Fig. 4

Transcriptome analyses with gene ontology (GO) enrichment test in differentially expressed genes (DEGs) of pepper under abiotic stress. A For each stress, expression patterns of whole DEGs, including AP2/ERFs are represented in four clusters. B Heat map showing the distribution of AP2/ERF genes in each subgroup. C Dot plot showing the top five GO descriptions abundance in specific clusters. The shape and size of the symbols illustrate the type and frequency of the GO description, respectively