Additional files [RJEE Vol. 10 (4). 2025 – 4]

• Fig. 1. Impact of acetylcholine (Ach, A) and histamine (His, B) on the pigment content in C. vulgaris cells. Kruskal-Wallis test results indicate that all differences between control and experimental data are significant
• Fig. 2. Impact of serotonin (5-HT, A) and dopamine (DA, B) on the pigment content in C. vulgaris cells. Kruskal-Wallis test results indicate that all differences between control and experimental data are significant, except the carotenoid data (B)
• Fig. 3. Impact of norepinephrine (NE) on the pigment content in C. vulgaris cells. Kruskal-Wallis test results indicate that all differences between control and experimental data are significant