Fig. 4

Gene expression profiles of coral host and Symbiodiniaceae during early heat stress. A Venn diagram of the number of differentially expressed genes (DEGs) in corals exposed to low (< 1 DHW; T2) or moderate (3 DHW; T4) stress compared to ambient conditions determined by voom-limma analyses. B Multilevel sPLS-DA for host and Symbiodiniaceae gene profiles; samples between treatment conditions are discriminated along component 1. C Heat map illustrating the top discriminative genes between ambient, low, and moderate stress, identified along with component 1 of multilevel sPLS-DA analysis for host (n = 4 genes) and Symbiodiniaceae (n = 142 genes)