Journal of experimental botany, 2012-01, Vol.63 (2), p.1013-1024
2012
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- Autor(en) / Beteiligte
- Titel
- A rice orthologue of the ABA receptor, OsPYL/RCAR5, is a positive regulator of the ABA signal transduction pathway in seed germination and early seedling growth
- Ist Teil von
- Journal of experimental botany, 2012-01, Vol.63 (2), p.1013-1024
- Ort / Verlag
- Oxford: Oxford University Press
- Erscheinungsjahr
- 2012
- Quelle
- MEDLINE
- Beschreibungen/Notizen
- Abscisic acid (ABA) is a phytohormone that positively regulates seed dormancy and stress tolerance. PYL/RCARs were identified an intracellular ABA receptors regulating ABA-dependent gene expression inArabidopsis thaliana. However, their function in monocot species has not been characterized yet. Herein, it is demonstrated that PYL/RCAR orthologues inOryza sativafunction as a positive regulator of the ABA signal transduction pathway. Transgenic rice plants expressing OsPYL/RCAR5, a PYL/RCAR orthologue of rice, were found to be hypersensitive to ABA during seed germination and early seedling growth. A rice ABA signalling unit composed of OsPYL/RCAR5, OsPP2C30, SAPK2, and OREB1 for ABA-dependent gene regulation was further identified, via interaction assays and a transient gene expression assay. Thus, a core signalling unit for ABA-responsive gene expression modulating seed germination and early seedling growth in rice has been unravelled. This study provides substantial contributions toward understanding the ABA signal transduction pathway in rice.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 0022-0957eISSN: 1460-2431DOI: 10.1093/jxb/err338Titel-ID: cdi_proquest_miscellaneous_915633081
- Format
- –
- Schlagworte
- Abscisic Acid - metabolism, Abscisic Acid - pharmacology, Arabidopsis - genetics, Arabidopsis - metabolism, Biological and medical sciences, Cell Nucleus - metabolism, Fundamental and applied biological sciences. Psychology, Gene expression, Gene expression regulation, Gene Expression Regulation, Plant - physiology, Germination, Germination - physiology, Models, Biological, Nicotiana - genetics, Nicotiana - metabolism, Nicotiana - ultrastructure, Oryza - genetics, Oryza - growth & development, Oryza - metabolism, Oryza - physiology, Phenotype, Phosphatases, Plant Dormancy - physiology, Plant Growth Regulators - metabolism, Plant Growth Regulators - pharmacology, Plant Leaves - genetics, Plant Leaves - growth & development, Plant Leaves - metabolism, Plant Leaves - physiology, Plant physiology and development, Plant Proteins - genetics, Plant Proteins - metabolism, Plants, Plants, Genetically Modified, Protoplasts, Receptors, RESEARCH PAPER, Rice, Saccharomyces cerevisiae - genetics, Saccharomyces cerevisiae - metabolism, Saccharomyces cerevisiae - ultrastructure, Seedlings - genetics, Seedlings - growth & development, Seedlings - metabolism, Seedlings - physiology, Seeds - genetics, Seeds - growth & development, Seeds - metabolism, Seeds - physiology, Signal transduction, Signal Transduction - physiology, Transgenic plants, Two-Hybrid System Techniques