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Fig. 7 | BMC Genomics

Fig. 7

From: Time-resolved pathogenic gene expression analysis of the plant pathogen Xanthomonas oryzae pv. oryzae

Fig. 7

a Continuous time-resolved heat map of representative putative pathogenicity-related genes. Upregulated genes are shown in yellow and downregulated genes are shown in blue. Continuous gene expression levels are proposed by non-linear regression data fitting using RNA-Seq data from seven different time points. Details are shown in Additional file 16: Figure S8. b Schematic model of the pathogenicity signaling pathways in Xoo. Plant pathogenic signals activate unknown receptor proteins, which relay the pathogenic signal to the global regulators such as HrpG. Activated HrpG delivers the signal to HrpX, which activates a large set of virulence genes such as T3SS and T3SS effectors (green). HrpX activates T2SS substrate gene expression (orange). Activated HrpG suppresses flagella biosynthesis- and chemotaxis-related genes (purple) and GGDEF domain-containing proteins (light blue) by which the synthesized cyclic-di-GMP binds to Clp (cyan) and abolishes the DNA binding of Clp. Two-component systems (salmon) are upregulated by the pathogenicity signal. Sugar-uptake genes (grey) such as rpfN and fructose-specific phosphotransferase system genes are also upregulated. In the early pathogenicity signal, iron-uptake genes (light orange) such as the TonB-dependent receptor, TonB, ExbB, ExbD and ferric citrate transporter genes are upregulated. Black arrows indicate activation signals and blocked blue lines indicate repression signals. The time of gene expression at transcription level is labeled for each pathway in red letters

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