Fig. 2

Preliminary analysis of metabolome data. A PCA score plot of mass spectrometry data for each sample. The sampling groups are color coded as follows: green = S1; orange = S2; purple = S3. B Heatmap of DAMs’ contents in carotenoid biosynthesis pathway at 3 stages. The horizontal axis represents nine sets of experimental samples with three biological replicates for each of the three periods, and the vertical axis represents 14 metabolites annotated to ko00906. The more gray the color, the lower the content; the more red the color, the higher the content