Intra- and inter-specific variation of turpentine composition in Eldar pine (Pinus eldarica Medw.) and black pine (Pinus nigra Arnold)

► We examined the terpene profiles among the populations of two pine species: Pinus eldarica Medw. and Pinus nigra Arnold. ► The two species did not differ qualitatively; however, there were significant differences in their quantitative terpene profiles. ► In P. nigra, the major constituent of the turpentine was α-pinene. ► In the turpentine of P. eldarica, α-pinene and 3-carene were the major components in both populations.