Résumé
A cDNA encoding a bHLH transcription factor was isolated by the yeast one‐hybrid system from a Catharanthus roseus cDNA library using the G‐box element of the Strictosidine synthase gene promoter as bait. The corresponding protein (named CrMYC1) was shown to bind specifically to the G‐box in yeast. In C. roseus suspension cells CrMYC1 mRNA levels are induced by fungal elicitor and jasmonate suggesting that CrMYC1 may be involved in the regulation of gene expression in response to these signals.