Fig. 3

Variations in the photosynthetic pigment content of different grades of P. yunnanensis seedlings. (A) Chlorophyll a content, (B) Chlorophyll b content, (C) Total chlorophyll, (D) Carotenoid content, (E) Chlorophyll a/b, and (F) Carotenoid/Chlorophyll. Each dot represents the actual data point for each sample, with black lines connecting the average values of each grade. Different lowercase letters indicate significant differences between grades at the same time point (p < 0.05).