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. 2026 Jun 29;17:1873808. doi: 10.3389/fpls.2026.1873808

Figure 4.

Panel A shows a clustered heatmap of sample correlations with color gradients from blue to red. Panel B is a PCA scatter plot distinguishing genotypes and rhizome sections using colored symbols. Panel C presents a three-set Venn diagram with overlapping and unique gene counts for each comparison group. Panel D depicts a volcano plot with log2 fold change and significance for gene expression between groups, highlighting 21 genes in the center. Panel E displays a dot plot of metabolic pathway enrichment, where dot size indicates gene count and color reflects p-values for multiple comparisons.

Transcriptome profiles of rhizome tissues in R. crenulata (RC), R. fastigiata (RF), and intergrades (RH). (A) Hierarchical clustering heatmap showing the correlation among samples. (B) Principal component analysis (PCA) of transcriptome profiles. (C) Venn diagram showing the shared and unique DEGs between R. crenulata and R. fastigiata. (D) Dual volcano plot showing DEGs in the rhizome middle region among R. crenulata, intergrades, and R. fastigiata. (E) KEGG pathway enrichment analysis of DEGs across different pairwise comparisons.