and boreal sites |
title_fullStr |
The impact of temperature regimes on development, dormancy breaking and germination of dwarf shrub seeds from arctic, alpine and boreal sites |
title_full_unstemmed |
The impact of temperature regimes on development, dormancy breaking and germination of dwarf shrub seeds from arctic, alpine and boreal sites |
title_sort |
impact of temperature regimes on development, dormancy breaking and germination of dwarf shrub seeds from arctic, alpine and boreal sites |
publishDate |
2008 |
url |
https://pure.au.dk/portal/da/publications/the-impact-of-temperature-regimes-on-development-dormancy-breaking-and-germination-of-dwarf-shrub-seeds-from-arctic-alpine-and-boreal-sites(402e6dd0-1d1b-11dd-be51-000ea68e967b).html https://doi.org/10.1007/s11258-008-9403-4 http://springerlink.metapress.com/content/u7p13155571l4646/fulltext.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Arktis* Climate change Empetrum nigrum Tundra Mosebølle |
genre_facet |
Arctic Arctic Arktis* Climate change Empetrum nigrum Tundra Mosebølle |
op_source |
Graae , B J , Alsos , I G & Ejrnæs , R 2008 , ' The impact of temperature regimes on development, dormancy breaking and germination of dwarf shrub seeds from arctic, alpine and boreal sites ' , Plant Ecology , pp. online first . https://doi.org/10.1007/s11258-008-9403-4 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1007/s11258-008-9403-4 |
container_title |
Plant Ecology |
container_volume |
198 |
container_issue |
2 |
container_start_page |
275 |
op_container_end_page |
284 |
_version_ |
1766297252172660736 |