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The effect of low pH stress on root elongation and VuFDH expression in rice bean. A, Relative root elongation. Seedlings were grown in nutrient solution with different pH values for 12 h. Root elongation was measured with a ruler before and after treatment (n = 12). B, VuFDH expression. After treatments, root tips (0–1 cm) were excised for RNA extraction and qRT-PCR analysis of VuFDH expression (n = 3). Different letters indicate significant differences between treatments.
