RNA-Seq analysis and comparison of the enzymes involved in ionone synthesis of three cultivars of Osmanthus.

To comprehend the molecular mechanisms that control the differences in the composition of Osmanthus essential oils, the RNA-seq data and differentially expressed genes in different cultivar Osmanthus were studied. cDNA libraries of "jinqiugui," "baijie," and "rixianggui" were sequenced using Illumina HiSeq TM 2000. All of the enzymes involved in ionone synthesis were verified. DEGs were revealed and their enriched pathways were analyzed. A total of 20 DEGsencoding four enzymes that were potential candidates involved in ionone biosynthesis, as well as ispH, GPPS, ZDS, and CCD. It provided a way for Osmanthus oil monomer material to be synthesized in vitro.