Rapid effect of an elicitor on uptake and intracellular distribution of phosphate in cultured parsley cells

Cell suspension cultures of parsley (Petroselinum hortense) grown in synthetic medium take up most of the inorganic phosphate supplied with the medium within the initial 5 days after transfer. Nuclear magnetic resonance spectra of intact parsley cells from this growth stage revealed that approximately half of the phosphate was located within the vacuoles, whereas after 7 days of growth phosphate content of the vacuoles was relatively low. At both times, addition of an elicitor preparation from Alternaria carthami, which is not toxic to the cells, led to a temporary increase of vacuolar phosphate at the expense of cytoplasmic phosphate, even when excess phosphate was added to the medium. The rapid decrease of cytoplasmic phosphate might play a role in the redirection of phenylpropanoid metabolism reported for elicitor-treated parsley cells.