The Influence of Season and Phenology on Freezing Tolerance in Silene acaulis L., a Subarctic and Arctic Cushion Plant of Circumpolar Distribution
Changes in the freezing tolerance for Silene acaulis L., a subarctic and arctic species of circumpolar distribution, were examined to understand the extent of cold hardening and dehardening that occurs seasonally and with changes in plant phenology. Shoots of whole plants collected on a mountain rid...
Published in: | Annals of Botany |
---|---|
Main Authors: | , |
Format: | Text |
Language: | English |
Published: |
Oxford University Press
1993
|
Subjects: | |
Online Access: | http://aob.oxfordjournals.org/cgi/content/short/71/5/423 https://doi.org/10.1006/anbo.1993.1054 |
id |
fthighwire:oai:open-archive.highwire.org:annbot:71/5/423 |
---|---|
record_format |
openpolar |
spelling |
fthighwire:oai:open-archive.highwire.org:annbot:71/5/423 2023-05-15T14:57:12+02:00 The Influence of Season and Phenology on Freezing Tolerance in Silene acaulis L., a Subarctic and Arctic Cushion Plant of Circumpolar Distribution Junttila, O. Robberecht, R. 1993-05-01 00:00:00.0 text/html http://aob.oxfordjournals.org/cgi/content/short/71/5/423 https://doi.org/10.1006/anbo.1993.1054 en eng Oxford University Press http://aob.oxfordjournals.org/cgi/content/short/71/5/423 http://dx.doi.org/10.1006/anbo.1993.1054 Copyright (C) 1993, Oxford University Press REGULAR ARTICLE TEXT 1993 fthighwire https://doi.org/10.1006/anbo.1993.1054 2013-05-26T18:36:02Z Changes in the freezing tolerance for Silene acaulis L., a subarctic and arctic species of circumpolar distribution, were examined to understand the extent of cold hardening and dehardening that occurs seasonally and with changes in plant phenology. Shoots of whole plants collected on a mountain ridge near Tromsø, Norway (69° N, 700 m above sea level) were frozen under controlled conditions at cooling rates of 3 to 4°C h-1. The extent of freezing-induced injury was examined both by chlorophyll fluorescence and by visual inspection with a microscope. A freezing tolerance level of -30°C was observed in mid-winter, based on a 50% lethal point for freezing injury. Loss of cold hardiness was substantial in mid-summer, with freezing tolerance of -8·5 to -9°C observed in mid-July. Plants still covered by snow in mid-July had a freezing tolerance of -12·5 to -13°C. The maintenance of a basic level of freezing tolerance throughout the summer may be adaptive in the northern latitude-regions because of the occurrence of episodic frosts during the growing season. Copyright 1993, 1999 Academic Press Text Arctic Silene acaulis Subarctic Tromsø HighWire Press (Stanford University) Arctic Norway Tromsø Annals of Botany 71 5 423 426 |
institution |
Open Polar |
collection |
HighWire Press (Stanford University) |
op_collection_id |
fthighwire |
language |
English |
topic |
REGULAR ARTICLE |
spellingShingle |
REGULAR ARTICLE Junttila, O. Robberecht, R. The Influence of Season and Phenology on Freezing Tolerance in Silene acaulis L., a Subarctic and Arctic Cushion Plant of Circumpolar Distribution |
topic_facet |
REGULAR ARTICLE |
description |
Changes in the freezing tolerance for Silene acaulis L., a subarctic and arctic species of circumpolar distribution, were examined to understand the extent of cold hardening and dehardening that occurs seasonally and with changes in plant phenology. Shoots of whole plants collected on a mountain ridge near Tromsø, Norway (69° N, 700 m above sea level) were frozen under controlled conditions at cooling rates of 3 to 4°C h-1. The extent of freezing-induced injury was examined both by chlorophyll fluorescence and by visual inspection with a microscope. A freezing tolerance level of -30°C was observed in mid-winter, based on a 50% lethal point for freezing injury. Loss of cold hardiness was substantial in mid-summer, with freezing tolerance of -8·5 to -9°C observed in mid-July. Plants still covered by snow in mid-July had a freezing tolerance of -12·5 to -13°C. The maintenance of a basic level of freezing tolerance throughout the summer may be adaptive in the northern latitude-regions because of the occurrence of episodic frosts during the growing season. Copyright 1993, 1999 Academic Press |
format |
Text |
author |
Junttila, O. Robberecht, R. |
author_facet |
Junttila, O. Robberecht, R. |
author_sort |
Junttila, O. |
title |
The Influence of Season and Phenology on Freezing Tolerance in Silene acaulis L., a Subarctic and Arctic Cushion Plant of Circumpolar Distribution |
title_short |
The Influence of Season and Phenology on Freezing Tolerance in Silene acaulis L., a Subarctic and Arctic Cushion Plant of Circumpolar Distribution |
title_full |
The Influence of Season and Phenology on Freezing Tolerance in Silene acaulis L., a Subarctic and Arctic Cushion Plant of Circumpolar Distribution |
title_fullStr |
The Influence of Season and Phenology on Freezing Tolerance in Silene acaulis L., a Subarctic and Arctic Cushion Plant of Circumpolar Distribution |
title_full_unstemmed |
The Influence of Season and Phenology on Freezing Tolerance in Silene acaulis L., a Subarctic and Arctic Cushion Plant of Circumpolar Distribution |
title_sort |
influence of season and phenology on freezing tolerance in silene acaulis l., a subarctic and arctic cushion plant of circumpolar distribution |
publisher |
Oxford University Press |
publishDate |
1993 |
url |
http://aob.oxfordjournals.org/cgi/content/short/71/5/423 https://doi.org/10.1006/anbo.1993.1054 |
geographic |
Arctic Norway Tromsø |
geographic_facet |
Arctic Norway Tromsø |
genre |
Arctic Silene acaulis Subarctic Tromsø |
genre_facet |
Arctic Silene acaulis Subarctic Tromsø |
op_relation |
http://aob.oxfordjournals.org/cgi/content/short/71/5/423 http://dx.doi.org/10.1006/anbo.1993.1054 |
op_rights |
Copyright (C) 1993, Oxford University Press |
op_doi |
https://doi.org/10.1006/anbo.1993.1054 |
container_title |
Annals of Botany |
container_volume |
71 |
container_issue |
5 |
container_start_page |
423 |
op_container_end_page |
426 |
_version_ |
1766329280788168704 |