Figure 4
The ubiquitin dependent degradation system in Ponkan mandarin 1 day after infection with X. fastidiosa . Activation of the auxin pathway in Ponkan mandarin after infection with the bacteria. Signaling of this hormone happens when, at high auxin concentrations, the transcription factor Aux /IAA9 is sent to ubiquitin dependent degradation, which leads to degradation of this factor, allowing the release of auxin responsive factors (ARFs) from the complex. Log2 fold change of gene expression (X. fastidiosa versus mock-inoculated control) was analyzed by MapMan. Blue squares represent upregulated genes, red squares represent downregulated genes and grey circles represent not differentially regulated genes. The color saturation indicates fold change >0.8 and < -0.8. Aux /IAA9, transcription factor Auxin/Indole-3 acetic acid 9; DUB, Deubiquitinating enzyme; E1, Ubiquitin-activating enzymes; UBA1, ubiquitin-activating enzyme E1; E2, Ubiquitin-conjugating enzymes; UBC2, ubiquitin-conjugating enzyme E2; RING, C3HC4 RING-domain-containing ubiquitin E3 ligase; HECT, HECT type E3; APC, anaphase-promoting complex; E3, Ubiquitin ligases; Cullin, SKP, FBOX and RBX, subunit of the E3 ligase; ARF, auxin responsive factors.