Stop and smell the grasses: evolution of scent producing genus Cymbopogon

Cymbopogon spp. are grass species widely used around the world as medicinal plants and in various industries for the production of perfumes and pharmaceuticals. Despite their extensive use, there are relatively few studies at the genomic and transcriptomic levels. In this study, transcriptomic data were generated for two species—Cymbopogon flexuosus and Cymbopogon winterianus—to investigate evolutionary aspects and the expression of genes associated with secondary metabolite biosynthesis. The transcriptome assembly revealed a total of 18,286 and 22,458 transcripts for C. flexuosus and C. winterianus, respectively. Furthermore, the reads were mapped against the genomes of related species, including Andropogon gerardii, Sorghum bicolor, Saccharum officinarum, Miscanthus sinensis, Miscanthus lutarioriparius, and Zea mays, to assess their conservation across these genomes. The results indicated which species are more closely related to the Cymbopogon genus and highlighted key differences in metabolic pathways. Overall design: Two samples of leaves per species (cf1, cf2, cw1, and cw2) were used to extract total RNA and to perform sequencing.