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Acta Amazonica

Print version ISSN 0044-5967On-line version ISSN 1809-4392

Acta Amaz. vol.32 no.1 Manaus Jan./Mar. 2002 


Flower scent analysis of Encyclia Vespa (vell.) Dressler & G. E. Pollard and E. Fragrans (Sw.) Lemée

Análise do aroma das flores de Encyclia vespa (Veil.) Dressier & G. Ε. Pollard and Ε. fragrans (Sw.) Lemée

Maria das Graças Β. ZOGHBI1 

Eloisa Helena A. ANDRADE1 

Manoela Fernandes F. da SILVA1 

José Guilherme S. ΜΑΙΑ2 

1Museu Paraense Emílio Goeldi, Departamento de Botânica, CP 399, 66040-170 Belém, PA, Brazil

2Universidade Federal do Pará, Departamento de Química, 66075-900 Belém, PA, Brazil


The volatile constituents obtained from the pentane extract, using simultaneous distillation-extraction of the flowers of Encyclia vespa and E. fragrans were analysed by GC/ MS. The main volatile components identified in the flowers of E. vespa were terpinen-4-ol (20.3%), verbenone (14.8%), trans-verbenol (13.6%) and x-pinene (11.8%). The major volatiles of the flowers of E. fragrans were terpinen-4-ol (18.3%), (2Z,6E)-farnesol (15.4%) and trans-verbenol (10.2%).

Key words: Encyclia vespa; Encyclia fragrans; Orchidaceae; flower volatiles; terpinen-4-ol; verbenone; /trans-verbenol; (2Z,6E')-farnesol; x-pinene


Os constituintes voláteis obtidos dos extratos pentânicos das flores de Encyclia vespa e E. fragrans através de destilação-extração simultânea foram analisados por CG/EM. Os principais componentes voláteis identificados nas flores de E. vespa foram terpinen-4-ol (20,3%), verbenona (14,8%), trans-verbenol (13,6%) e a-pineno (11,8%). Os principais voláteis das flores de E. fragrans foram terpinen-4-ol (18,3%), (2Z,6E)-farnesol (15,4%) e trans-verbenol (10,2%).

Palavras-Chave: Encyclia vespa; Encyclia fragrans; Orchidaccae; voláteis de flores; terpinen-4-ol; verbenona; trans-verbenol; (2Z,6E)-farnesol; x-pineno

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