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Intraspecific variation in response to magnitude and frequency of freeze-thaw cycles in a temperate grass

Winter warming and its accompanying predicted decrease in snow pack for northern temperate regions may increase frost damage to plants induced by an increase in freeze-thaw cycles (FTCs) due to reduced insulation. FTC frequency, minimum temperature during freezing and pre-existing local adaptations...

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Autores principales: Dietrich, Charlotte C, Kreyling, Juergen, Jentsch, Anke, Malyshev, Andrey V
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5751040/
https://www.ncbi.nlm.nih.gov/pubmed/29308126
http://dx.doi.org/10.1093/aobpla/plx068
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author Dietrich, Charlotte C
Kreyling, Juergen
Jentsch, Anke
Malyshev, Andrey V
author_facet Dietrich, Charlotte C
Kreyling, Juergen
Jentsch, Anke
Malyshev, Andrey V
author_sort Dietrich, Charlotte C
collection PubMed
description Winter warming and its accompanying predicted decrease in snow pack for northern temperate regions may increase frost damage to plants induced by an increase in freeze-thaw cycles (FTCs) due to reduced insulation. FTC frequency, minimum temperature during freezing and pre-existing local adaptations potentially all influence site-specific plant responses to future climatic changes. Within a chamber experiment, frost sensitivity towards recurrent FTCs was determined in 12 Dactylis glomerata populations from various European sampling sites differing in temperature and precipitation. After winter hardening, plants were frozen at −4 and −8 °C at frequencies of one, three and seven FTCs within a 1-week treatment phase. The control was kept at 4.5 °C. Plant survival, leaf elongation, chlorophyll content and above-ground net primary productivity (ANPP) decreased with lower minimum temperatures and higher FTC frequencies, while lower freezing temperatures generally proved more influential than increased freezing frequencies. Plant survival rates correlated with the amount of annual precipitation at seed origin, as individuals from comparably drier sites exhibited higher survival rates. This response, however, was limited in its effect to low freezing temperatures (−8 °C) and low and medium freezing frequencies (1 and 3 FTCs). In the set of surviving plants, water availability at seed origin best explained the plants’ growth responses to FTC treatment. The observed intraspecific variation emphasizes the ecological importance of potential local adaptations within a more variable future winter climate.
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spelling pubmed-57510402018-01-05 Intraspecific variation in response to magnitude and frequency of freeze-thaw cycles in a temperate grass Dietrich, Charlotte C Kreyling, Juergen Jentsch, Anke Malyshev, Andrey V AoB Plants Research Articles Winter warming and its accompanying predicted decrease in snow pack for northern temperate regions may increase frost damage to plants induced by an increase in freeze-thaw cycles (FTCs) due to reduced insulation. FTC frequency, minimum temperature during freezing and pre-existing local adaptations potentially all influence site-specific plant responses to future climatic changes. Within a chamber experiment, frost sensitivity towards recurrent FTCs was determined in 12 Dactylis glomerata populations from various European sampling sites differing in temperature and precipitation. After winter hardening, plants were frozen at −4 and −8 °C at frequencies of one, three and seven FTCs within a 1-week treatment phase. The control was kept at 4.5 °C. Plant survival, leaf elongation, chlorophyll content and above-ground net primary productivity (ANPP) decreased with lower minimum temperatures and higher FTC frequencies, while lower freezing temperatures generally proved more influential than increased freezing frequencies. Plant survival rates correlated with the amount of annual precipitation at seed origin, as individuals from comparably drier sites exhibited higher survival rates. This response, however, was limited in its effect to low freezing temperatures (−8 °C) and low and medium freezing frequencies (1 and 3 FTCs). In the set of surviving plants, water availability at seed origin best explained the plants’ growth responses to FTC treatment. The observed intraspecific variation emphasizes the ecological importance of potential local adaptations within a more variable future winter climate. Oxford University Press 2017-12-01 /pmc/articles/PMC5751040/ /pubmed/29308126 http://dx.doi.org/10.1093/aobpla/plx068 Text en © The Author(s) 2017. Published by Oxford University Press on behalf of the Annals of Botany Company. http://creativecommons.org/licenses/by/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Dietrich, Charlotte C
Kreyling, Juergen
Jentsch, Anke
Malyshev, Andrey V
Intraspecific variation in response to magnitude and frequency of freeze-thaw cycles in a temperate grass
title Intraspecific variation in response to magnitude and frequency of freeze-thaw cycles in a temperate grass
title_full Intraspecific variation in response to magnitude and frequency of freeze-thaw cycles in a temperate grass
title_fullStr Intraspecific variation in response to magnitude and frequency of freeze-thaw cycles in a temperate grass
title_full_unstemmed Intraspecific variation in response to magnitude and frequency of freeze-thaw cycles in a temperate grass
title_short Intraspecific variation in response to magnitude and frequency of freeze-thaw cycles in a temperate grass
title_sort intraspecific variation in response to magnitude and frequency of freeze-thaw cycles in a temperate grass
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5751040/
https://www.ncbi.nlm.nih.gov/pubmed/29308126
http://dx.doi.org/10.1093/aobpla/plx068
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