Arabidopsis miR156 regulates tolerance to recurring environmental stress through SPL transcription factors
- Plants are sessile organisms that gauge stressful conditions to ensure survival and reproductive success. While plants in nature often encounter chronic or recurring stressful conditions, the strategies to cope with those are poorly understood. Here, we demonstrate the involvement of ARGONAUTE1 and the microRNA pathway in the adaptation to recurring heat stress (HS memory) at the physiological and molecular level. We show that miR156 isoforms are highly induced after HS and are functionally important for HS memory. miR156 promotes sustained expression of HS-responsive genes and is critical only after HS, demonstrating that the effects of modulating miR156 on HS memory do not reflect preexisting developmental alterations. miR156 targets SPL transcription factor genes that are master regulators of developmental transitions. SPL genes are posttranscriptionally downregulated by miR156 after HS, and this is critical for HS memory. Altogether, the miR156-SPL module mediates the response to recurring HS in Arabidopsis thaliana and thus mayPlants are sessile organisms that gauge stressful conditions to ensure survival and reproductive success. While plants in nature often encounter chronic or recurring stressful conditions, the strategies to cope with those are poorly understood. Here, we demonstrate the involvement of ARGONAUTE1 and the microRNA pathway in the adaptation to recurring heat stress (HS memory) at the physiological and molecular level. We show that miR156 isoforms are highly induced after HS and are functionally important for HS memory. miR156 promotes sustained expression of HS-responsive genes and is critical only after HS, demonstrating that the effects of modulating miR156 on HS memory do not reflect preexisting developmental alterations. miR156 targets SPL transcription factor genes that are master regulators of developmental transitions. SPL genes are posttranscriptionally downregulated by miR156 after HS, and this is critical for HS memory. Altogether, the miR156-SPL module mediates the response to recurring HS in Arabidopsis thaliana and thus may serve to integrate stress responses with development.…
Verfasserangaben: | Anna Stief, Simone Altmann, Karen Hoffmann, Bikram Datt Pant, Wolf-Rüdiger Scheible, Isabel BäurleORCiDGND |
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DOI: | https://doi.org/10.1105/tpc.114.123851 |
ISSN: | 1040-4651 |
ISSN: | 1532-298X |
Titel des übergeordneten Werks (Englisch): | The plant cell |
Verlag: | American Society of Plant Physiologists |
Verlagsort: | Rockville |
Publikationstyp: | Wissenschaftlicher Artikel |
Sprache: | Englisch |
Jahr der Erstveröffentlichung: | 2014 |
Erscheinungsjahr: | 2014 |
Datum der Freischaltung: | 27.03.2017 |
Band: | 26 |
Ausgabe: | 4 |
Seitenanzahl: | 16 |
Erste Seite: | 1792 |
Letzte Seite: | 1807 |
Fördernde Institution: | Royal Society University Research Fellowship; Sofja-Kovalevskaja-Award (Alexander-von-Humboldt-Foundation); CRC 973 Project (Deutsche Forschungsgemeinschaft) [A02]; John Innes Centre, Norwich, UK |
Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Biochemie und Biologie |
Peer Review: | Referiert |