Brassinosteroids participate in the control of basal and acquired freezing tolerance of plants
Brassinosteroids (BRs) are growth-promoting plant hormones that play a role in abiotic stress responses, but molecular modes that enable this activity remain largely unknown. Here we show that BRs participate in the regulation of freezing tolerance. BR signaling-defective mutants of Arabidopsis thal...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
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National Academy of Sciences
2016
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| Online Access: | https://eprints.nottingham.ac.uk/38945/ |
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| author | Eremina, Marina Unterholzner, Simon J. Rathnayake, Ajith I. Castellanos, Marcos Khan, Mamoona Kugler, Karl G. May, Sean Mayer, Klaus F.X. Rozhon, Wilfried Poppenberger, Brigitte |
| author_facet | Eremina, Marina Unterholzner, Simon J. Rathnayake, Ajith I. Castellanos, Marcos Khan, Mamoona Kugler, Karl G. May, Sean Mayer, Klaus F.X. Rozhon, Wilfried Poppenberger, Brigitte |
| author_sort | Eremina, Marina |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Brassinosteroids (BRs) are growth-promoting plant hormones that play a role in abiotic stress responses, but molecular modes that enable this activity remain largely unknown. Here we show that BRs participate in the regulation of freezing tolerance. BR signaling-defective mutants of Arabidopsis thaliana were hypersensitive to freezing before and after cold acclimation. The constitutive activation of BR signaling, in contrast, enhanced freezing resistance. Evidence is provided that the BR-controlled basic helix–loop–helix transcription factor CESTA (CES) can contribute to the constitutive expression of the C-REPEAT/DEHYDRATION-RESPONSIVE ELEMENT BINDING FACTOR (CBF) transcriptional regulators that control cold responsive (COR) gene expression. In addition, CBF-independent classes of BR-regulated COR genes are identified that are regulated in a BR- and CES-dependent manner during cold acclimation. A model is presented in which BRs govern different cold-responsive transcriptional cascades through the posttranslational modification of CES and redundantly acting factors. This contributes to the basal resistance against freezing stress, but also to the further improvement of this resistance through cold acclimation. |
| first_indexed | 2025-11-14T19:36:39Z |
| format | Article |
| id | nottingham-38945 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:36:39Z |
| publishDate | 2016 |
| publisher | National Academy of Sciences |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-389452020-05-04T18:18:00Z https://eprints.nottingham.ac.uk/38945/ Brassinosteroids participate in the control of basal and acquired freezing tolerance of plants Eremina, Marina Unterholzner, Simon J. Rathnayake, Ajith I. Castellanos, Marcos Khan, Mamoona Kugler, Karl G. May, Sean Mayer, Klaus F.X. Rozhon, Wilfried Poppenberger, Brigitte Brassinosteroids (BRs) are growth-promoting plant hormones that play a role in abiotic stress responses, but molecular modes that enable this activity remain largely unknown. Here we show that BRs participate in the regulation of freezing tolerance. BR signaling-defective mutants of Arabidopsis thaliana were hypersensitive to freezing before and after cold acclimation. The constitutive activation of BR signaling, in contrast, enhanced freezing resistance. Evidence is provided that the BR-controlled basic helix–loop–helix transcription factor CESTA (CES) can contribute to the constitutive expression of the C-REPEAT/DEHYDRATION-RESPONSIVE ELEMENT BINDING FACTOR (CBF) transcriptional regulators that control cold responsive (COR) gene expression. In addition, CBF-independent classes of BR-regulated COR genes are identified that are regulated in a BR- and CES-dependent manner during cold acclimation. A model is presented in which BRs govern different cold-responsive transcriptional cascades through the posttranslational modification of CES and redundantly acting factors. This contributes to the basal resistance against freezing stress, but also to the further improvement of this resistance through cold acclimation. National Academy of Sciences 2016-10-04 Article PeerReviewed Eremina, Marina, Unterholzner, Simon J., Rathnayake, Ajith I., Castellanos, Marcos, Khan, Mamoona, Kugler, Karl G., May, Sean, Mayer, Klaus F.X., Rozhon, Wilfried and Poppenberger, Brigitte (2016) Brassinosteroids participate in the control of basal and acquired freezing tolerance of plants. Proceedings of the National Academy of Sciences, 113 (40). E5982-E5991. ISSN 1091-6490 Brassinosteroid CESTA Cold Responses CBFs CBF1 http://www.pnas.org/content/113/40/E5982 doi:10.1073/pnas.1611477113 doi:10.1073/pnas.1611477113 |
| spellingShingle | Brassinosteroid CESTA Cold Responses CBFs CBF1 Eremina, Marina Unterholzner, Simon J. Rathnayake, Ajith I. Castellanos, Marcos Khan, Mamoona Kugler, Karl G. May, Sean Mayer, Klaus F.X. Rozhon, Wilfried Poppenberger, Brigitte Brassinosteroids participate in the control of basal and acquired freezing tolerance of plants |
| title | Brassinosteroids participate in the control of basal and acquired freezing tolerance of plants |
| title_full | Brassinosteroids participate in the control of basal and acquired freezing tolerance of plants |
| title_fullStr | Brassinosteroids participate in the control of basal and acquired freezing tolerance of plants |
| title_full_unstemmed | Brassinosteroids participate in the control of basal and acquired freezing tolerance of plants |
| title_short | Brassinosteroids participate in the control of basal and acquired freezing tolerance of plants |
| title_sort | brassinosteroids participate in the control of basal and acquired freezing tolerance of plants |
| topic | Brassinosteroid CESTA Cold Responses CBFs CBF1 |
| url | https://eprints.nottingham.ac.uk/38945/ https://eprints.nottingham.ac.uk/38945/ https://eprints.nottingham.ac.uk/38945/ |