The CPK8-AHA1 phosphorylation module dampens plasma membrane H+-ATPase activity to confer drought tolerance - PubMed
5 days ago
- #plant biology
- #phosphorylation
- #drought tolerance
- The CPK8-AHA1 phosphorylation module inhibits plasma membrane H+-ATPase activity to enhance drought tolerance.
- CPK8 phosphorylates AHA1 at Ser-899, reducing H+-ATPase activity and promoting stomatal closure under drought.
- CPK8 overexpression reduces water loss and increases leaf temperature in the ost2-2D mutant.
- Drought-induced Ca2+ signals activate CPK8, which modulates PM H+-ATPase activity to optimize plant drought tolerance.