Farm or lab? Chamazulene content of Artemisia arborescens (Vill.) L. essential oil and callus volatile metabolites isolate

•Tree Wormwood is a promising source for chamazulene.•In vitro culture is an alternative for the commercial production of phytochemicals.•Plant growth regulators conditions the production of chamazulene versus β-thujone.•Callogenesis exhibited positive effects on chamazulene biosynthesis.