Figure 3.

Effect of Fe³⁺ on the regeneration of planarian at different temperatures. (a) Contrast histogram of the number of days after regeneration of the head, trunk, and tail of the planarian at 15°C, under different treatment concentrations and water treatment; (b) similarly, at 20°C, contrast histogram of the number of days after the regeneration of the planarian; (c) similarly, the comparison histogram of the number of days of the regeneration of the planarian at 25°C. Note: ∗∗∗ indicates P < 0.001, ∗∗ indicates P < 0.01 with extremely significant difference, and ∗ indicates P < 0.05 with significant difference.