Figure 4. Expression of H3K27me3 Target Genes in the Endosperm.

A) Expression level of shared (green) and endosperm-specific (orange) H3K27me3 target genes compared to all genes (black) in the peripheral endosperm of seeds containing globular stage embryos. B) Box plot of H3K27me3 MAT scores of shared (green) and endosperm-specific (orange) target genes. H3K27me3 MAT scores of endosperm-specific target genes with low expression levels (log₂<4.2) and moderate expression levels in the endosperm (log₂>4.2) are symbolized by striped and dotted fill patterns, respectively. C) Cluster analysis of endosperm-specific H3K27me3 target genes. H3K27me3 target genes are grouped into five mutually exclusive clusters based on their expression patterns. Each row represents a gene, and each column represents a tissue type. Tissue types are: seedlings, leaves, stems, roots, flowers, siliques containing seeds with embryos in the heart or torpedo stage, seeds with embryos in the torpedo, walking stick, curled cotyledon, early green, and green cotyledon stage and endosperm derived from seeds with embryos in the preglobular, globular and heart stage. Red or green indicate tissues in which a particular gene is highly expressed or repressed, respectively.