In the incompatible interaction, a drastic induction of the CACYP1 mRNA occurred in the bacteria inoculated leaves compared to that of the compatible interaction.
Prior inoculation with an avirulent strain of X. campestris pv. vesicatoria in lower leaves resulted in a strong, systemic CACYP1 mRNA accumulation in the uninoculated upper leaves.
In situ hybridization results revealed that CACYP1 mRNA was localized in the phloem cells of vascular tissues in pepper fruits infected by C. gloeosporioides.
Treatment with salicyclic acid and methyl jasmonate strongly induced the CACYP1 transcripts in pepper leaves.