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Testing the chilling‐ before drought‐tolerance hypothesis in Pooideae grasses
Temperate Pooideae are a large clade of economically important grasses distributed in some of the Earth's coldest and driest terrestrial environments. Previous studies have inferred that Pooideae diversified from their tropical ancestors in a cold montane habitat, suggesting that above‐freezing...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10107940/ https://www.ncbi.nlm.nih.gov/pubmed/36420966 http://dx.doi.org/10.1111/mec.16794 |
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author | Das, Aayudh Dedon, Natalie Enders, Daniel J. Fjellheim, Siri Preston, Jill C. |
author_facet | Das, Aayudh Dedon, Natalie Enders, Daniel J. Fjellheim, Siri Preston, Jill C. |
author_sort | Das, Aayudh |
collection | PubMed |
description | Temperate Pooideae are a large clade of economically important grasses distributed in some of the Earth's coldest and driest terrestrial environments. Previous studies have inferred that Pooideae diversified from their tropical ancestors in a cold montane habitat, suggesting that above‐freezing cold (chilling) tolerance evolved early in the subfamily. By contrast, drought tolerance is hypothesized to have evolved multiple times independently in response to global aridification that occurred after the split of Pooideae tribes. To independently test predictions of the chilling‐before‐drought hypothesis in Pooideae, we assessed conservation of whole plant and gene expression traits in response to chilling vs. drought. We demonstrated that both trait responses are more similar across tribes in cold as compared to drought, suggesting that chilling responses evolved before, and drought responses after, tribe diversification. Moreover, we found significantly more overlap between drought and chilling responsive genes within a species than between drought responsive genes across species, providing evidence that chilling tolerance genes acted as precursors for the novel acquisition of increased drought tolerance multiple times independently, partially through the cooption of chilling responsive genes. |
format | Online Article Text |
id | pubmed-10107940 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-101079402023-04-18 Testing the chilling‐ before drought‐tolerance hypothesis in Pooideae grasses Das, Aayudh Dedon, Natalie Enders, Daniel J. Fjellheim, Siri Preston, Jill C. Mol Ecol ORIGINAL ARTICLES Temperate Pooideae are a large clade of economically important grasses distributed in some of the Earth's coldest and driest terrestrial environments. Previous studies have inferred that Pooideae diversified from their tropical ancestors in a cold montane habitat, suggesting that above‐freezing cold (chilling) tolerance evolved early in the subfamily. By contrast, drought tolerance is hypothesized to have evolved multiple times independently in response to global aridification that occurred after the split of Pooideae tribes. To independently test predictions of the chilling‐before‐drought hypothesis in Pooideae, we assessed conservation of whole plant and gene expression traits in response to chilling vs. drought. We demonstrated that both trait responses are more similar across tribes in cold as compared to drought, suggesting that chilling responses evolved before, and drought responses after, tribe diversification. Moreover, we found significantly more overlap between drought and chilling responsive genes within a species than between drought responsive genes across species, providing evidence that chilling tolerance genes acted as precursors for the novel acquisition of increased drought tolerance multiple times independently, partially through the cooption of chilling responsive genes. John Wiley and Sons Inc. 2022-12-07 2023-02 /pmc/articles/PMC10107940/ /pubmed/36420966 http://dx.doi.org/10.1111/mec.16794 Text en © 2022 The Authors. Molecular Ecology published by John Wiley & Sons Ltd. https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ (https://creativecommons.org/licenses/by-nc-nd/4.0/) License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made. |
spellingShingle | ORIGINAL ARTICLES Das, Aayudh Dedon, Natalie Enders, Daniel J. Fjellheim, Siri Preston, Jill C. Testing the chilling‐ before drought‐tolerance hypothesis in Pooideae grasses |
title | Testing the chilling‐ before drought‐tolerance hypothesis in Pooideae grasses |
title_full | Testing the chilling‐ before drought‐tolerance hypothesis in Pooideae grasses |
title_fullStr | Testing the chilling‐ before drought‐tolerance hypothesis in Pooideae grasses |
title_full_unstemmed | Testing the chilling‐ before drought‐tolerance hypothesis in Pooideae grasses |
title_short | Testing the chilling‐ before drought‐tolerance hypothesis in Pooideae grasses |
title_sort | testing the chilling‐ before drought‐tolerance hypothesis in pooideae grasses |
topic | ORIGINAL ARTICLES |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10107940/ https://www.ncbi.nlm.nih.gov/pubmed/36420966 http://dx.doi.org/10.1111/mec.16794 |
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