Ethylene increases the NaHCO stress tolerance of grapevines partially via the VvERF1B-VvMYC2-VvPMA10 pathway.

Here, we evaluated the role of ethylene in regulating the NaHCO stress tolerance of grapevines and clarified the mechanism by which VvERF1B regulates the response to NaHCO stress. The exogenous application of ACC and VvACS3 overexpression in grapevines and grape calli revealed that ethylene increased NaHCO stress tolerance, and this was accompanied by increased plasma membrane H-ATPase (PMA) activity. The expression of VvERF1B was strongly induced by ACC, and overexpression of this gene in grapevines conferred increased NaHCO stress tolerance and enhanced PMA activity and H and oxalate secretion.