Arabidopsis leaf hydraulic conductance is regulated by xylem sap pH, controlled, in turn, by a P-type H(+) -ATPase of vascular bundle sheath cells.
Grunwald Y, Wigoda N, Sade N, Yaaran A, Torne T, Gosa SC, Moran N, Moshelion M. Plant J. 2021 Apr; 106(2):301-313. Epub 2021 Apr 17.