Intraspecific Variation in the Essential Oils from Drimys brasiliensis Leaves and Stem Barks

The essential oils from leaves and stem barks of Drimys brasiliensis Miers (Winteraceae), collected in July and December 2008, were analyzed by GC/FID and GC/MS. The stem bark oils were composed mainly of monoterpenes (July, 45 +/- 3%; December, 92 +/- 4%), while the oils from leaves showed the predominance of sesquiterpenes (July, 47 +/- 1%; December, 55 +/- 1%). The variation in the relative amount of constituents could be associated, at least in part, to several microclimatic parameters such as precipitation, temperature and/or phenological state, which were different for each collection of D. brasiliensis.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Univ Fed Sao Paulo, Inst Ciencias Ambientais Quim & Farmaceut, BR-09972270 Diadema, SP, BrazilUniv Presbiteriana Mackenzie, Ctr Ciencias & Humanidades, BR-01302907 Sao Paulo, BrazilUniv Fed Alfenas, Dept Ciencias Exatas, BR-3730000 Alfenas, MG, BrazilUniv Presbiteriana Mackenzie, Ctr Ciencias Biol & Saude, BR-01302907 Sao Paulo, BrazilUniv Fed Sao Paulo, Inst Ciencias Ambientais Quim & Farmaceut, BR-09972270 Diadema, SP, BrazilWeb of Scienc