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Cold acclimation threshold induction temperatures of switchgrass ecotypes grown under a long and short photoperiod
Plants can cold acclimate to enhance their freezing tolerance by sensing declining temperature and photoperiod cues. However, the factors influencing genotypic variation in the induction of cold acclimation are poorly understood among perennial grasses. We hypothesized that the more northern upland...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Blackwell Publishing Ltd
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9828680/ https://www.ncbi.nlm.nih.gov/pubmed/36326192 http://dx.doi.org/10.1111/ppl.13812 |
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author | Willick, Ian R. Lowry, David B. |
author_facet | Willick, Ian R. Lowry, David B. |
author_sort | Willick, Ian R. |
collection | PubMed |
description | Plants can cold acclimate to enhance their freezing tolerance by sensing declining temperature and photoperiod cues. However, the factors influencing genotypic variation in the induction of cold acclimation are poorly understood among perennial grasses. We hypothesized that the more northern upland switchgrass (Panicum virgatum L.) ecotype develops a higher degree of freezing tolerance by initiating cold acclimation at higher temperatures as compared with the coastal and southern lowland ecotypes. First, we determined the optimal method for assessing freezing tolerance and the length of exposure to 8/4°C required to induce the maximum level of freezing tolerance in the most northern upland and most southern lowland genotypes. We characterized the maximum freezing tolerance of eight uplands, three coastal and five lowland genotypes grown for 21 days at 8/4°C and a 10 or 16 h photoperiod. Next, we identified the temperature required to induce cold acclimation by exposing the 16 genotypes for 7 days at 20–6°C constant temperatures under a 10 or 16 h photoperiod. Cold acclimation initiated at temperatures 5 and 7°C higher in upland than in coastal and lowland genotypes. Among upland genotypes the shorter photoperiod induced cold acclimation at a 1°C higher temperature. Genotypes originating from a more northern latitude initiate cold acclimation at higher temperatures and develop higher maximum freezing tolerances. An earlier response to declining temperatures may provide the upland ecotype with additional time to prepare for winter and provide an advantage when plants are subjected to the rapid changes in fall temperature associated with injurious frosts. |
format | Online Article Text |
id | pubmed-9828680 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Blackwell Publishing Ltd |
record_format | MEDLINE/PubMed |
spelling | pubmed-98286802023-01-10 Cold acclimation threshold induction temperatures of switchgrass ecotypes grown under a long and short photoperiod Willick, Ian R. Lowry, David B. Physiol Plant Original Research Plants can cold acclimate to enhance their freezing tolerance by sensing declining temperature and photoperiod cues. However, the factors influencing genotypic variation in the induction of cold acclimation are poorly understood among perennial grasses. We hypothesized that the more northern upland switchgrass (Panicum virgatum L.) ecotype develops a higher degree of freezing tolerance by initiating cold acclimation at higher temperatures as compared with the coastal and southern lowland ecotypes. First, we determined the optimal method for assessing freezing tolerance and the length of exposure to 8/4°C required to induce the maximum level of freezing tolerance in the most northern upland and most southern lowland genotypes. We characterized the maximum freezing tolerance of eight uplands, three coastal and five lowland genotypes grown for 21 days at 8/4°C and a 10 or 16 h photoperiod. Next, we identified the temperature required to induce cold acclimation by exposing the 16 genotypes for 7 days at 20–6°C constant temperatures under a 10 or 16 h photoperiod. Cold acclimation initiated at temperatures 5 and 7°C higher in upland than in coastal and lowland genotypes. Among upland genotypes the shorter photoperiod induced cold acclimation at a 1°C higher temperature. Genotypes originating from a more northern latitude initiate cold acclimation at higher temperatures and develop higher maximum freezing tolerances. An earlier response to declining temperatures may provide the upland ecotype with additional time to prepare for winter and provide an advantage when plants are subjected to the rapid changes in fall temperature associated with injurious frosts. Blackwell Publishing Ltd 2022-11-22 2022 /pmc/articles/PMC9828680/ /pubmed/36326192 http://dx.doi.org/10.1111/ppl.13812 Text en © 2022 The Authors. Physiologia Plantarum published by John Wiley & Sons Ltd on behalf of Scandinavian Plant Physiology Society. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Research Willick, Ian R. Lowry, David B. Cold acclimation threshold induction temperatures of switchgrass ecotypes grown under a long and short photoperiod |
title | Cold acclimation threshold induction temperatures of switchgrass ecotypes grown under a long and short photoperiod |
title_full | Cold acclimation threshold induction temperatures of switchgrass ecotypes grown under a long and short photoperiod |
title_fullStr | Cold acclimation threshold induction temperatures of switchgrass ecotypes grown under a long and short photoperiod |
title_full_unstemmed | Cold acclimation threshold induction temperatures of switchgrass ecotypes grown under a long and short photoperiod |
title_short | Cold acclimation threshold induction temperatures of switchgrass ecotypes grown under a long and short photoperiod |
title_sort | cold acclimation threshold induction temperatures of switchgrass ecotypes grown under a long and short photoperiod |
topic | Original Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9828680/ https://www.ncbi.nlm.nih.gov/pubmed/36326192 http://dx.doi.org/10.1111/ppl.13812 |
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