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Role of OsFRDL1 in Al stress. A, Al-induced citrate secretion. Seedlings of wild-type rice (WT) and a knockout line (ND) were exposed to 0.5 mm CaCl2 (pH4.5) solution containing 50 μm AlCl3. Root exudates were collected for 24 h after Al treatment. Citrate was determined by an enzymatic method. B, Effect of Al on the expression of OsFRDL1 in rice root. The roots were exposed to 50 μm AlCl3 for 3 h. Data as means ± sd (n = 3).
