3. Results3.1. Effects of BPA on th

3. Results3.1. Effects of BPA on the contents of mineral elements (P, K, Ca, and Mg) in soybean roots at different growth stagesFig. 1 shows the effects of BPA on P, K, Ca, and Mg contents in soybean roots at different growth stages. In the control roots, the P contents at the seed-filling stage and the flowering and podding stage were significantly higher than those at the seedling stage. After BPA exposure, the P contents in soybean roots at the seedling stage and the flowering and podding stage initially increased and then decreased compared with in the control. The P content in the soybean roots at the seed-filling stage increased as the dose of BPA increased. When BPA dose increased to 6.0 mg/L and 12.0 mg/L, the P content increased by 58.70% and 77.20%, respectively, compared with the control.

3. Results.3.1. Effects of BPA on the contents of mineral elements (,,, P K Ca and Mg) in soybean roots at different growth stages.Fig. 1 shows the effects of BPA on P K Ca and Mg,,, contents in soybean roots at different growth stages. In the control. Roots the P, contents at the seed-filling stage and the flowering and podding stage were significantly higher than those. At the seedling stage. After BPA exposure the P, contents in soybean roots at the seedling stage and the flowering and podding. Stage initially increased and then decreased compared with in the control. The P content in the soybean roots at the seed-filling. Stage increased as the dose of BPA increased. When BPA dose increased to 6.0 mg / L and 12.0 mg / L the P, content increased. By 58.70%, and 77.20% respectively compared with, the control.