we speculate that it is this disturbance in relative concentrations of cytoplasmic phosphates ( which we show are normally tightly regulated ) that is responsible for both the greater rate of uptake of pi by vacuoles of excised maize root tips , and the previously documented stimulation of pi translocation from root to shoot in whole maize plants exposed to salt and pi .
C0010834
cytoplasmic
C0042219
vacuoles