Uncovering the role of ABI2 as a key regulator of flowering time in Arabidopsis
Akhtar Ali, Shah Zareen, Junghoon Park, Dae-Jin Yun · 2026
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Description
Akhtar Ali and colleagues pin down how a stress-hormone protein times flowering in Arabidopsis, the model plant. Their study appeared in Plant Signaling and Behavior in 2026. Abscisic acid, the drought hormone, also delays the switch to flowering, but the wiring was murky. The team focused on ABI2, a core signaling protein earlier reported to promote flowering, and compared normal plants with an abi2 mutant across the flowering gene network.
In the mutant, the floral repressors FLC and CDF1 were strongly switched on. The promoters of flowering were turned down, the mark of delayed bloom. The mutant also carried more of the ABI5 protein, in a more active state. Genetic tests placed ABI2 upstream, acting as a brake on ABI5. The authors cast ABI2 as a fine-tuning switch where drought signaling meets the flowering clock. Such switches interest breeders weighing yield against climate stress.
Catalog record
| CREATOR | Akhtar Ali, Shah Zareen, Junghoon Park, Dae-Jin Yun |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 14 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |