Low variability of flower volatiles of Rosa damascena Mill. plants from rose plantations along the Rose Valley, Bulgaria

The composition of volatile compounds in the rose essential oils obtained from the rose flowers has been known to be affected by a number of factors including the region of rose growing. The variations of the flower volatile composition of Rosa damascena plants growing in 11 different rose plantations along the famous Rose Valley in Bulgaria were studied following GC/MS metabolite profiling. ANOVA statistical test revealed that only 14 of a total of 90 identified compounds were significantly influenced by the geographic location of the sampled rose plantation. The hierarchical clustering analysis based on the subset of these 14 compounds revealed no clear correlation between the levels of rose flower volatiles and geographic location of the studied rose plantations. The results from the study suggest low variability of rose flower volatiles accumulation and elevated plasticity of the common R. damascena genotype industrially cultivated in the Rose Valley.

► Flower volatile composition of Rosa damascena plants from 11 different rose plantations from the Rose Valley of Bulgaria was analysed. ► 14 of a total of 90 compounds vary significantly among the rose plantations. ► Hierarchical clustering revealed no clear correlation between flower volatiles levels and geographic location of the plantations. ► Low variability and elevated plasticity of the common R. damascena genotype industrially cultivated in the Rose Valley of Bulgaria.