ABI5 acts downstream of ABI3 to execute an ABA‐dependent growth arrest during germination
Rockefeller University · Institute of Plant Molecular Biology
Abstract
The development of a germinating embryo into an autotrophic seedling is arrested under conditions of water deficit. This ABA-mediated developmental checkpoint requires the bZIP transcription factor ABI5. Here, we used abi3-1, which is also unable to execute this checkpoint, to investigate the relative role of ABI3 and ABI5 in this process. In wild-type Arabidopsis plants, ABI3 expression and activity parallel those described for ABI5 following stratification. During this process, transcript levels of late embryogenesis genes such as AtEm1 and AtEm6 are also re-induced, which might be responsible for the acquired osmotic tolerance in germinated embryos whose growth is arrested. ABI5 expression is greatly…
Citation impact
- FWCI
- 10.90
- Percentile
- 100%
- References
- 52
Authors
5Topics & keywords
- Germination
- Downstream (manufacturing)
- Cell biology
- Chemistry
- Horticulture
- Biology
- Engineering
- Operations management
- Clean water and sanitation