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Decreased phosphatase activity in WRKY75 RNAi plants. Total acid phosphatase activity in leaves (white bars) and roots (black bars) of wild-type and WRKY75 RNAi plants grown hydroponically with Pi (P+: 250 μm) and without Pi (P−) for 7 d. Error bars indicate se (n = 4), and different letters above the bars represent means that are statistically different (P < 0.05).
