Frost survival and gene expression in timothy ( Phleum pratense L.) cultivars as affected by age and selection in diverse field environments
Abstract The sustainable production of perennial grasses in Northern Norway is at risk due to the ongoing climate change. The predicted increase in temperatures and variable weather patterns are further expected to create challenges for winter survival of timothy ( Phleum pratense L.). Knowledge abo...
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crwiley:10.1111/ppl.14217 2024-09-15T18:25:49+00:00 Frost survival and gene expression in timothy ( Phleum pratense L.) cultivars as affected by age and selection in diverse field environments Pashapu, Akhil Reddy Dalmannsdottir, Sigridur Jørgensen, Marit Schubert, Marian Rognli, Odd Arne Kovi, Mallikarjuna Rao Norges Forskningsråd 2024 http://dx.doi.org/10.1111/ppl.14217 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ppl.14217 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Physiologia Plantarum volume 176, issue 1 ISSN 0031-9317 1399-3054 journal-article 2024 crwiley https://doi.org/10.1111/ppl.14217 2024-08-06T04:16:33Z Abstract The sustainable production of perennial grasses in Northern Norway is at risk due to the ongoing climate change. The predicted increase in temperatures and variable weather patterns are further expected to create challenges for winter survival of timothy ( Phleum pratense L.). Knowledge about the molecular mechanisms underlying freezing tolerance is crucial for developing robust cultivars. The current study is aimed at identifying genes involved in freezing stress response of timothy and studying gene expression differentiation due to field selection in contrasting environments using RNAseq. Four timothy cultivars were field tested for three years in Tromsø and Vesterålen, in Northern Norway. The surviving material from the field tests, along with plants raised from the original seed lots, were subjected to freezing tests. LT 50 values varied across cultivars and materials. Many genes coding for transcription factors and proteins known to play an important role in freezing tolerance, like dehydrins, c‐repeat binding factors, and late embryogenesis abundant proteins were upregulated with decreasing temperatures. Moreover, genes associated with glycolysis/gluconeogenesis, TCA cycle, glutathione metabolism, proteasome pathways and genes encoding autophagy‐related proteins, plasma membrane‐associated proteins, sugar and amino acid transporters had elevated expression in field survivors compared to plants raised from the original material. The lower freezing stress tolerance of field survivors despite the elevated expression of several stress‐responsive genes might be due to a combination of selection in the field and the age effect. Furthermore, differences in freezing stress response between northern and southern adapted cultivars and surviving material from two field trial locations are discussed. Article in Journal/Newspaper Northern Norway Tromsø Vesterålen Wiley Online Library Physiologia Plantarum 176 1 |
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English |
description |
Abstract The sustainable production of perennial grasses in Northern Norway is at risk due to the ongoing climate change. The predicted increase in temperatures and variable weather patterns are further expected to create challenges for winter survival of timothy ( Phleum pratense L.). Knowledge about the molecular mechanisms underlying freezing tolerance is crucial for developing robust cultivars. The current study is aimed at identifying genes involved in freezing stress response of timothy and studying gene expression differentiation due to field selection in contrasting environments using RNAseq. Four timothy cultivars were field tested for three years in Tromsø and Vesterålen, in Northern Norway. The surviving material from the field tests, along with plants raised from the original seed lots, were subjected to freezing tests. LT 50 values varied across cultivars and materials. Many genes coding for transcription factors and proteins known to play an important role in freezing tolerance, like dehydrins, c‐repeat binding factors, and late embryogenesis abundant proteins were upregulated with decreasing temperatures. Moreover, genes associated with glycolysis/gluconeogenesis, TCA cycle, glutathione metabolism, proteasome pathways and genes encoding autophagy‐related proteins, plasma membrane‐associated proteins, sugar and amino acid transporters had elevated expression in field survivors compared to plants raised from the original material. The lower freezing stress tolerance of field survivors despite the elevated expression of several stress‐responsive genes might be due to a combination of selection in the field and the age effect. Furthermore, differences in freezing stress response between northern and southern adapted cultivars and surviving material from two field trial locations are discussed. |
author2 |
Norges Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Pashapu, Akhil Reddy Dalmannsdottir, Sigridur Jørgensen, Marit Schubert, Marian Rognli, Odd Arne Kovi, Mallikarjuna Rao |
spellingShingle |
Pashapu, Akhil Reddy Dalmannsdottir, Sigridur Jørgensen, Marit Schubert, Marian Rognli, Odd Arne Kovi, Mallikarjuna Rao Frost survival and gene expression in timothy ( Phleum pratense L.) cultivars as affected by age and selection in diverse field environments |
author_facet |
Pashapu, Akhil Reddy Dalmannsdottir, Sigridur Jørgensen, Marit Schubert, Marian Rognli, Odd Arne Kovi, Mallikarjuna Rao |
author_sort |
Pashapu, Akhil Reddy |
title |
Frost survival and gene expression in timothy ( Phleum pratense L.) cultivars as affected by age and selection in diverse field environments |
title_short |
Frost survival and gene expression in timothy ( Phleum pratense L.) cultivars as affected by age and selection in diverse field environments |
title_full |
Frost survival and gene expression in timothy ( Phleum pratense L.) cultivars as affected by age and selection in diverse field environments |
title_fullStr |
Frost survival and gene expression in timothy ( Phleum pratense L.) cultivars as affected by age and selection in diverse field environments |
title_full_unstemmed |
Frost survival and gene expression in timothy ( Phleum pratense L.) cultivars as affected by age and selection in diverse field environments |
title_sort |
frost survival and gene expression in timothy ( phleum pratense l.) cultivars as affected by age and selection in diverse field environments |
publisher |
Wiley |
publishDate |
2024 |
url |
http://dx.doi.org/10.1111/ppl.14217 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ppl.14217 |
genre |
Northern Norway Tromsø Vesterålen |
genre_facet |
Northern Norway Tromsø Vesterålen |
op_source |
Physiologia Plantarum volume 176, issue 1 ISSN 0031-9317 1399-3054 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/ppl.14217 |
container_title |
Physiologia Plantarum |
container_volume |
176 |
container_issue |
1 |
_version_ |
1810466288985702400 |