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Abstract
This study aimed to investigate the variation in essential oils yield, chemical composition and antifungal property in Ocotea lancifolia (Schott) Mez population from Brazil. The oils were obtained by hydrodistillation from the leaves and reproductive organs collected from 12 trees. The volatile composition was established by gas chromatography and the chemical variability was assessed by multivariate procedures. The fungistatic activity against the Fusarium moniliforme was evaluated as well. Higher yields from leaves oils were obtained in spring (1.03%) and summer (0.96%). By multivariate analysis, the oils were separated in two groups. Caryophyllene oxide and bicyclogermacrene were the major constituents in healthy trees (first group) and the oils obtained from damaged trees, which contained β-chenopodiol, constituted the second one. It was observed a significant higher mycelial inhibition for the leaves oils (67.5%). Overall, we identified that the stage of development of the reproductive organs and microbiological damage influenced O. lancifolia oil.
Acknowledgements
The authors are grateful to CAPES (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior) and CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico, process 454447/2014-0) for supporting this research. MFB Muniz and BM Heinzmann received research grants from CNPq. DT Silva and CG Pinheiro are grateful to CAPES for their PhD fellowships, NH Bianchini and BF Batista received undergraduate scholarships from CNPq; and we specially thank Dr. João Batista Baitello for the species identification.