3.5.8. Changes in IAA/ABA Ratio

As presented in Figure 4H, the IAA/ABA ratio of both treatment and control groups exhibited a decreasing trend in the early stage, followed by an increasing trend. Compared with the treatment groups with 200 and 1000 mg·L−<sup>1</sup> ABT-1 and the control group, ABT-1—500 mg·L−<sup>1</sup> had a higher IAA/ABA ratio throughout the rooting process, while the control group possessed a consistently lower IAA/ABA ratio. This suggests that auxin can enhance the rooting ability of cuttings, and that IAA and ABA can act together, thereby regulating the development and growth of the root system of cuttings.
