Infraspecific Variability of Juniperus L. (Cupressaceae) Based on Monoterpenoid Compositions

摘要

The compositions of leaf monoterpenoids from 11 species in the Juniperus section (Juniperus chinensis var. chinensis, J. virginiana, J. communis var. montana, J. rigida, J. chinensis var. globosa, J. chinensis var. sargentii, J. chinensis 'Kaizuka Variegata', J. squamata 'Wilsonii', J. x media 'Shimpake', J. x media 'Plamosa Aurea', and J. squamata 'Alqderi') were comparatively analyzed by GC-MS. Of the 24 compounds identified, a-pinene, myrcene, limonene, terpinolene, and bornyl acetate were commonto all, but particular combinations differed remarkably among taxa. The simplest composition (eight compounds) was found mj. chinensis var. chinensis; the most complex (19 compounds), in J. x media 'Shimpake'. Cluster analysis generated four distinctiveclades within the Juniperus section. The minimum spanning network revealed that J. squamata 'Wilsonii' and J. x media 'Shimpake' were most similar in their chemical makeup.