Three Arabidopsis SnRK2 Protein Kinases, SRK2D/SnRK2.2, SRK2E/SnRK2.6/OST1 and SRK2I/SnRK2.3, Involved in ABA Signaling are Essential for the Control of Seed Development and Dormancy
Japan International Research Center for Agricultural Sciences · RIKEN Center for Sustainable Resource Science · +2 more institutions
Abstract
ABA is an important phytohormone regulating various plant processes, including stress tolerance, seed development and germination. SRK2D/SnRK2.2, SRK2E/SnRK2.6/OST1 and SRK2I/SnRK2.3 are redundant ABA-activated SNF1-related protein kinases 2 (SnRK2s) in Arabidopsis thaliana. We examined the role of these protein kinases in seed development and germination. These SnRK2 proteins were mainly expressed in the nucleus during seed development and germination. The triple mutant (srk2d srk2e srk2i) was sensitive to desiccation and showed severe growth defects during seed development. It exhibited a loss of dormancy and elevated seed ABA content relative to wild-type plants. The severity of these phenotypes was far…
Citation impact
- FWCI
- 45.92
- Percentile
- 100%
- References
- 81
Authors
12- KNKazuo NakashimaCorresponding
Japan International Research Center for Agricultural Sciences
- YFYasunari Fujita
Japan International Research Center for Agricultural Sciences
- NKNorihito Kanamori
Japan International Research Center for Agricultural Sciences
- TKTakeshi Katagiri
RIKEN Center for Sustainable Resource Science
- TUTaishi Umezawa
RIKEN Center for Sustainable Resource Science
Topics & keywords
- Arabidopsis
- Mutant
- Kinase
- Biology
- Cell biology
- Seed dormancy
- Dormancy
- Protein kinase A