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The chemistry of plants represents a taxonomic and phylogenetic value. Researchers have recently used volatile organic compounds ( VOCs ) for taxonomic studies. The present work analysed and determined, for the first time, the usefulness of floral volatile compounds in the taxonomy of two species of   Rhamnus   sect.   Alaternus  , as well as the hybrid between these taxa. The two species show significant quantitative and qualitative differences. The terpenes linalool, ocimene, caryophyllene, and green volatiles are exclusive to    Rh.   alaternus   , while farnesene (terpene), methyl salicylate and methyl benzoate (benzoids) are obtained from    Rh.   ludovici-salvatoris   . Both volatilomes were attractive to   Hymenoptera   pollinators; therefore, these pollinators could serve as the main hybridisation vector. In addition,    Rh.   alaternus    shows greater chemical and genetic heterogeneity than    Rh.   ludovici-salvatoris   . Hybrids between the two species,   Rh.   ×   bermejoi  , are closer in chemical similarity to    Rh.   alaternus    than    Rh.   ludovici-salvatoris   .

﻿Can floral volatile organic compounds contribute to the taxonomy of the Rhamnus sect. Alaternus ?

Can floral volatile organic compounds contribute to the taxonomy of the Rhamnus sect. Alaternus ?