Rooting of cuttings and analysis of essential oils from wild and cultivated Piper macedoi Yunck

• Autor(a) principal: Gisele Lopes Oliveira
• Data de Publicação: 2016
• Outros Autores: Christiano da Conceição de Matos, Rizia Rodrigues Santos, Janini Tatiane Lima Souza Maia, Ernane Ronie Martins, Lourdes Silva de Figueiredo, Davyson de Lima Moreira, Maria Auxiliadora Coelho Kaplan
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFMG
• Texto Completo: http://hdl.handle.net/1843/48838
• topic: Piperaceae; Rooting; Stem cutting; Terpene; Arbustos ; Essencias e oleos essenciais ; Propagação

Piper macedoi Yunck. is a shrub with selective habitat that grows in Southeastern Brazil in damp places, especially in swampy areas of forests. The aim of this study was to evaluate the influence of the diameter of stem cuttings on rooting and root growth as well as to analyze the chemical composition of the essential oil from leaves of Piper macedoi. For the rooting study was used a randomized design with four treatments and five replications, each plot consisted of five stem cuttings that were evaluated after 65 days. The essential oil was obtained from fresh leaves of P. macedoi from wild habitat (October 2011) and cultivated (September and October 2011) by hydrodistillation and analyzed by GC-FID and GC-MS. Stem cuttings with smaller diameter had lower root length, root dry weight, number of leaves and number of shoots. Only rooting percentage did not differ from stem cuttings diameter. The average rooting achieved was 75%. The chemical composition of essential oil from wild and cultivated plants was similar. Plants from cultivation in September showed a slight difference in chemical composition, once the arylpropanoid fraction was higher than wild habitat and cultivation in October. Comparison between wild and cultivation in October showed the main volatile fraction characterized as monoterpenes (wild 46.2%; cultivated 46.7%), being trans-β-ocimene (wild 28.5%; cultivated 24.9%) identified in higher content. The sesquiterpene fraction (wild 20.9%; cultivated 22.6%) showed to be diversified and arylpropanoids were also identified in great amounts (wild 25.3%; cultivated 23.5%). The results showed that Piper macedoi can be propagated by stem cuttings technique and the diameter of the stems does not influence in the rooting percentage. The analysis of the volatile components of this species showed large amount of trans-β-ocimene and sarisan, two compounds with large range of biological activities.