Gene ontology (GO) annotation of differentially expressed genes (DEGs) assigned to the biological process (BP) category after cold treatment and recovery in shoots.

The bars show the numbers of genes in each GO Slim category. GO enrichment analysis was conducted using agriGO (http://bioinfo.cau.edu.cn/agriGO/), and GO terms with a p < 0.05 were considered to have significantly enriched expression in the cluster.