SlWRKY2 orchestrates cold tolerance via phytochromes interaction and SlPIF4 stabilization in tomato - PubMed
3 hours ago
- #transcription factor
- #cold tolerance
- #light signaling
- The transcription factor SlWRKY2 links phytochrome-mediated light perception with cold stress adaptation in tomato.
- Under cold stress, low red/far-red light ratios induce SlWRKY2 expression, with phytochrome B (SlphyB) repressing and phytochrome A (SlphyA) promoting this process.
- SlWRKY2 physically interacts with SlphyB1 and SlphyA, and both cold and light signals promote the formation of SlWRKY2 condensates via liquid-liquid phase separation (LLPS).
- SlWRKY2 directly interacts with and stabilizes SlPIF4, activates its transcription, and they work synergistically to enhance SlCBFs expression for cold tolerance.
- SlWRKY2 competes with SlphyB1 for interaction with SlPIF4, forming the SlphyB1/A-SlWRKY2-SlPIF4 module crucial for light quality-dependent cold adaptation.