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Evid Based Complement Alternat Med. 2011;2011:464289. doi: 10.1093/ecam/nep077. Epub 2011 Jun 23.

Seasonality Role on the Phenolics from Cultivated Baccharis dracunculifolia.

Evidence-based complementary and alternative medicine : eCAM

João Paulo B de Sousa, Mateus F Leite, Renata F Jorge, Dimas O Resende, Ademar A da Silva Filho, Niege A J C Furtado, Ademilson E E Soares, Augusto C C Spadaro, Pedro Melillo de Magalhães, Jairo K Bastos

Affiliations

  1. Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Avenida do Café, s/n, 14040-903, Ribeirão Preto, Brazil.

PMID: 19605554 PMCID: PMC3136527 DOI: 10.1093/ecam/nep077

Abstract

Baccharis dracunculifolia is the source of Brazilian green propolis (BGP). Considering the broad spectrum of biological activities attributed to green proplis, B. dracunculifolia has a great potential for the development of new cosmetic and pharmaceutical products. In this work, the cultivation of 10 different populations of native B. dracunculifolia had been undertaken aiming to determine the role of seasonality on its phenolic compounds. For this purpose, fruits of this plant were collected from populations of 10 different regions, and 100 individuals of each population were cultivated in an experimental area of 1800 m(2). With respect to cultivation, the yields of dry plant, essential oil and crude extract were measured monthly resulting in mean values of 399 ± 80 g, 0.6 ± 0.1% and 20 ± 4%, respectively. The HPLC analysis allowed detecting seven phenolic compounds: caffeic acid, ferulic acid, aromadendrin-4'-methyl ether (AME), isosakuranetin, artepillin C, baccharin and 2-dimethyl-6-carboxyethenyl-2H-1-benzopyran acid, which were the major ones throughout the 1-year monthly analysis. Caffeic acid was detected in all cultivated populations with mean of 4.0%. AME displayed the wide variation in relation to other compounds showing means values of 0.65 ± 0.13% at last quarter. Isosakuranetin and artepillin C showed increasing concentrations with values between 0% and 1.4% and 0% and 1.09%, respectively. The obtained results allow suggesting that the best time for harvesting this plant, in order to obtain good qualitative and quantitative results for these phenolic compounds, is between December and April.

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