Fig. 4

Ventricular myocytes (VMs) and atrial myocytes (AMs) exhibited distinct regulatory patterns in energy metabolism pathways under heat stress. A KEGG enrichment analysis of DEGs in VMs and AMs. B Predicted diagram of the energy metabolism pathway in VMs and AMs, including glycolysis, TCA cycle, and (C) oxidative phosphorylation process. The black bolded fonts indicate the key enzyme in the process and the yellow bolded fonts represent the genes displayed significant expression changes under heat stress. The size and color of bubble illustrate the significance and regulatory trend of pathway genes, respectively