Figure 4.

RipAB down‐regulates the calcium signalling pathway at the transcriptional level. (a) Statistics of KEGG pathway enrichment showing that the Plant–Pathogen Interaction (PPI) pathway was the only significantly enriched pathway. Sixteen genes were enriched in the PPI pathway. (b) The relative expression of nine genes involved in the Ca²⁺ pathway was validated by quantitative reverse transcription‐polymerase chain reaction (qRT‐PCR) in transgenic plants. (c) The relative expression of eight genes involved in the Ca²⁺ pathway was validated by qRT‐PCR in potatoes inoculated with mutant UW551 (ΔripAB) and UW551 strains at 24 h post‐inoculation (hpi).