3.

Effect of Collection Time on Essential Oil Composition of Lantana camara Linn (Verbenaceae) Growing in Brazil Northeastern

Erlânio O. Sousa, Aracelio C. Viana, Fabiola F. G. Rodrigues, Adriana R. Campos, Sidney G. Lima and José Galberto M. Costa

Programa de Pós-Graduação em Bioprospecção Molecular, Departamento de Química Biológica, Laboratório de Pesquisa de Produtos Naturais, Universidade Regional do Cariri, Rua Cel. Antônio Luiz 1161, Pimenta, 63105-000 Crato-CE, Brasil.

Vice-Reitoria de Pesquisa e Pós-Graduação, Universidade de Fortaleza, Av. Washington Soares 1321, Edson Queiroz, 60811-905, Fortaleza-CE, Brasil.

Departamento de Química, Universidade Federal do Piauí, Campus Universitário Ministro Petrônio Portella, 64049-550, Bairro Ininga,Teresina-PI, Brasil.

Abstract: To verify the composition variation of its essential oil along 24 hours, leaves of Lantana camara  Linn. of medicinal plant collection of the Department of Chemical Biology of URCA-Crato–CE, were collected every three hours during one day (of the 07:00 to 19:00 h) in April, 2008. The leaves had its oil extracted by hydro-distillation in Clevenger apparatus during three hours with two repetitions. The chemical composition analysis of the extracted essential oils was carried out in gas chromatography/mass spectroscopy. The phytochemical profile of the essential oils presented significant difference in function of the harvest. The seven most abundant were: germacrene D (24.50-6.15%), biciclogermacrene (33.32-14.27%), spathulenol (25.04-1.06%), eremophilene (20.64-1.93%), valecene (33.70-0.84%), viridiflorene (19.46%) and 1,10-di-epi-cubenol (27.93-21.32). The different result found here indicates the existence of different chemotypes of L. camara

Keywords: Lantana camara Linn; essential oil; chemical variability; chemical composition.