Role of fig rootstock on changes of water status and nutrient concentrations in 'Sabz' cultivar under drought stress condition

To investigate the effects of fig rootstocks on scion water and nutrient content under drought stress conditions, 'Sabz' cultivar was budded onto rootstocks of 'Siah', 'Shah Anjir', 'Dehdez', 'Matti' and 'Tousorkh'. Stem water potential (Ψstem), relative water content (RWC), stomatal conductance (gs) and leaf concentration of N (nitrogen), P (phosphorous), K (potassium), Ca (calcium), Zn (zink), and Fe (ferrous) were measured in scion and root growth factors in rootstocks. The results showed that rootstocks altered scion leaf Ψstem, RWC, gs and some mineral concentrations significantly. Plants on 'Shah Anjir' rootstock had the greatest leaf concentrations of N and Zn whereas 'Siah' was the most efficient rootstock in P uptake. Under drought stress, 'Siah' and 'Dehdez' rootstocks transferred more amounts of water to 'Sabz' scion cultivar. Leaf P and K concentrations, gs in the scion leaves and root volume of rootstocks were positively correlated with RWC of scion under drought stress.