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Figure 4 | BMC Genomics

Figure 4

From: RNA-seq analysis identifies an intricate regulatory network controlling cluster root development in white lupin

Figure 4

Hierarchical clustering of genes differentially expressed across developmental stages of cluster root. A) Hierarchical cluster analysis gave five main clusters for the 747 contigs showing differential expression in at least one pair-wise comparison of the three analysed cluster root tissues. B) Average expression pattern of contigs in the main five clusters (Given are means ± SD). Known P-deficiency responsive genes within each cluster are also indicated. Cluster 1 contained genes with highest expression in the root tip of the cluster root and decreasing towards the mature part. GO term analysis identified that this cluster was enriched for genes with functions in cell cycle regulation and auxin-mediated growth control. By contrast, genes in Cluster 2 and 3 showed the opposite expression pattern and are involved in iron homeostasis and oxidative stress response. In comparison, Clusters 4 and 5 only had few genes without any GO term enrichment. For contigs the name of the identified homologous Arabidopsis genes are given. Gene abbreviations are: 2OG/Fe-OX, 2-OXOGLUTARATE AND FE(II)-DEPENDENT OXYGENASE; ABP, AUXIN BINDING PROTEIN; ACO, 1-AMINOCYCLOPROPANE-1-CARBOXYLATE OXIDASE; ARF, AUXIN RESPONSE FACTOR; CYC, CYCLIN; CDK, CYCLIN-DEPENDENT KINASE; FER, GAP-DH, GLYCEROALDEHYDE DEHYDROGENASE; GAST, GIBERELLIC ACID STIMULATED TRANSCRIPT; HKT, HIGH AFFINITY K+TRANSPORTER; IAA, INDOLE ACETIC ACID-INDUCIBLE; IAMT, IAA CARBOXYLMETHYLTRANSFERASE; LAX, LIKE AUX1; MLS, MALATE SYNTHASE; NPH, NON PHOTOTROPIC HYPOCOTYL; PEPC, PHOSPHOENOL PYRUVATE CARBOXYLASE; PHT, PHOSPHATE TRANSPORTER; PIN, PIN-FORMED; RHS, ROOT HAIR SPECIFIC; SAUR, SMALL AUXIN UP-REGULATED RNA; VIT, VACUOLAR IRON TRANSPORTER; WAT, WALLS ARE THIN; YUC, YUCCA.

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