An integrated genomics approach to identifying floral scent genes in rose

The ability of flowering plants to prosper throughout their long evolution has always been strongly dependent on the constant development of strategies to lure pollinators. This has led to the creation of elaborate perianth forms, splendid color patterns, and a broad spectrum of fragrances. Flower morphogenesis and pigmentation have been intensively studied in the past several decades and today the results of our deepened understanding of the underlying pathways have been harnessed for the improvement of such characters in some commercially important ornamentals.1-3 In contrast, our knowledge of the biochemistry of fragrance production and of the mechanisms regulating its emission remain sketchy. This is due in part to the invisibility of scent as a character, to the shortcomings of humans’ sense of smell, and to the highly variable nature of the trait (because of strong environmental influences, among other reasons). To date, no simple, efficient, and reliable methods of screening for genetic variation have been developed. Moreover, no convenient plant model systems that would enable biochemical or forward and reverse genetic studies of flower scent are available.