Bleeding rate as a function of leaf osmotic potential in the drought stress (A, B) and well-watered (C, D) treatments in which sap was collected at three times per day. (A) and (C) show the drought-tolerant varieties and (B) and (D) show the drought-susceptible varieties. Values shown are from 2013WS (82 DAS), 2014DS (78 and 92 DAS) and 2015DS (84 DAS).