“…The treatment of A. crassna with methyl jasmonate (MJ) was found by Kumeta and Ito [ 45 ] to promote the expression of the δ -guaiac synthase gene, leading to the induction of α -guaiene, α -humulene, and δ -guaiene production. Additionally, a series of studies [ 4 , 34 , 45 , 46 , 47 , 48 , 49 ] have demonstrated that physical or chemical trauma, such as mechanical injury, exposure to marijuana (MJ), or treatment with formic acid (FA), can induce the expression of FPS-related genes. This suggests a clear association between tissue injury and sesquiterpenoid synthesis at the level of gene expression.…”