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AtPT2::GUS expression pattern under Pi depletion. Arabidopsis AtPT2::GUS seedlings were grown hydroponically for 12 days under sufficient Pi level (125 μM Pi) and then transferred to Pi-depleted liquid media or control media (125 μM Pi, mock). GUS activity in leaves and root was monitored by histochemical analyses at different time points. GUS expression in the mock condition is shown for the last time sampled (48 h).
