Data/hora: 07/06/2024 08:22:55

Provedor de dados: 	52	
País: 	Brazil	
Título: 	Seasonal influence on the essential oil production of Nectandra megapotamica (Spreng.) Mez	
Autores: 	Amaral,Lúcio de Paula; Tondolo,Juliana Simoni Moraes; Schindler,Bianca; Silva,Daniela Thomas da; Pinheiro,Carlos Garrido; Longhi,Solon Jonas; Mallmann,Carlos Augusto; Heinzmann,Berta Maria.	
Data: 	2015-02-01	
Ano: 	2015	
Palavras-chave: 	Lauraceae; Phenology; Variability of volatile oils; Terpenes.	
Resumo: 	This study evaluated the seasonal influence on the yield and chemical composition of the essential oil (EO) of Nectandra megapotamica. Fresh young (YL) and old leaves (OL) obtained from three trees in each season (Nov/2010 to Sep/2011) collected in Santa Maria-RS were hydrodistilled in triplicate. The chemical composition was determined by the gas chromatography coupled to mass spectrometry (GC-MS) and the yield on dry basis was evaluated by two-way ANOVA (seasons, development stage). Spring (Sp) and summer (Su) showed higher average incomes (0.45 and 0.33%), which occurred when flowering, fruiting, and growth of YL and senescence of OL took place, while autumn (Au) presented the lowest yield (0.25%) during the rustification of OL. The highest yield was obtained for the YL in Sp (0.59%) and the lowest for the OL in Au (0.21%). The major constituents of the EO were independent from the season and were identified as α-pinene, bicyclogermacrene, β-pinene, germacrene D, and limonene. Seasonality and phenology influenced the production of EO probably due to morphological and metabolic alterations in the leaves as well as due to the needs of the tree, such as attraction and/or protection.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000100012	
Editor: 	Instituto de Tecnologia do Paraná - Tecpar	
Relação: 	10.1590/S1516-8913201502462	
Formato: 	text/html	
Fonte: 	Brazilian Archives of Biology and Technology  v.58 n.1 2015	
Fonte: 	info:eu-repo/semantics/openAccess