Pathways enrichment statistical scatter plot of differential expression genes (DEGs) between (A) WS vs. AE, (B) SE vs. WS, (C) SS vs. SE, (D) AE vs. SS. The vertical axis represents the name of pathway; the horizontal axis represents the pathways corresponding rich factor. The gene ratio refers to the ratio of the number of DEG enriched in the pathway and the number of all annotated genes in the pathway. Higher gene ratio indicates greater degrees of enrichment. The 20 pathways with the most significant enrichment were displayed in figure. Abbreviations: AE, autumn equinox; SE, spring equinox; SS, summer solstice; WS, winter solstice.