Details
- Autor(en) / Beteiligte
- Titel
- Mg-chelatase H subunit is an abscisic acid receptor
- Ist Teil von
- Nature, 2006-10, Vol.443 (7113), p.823-826
- Ort / Verlag
- London: Nature Publishing
- Erscheinungsjahr
- 2006
- Quelle
- Psychology & Behavioral Sciences Collection
- Beschreibungen/Notizen
- Abscisic acid (ABA) is a vital phytohormone that regulates mainly stomatal aperture and seed development, but ABA receptors involved in these processes have yet to be determined. We previously identified from broad bean an ABA-binding protein (ABAR) potentially involved in stomatal signalling, the gene for which encodes the H subunit of Mg-chelatase (CHLH), which is a key component in both chlorophyll biosynthesis and plastid-to-nucleus signalling. Here we show that Arabidopsis ABAR/CHLH specifically binds ABA, and mediates ABA signalling as a positive regulator in seed germination, post-germination growth and stomatal movement, showing that ABAR/CHLH is an ABA receptor. We show also that ABAR/CHLH is a ubiquitous protein expressed in both green and non-green tissues, indicating that it might be able to perceive the ABA signal at the whole-plant level.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 0028-0836eISSN: 1476-4687, 1476-4679DOI: 10.1038/nature05176Titel-ID: cdi_proquest_miscellaneous_68970571
- Format
- –
- Schlagworte
- abscisic acid, Abscisic Acid - metabolism, Arabidopsis, Arabidopsis - enzymology, Arabidopsis - genetics, Arabidopsis - metabolism, Arabidopsis Proteins - chemistry, Arabidopsis Proteins - genetics, Arabidopsis Proteins - metabolism, Arabidopsis thaliana, binding capacity, Biological and medical sciences, Biosynthesis, Botany, Chlorophyll, Fundamental and applied biological sciences. Psychology, Gene Expression Regulation, Plant, Genetics, Growth regulators, Hormones, Lyases - chemistry, Lyases - genetics, Lyases - metabolism, magnesium chelatase, Metabolism, Molecular Sequence Data, plant growth, Plant physiology and development, Plants, Genetically Modified, Protein Binding, protein subunits, Protein Subunits - genetics, Protein Subunits - metabolism, Proteins, receptors, Seed germination, seedling growth, Signal Transduction, stomatal movement, Substrate Specificity