Rootstocks of different genotypes have varying hydraulic conductance. Rootstock’s hydraulic conductivity will influence a scion’s water relations. Rootstocks influence a scion’s hydraulic conductance through its root system size and vigor, hydraulic signaling, and direct signaling. Dwarfing and drought tolerance are the two impacts of a rootstock’s hydraulic conductance on grafted trees. Grafting scions to rootstocks… Continue reading…