Characterization of Biosynthetic Pathways for the Production of the Volatile Homoterpenes DMNT and

摘要: Plant volatiles not only have multiple defense functions against herbivores, fungi, and bacteria, but also have been implicated in signaling within the plant and toward other organisms. Elucidating the function of individual plant volatiles will require more knowledge of their biosynthesis and regulation in response to external stimuli. By exploiting the variation of herbivoreinduced volatiles among 26 maize (Zea mays) inbred lines, we conducted a nested association mapping and genome-wide association study (GWAS) to identify a set of quantitative trait loci (QTLs) for investigating the pathways of volatile terpene production. The most significant identified QTL affects the emission of (E)-nerolidol, linalool, and the two homoterpenes (E)-3, 8-dimethyl-1, 4, 7-nonatriene (DMNT) and (E, E)-4, 8, 12-trimethyltrideca-1, 3, 7, 11-tetraene (TMTT). GWAS associated a single nucleotide polymorphism in the promoter of the gene …