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Decreased Pi uptake in WRKY75 RNAi plants during Pi starvation. Wild-type plants (black circles) and WRKY75 RNAi plants (white squares) were grown on 0.5× MS medium for 7 d and then transferred as groups of 10 seedlings into Pi-sufficient or Pi-deficient medium for 3 d. The Pi uptake of these 10-d-old seedlings was monitored over a 2-h period. A, Pi uptake in plants from Pi-sufficient conditions. B, Pi uptake in plants from Pi-deficient conditions. Error bars represent se (n = 3).
