Chemical Characterization of the Essential Oils of Eucalyptus.grandis×Eucalyptus.urophylla Hybrids and Six Pure Eucalyptus species Grown in Guangxi (China)

Hydrodistillation of the fresh leaves of E.grandis×E.urophylla hybrids and pure species E.grandis, E.urophylla, E.pellita, E.camaldulensis, E. dunni, and E.saligna collected from the trees grown in Guangxi Huangmian Forest (China), afforded essential oils in yields varying from 0.24±0.15% to 5.36±0.28%, according to the species. Analysis by GC (FID) and GC/MS allowed the identification of 67 compounds, representing 82.55% to 91.03% of the total oil composition. The dominant compounds were 1,8-cineole in E.saligna, E.urophylla, E.grandis×E.urophylla, E.grandis, E.pellita and E. dunni (67.48, 57.12, 48.21, 23.64, 20.34, 20.22%), p-Cymene in E.camaldulensis,E. dunni and E.grandis(21.32, 14.74, 13.38%), α-pinene in E.grandis and E.grandis×E.urophylla (21.77, 15.55%), α-terpinene in E. dunni and E.grandis (17.96, 9.35%), α-terpineol in E.pellita and E.saligna (19.24,11.54%), respectively. Hierarchical Cluster Analysis separated the characterized essential oils into two groups, each constituting a chemotype. E.grandis×E.urophylla and E.urophylla were classified in the same group, while E.grandis in the other.

[1]  M. Simmonds,et al.  Variation in Volatile Leaf Oils of Eleven Eucalyptus Species Harvested from Korbous Arboreta (Tunisia) , 2010, Chemistry & biodiversity.

[2]  T. Silou,et al.  Yield and Composition of Essential Oils From Eucalyptus citriodora x Eucalyptus torelliana, a Hybrid Species Growing in Congo-Brazzaville , 2009 .

[3]  J. R. Paula,et al.  Seasonal Influence on the Essential Oil Compositions of Eucalyptus urophylla S. T. Blake and E. grandis W. Hill ex Maiden from Brazilian Cerrado , 2008 .

[4]  K. Jaimand,et al.  Chemical Composition of the Essential Oils of Six Eucalyptus Species (Myrtaceae) from South West of Iran , 2007 .

[5]  J. Fernandes,et al.  Electrophysiological responses of eucalyptus brown looper Thyrinteina arnobia to essential oils of seven Eucalyptus species , 2006 .

[6]  E. I. Wang,et al.  Antifungal Activities and Chemical Compositions of Essential Oils from Leaves of Four Eucalypts , 2006 .

[7]  I. Ogunwande,et al.  Chemical Composition of the Essential Oils from the Leaves of Three Eucalyptus Species Growing In Nigeria , 2003 .

[8]  A. Farah,et al.  Effet du sens du croisement sur la teneur et la composition chimique des huiles essentielles des différents hybrides d'Eucalyptus cultivés au Maroc , 2002 .

[9]  S. Apers,et al.  Correlation between chemical composition and antibacterial activity of essential oils of some aromatic medicinal plants growing in the Democratic Republic of Congo. , 2002, Journal of ethnopharmacology.

[10]  D. Bisrat,et al.  Essential Oils of Twelve Eucalyptus Species from Ethiopia , 2000 .

[11]  K. Başer,et al.  Composition of the Essential Oil of Thymus subcollinus Klokov from Turkey , 1997 .

[12]  A. Nduwimana,et al.  Aromatic Plants of Tropical Central Africa. XVI. Studies on Essential Oils of Five Eucalyptus Species Grown in Burundi , 1994 .

[13]  J. Bessière,et al.  Aromatic Plants of Tropical Central Africa. VIII. Individual Selection of Eucalyptus for Essential Oil Production in the Congo , 1992 .

[14]  A. House,et al.  Eucalyptus Leaf Oils Use Chemistry Distillation and Marketing , 1991 .

[15]  E. Dellacassa,et al.  Chemical composition of Eucalyptus essential oils grown in Uruguay , 1990 .

[16]  J. Hutchinson,et al.  The families of flowering plants , 1960 .