Figure 1.

Effects of different concentrations of Al³⁺ on the morphological characteristics of peanut and the expression of AhALMT9 and AhFRDL1 genes. Plant height was measured for 14 days of Al treatment (A). Effect of different concentrations of Al on peanut plant height (B). qRT-PCR analysis of relative transcription levels of AhALMT9 (C) and AhFRDL1 (D). Al0, Al1, Al2 and Al3 represent 0 (pH 6.85), 1.25 (pH 4.03), 2.5 (pH 3.85) and 5 (pH 3.69) mmol/L AlCl₃.18H₂O solutions, respectively. Data are means (±SE), n = 3. Marking the same letters means p ≥ 0.05 (LSD), there is no significant difference, the difference between different letters means p < 0.05 (LSD), and the difference is significant.