Fig. 4
The effect of different concentrations of SA on carotenoid content (A), astaxanthin content (B) and astaxanthin yield (C) in C. zofingiensis. Each experiment was carried out using three biological replicates, and the results are shown as mean ± SD. The statistical significance of the data was evaluated using a two-way repeated measures ANOVA; * denotes significant difference from the control group (p ≤ 0.05); ** indicate significant difference from the control group (p ≤ 0.01); *** signifies significant difference from the control group (p ≤ 0.001); ****represents significant difference from the control group (p ≤ 0.0001)