Shade level effects on yield and chemical composition of the leaf essential oil of Pothomorphe umbellata (L.) Miquel

Abstract

Pothomorphe umbellata (L.) Miquel, is a medicinal species that belong to the Piperaceae family and commonly called "pariparoba" and "caapeba". It grows in regions rich in humus, humidity and under the shade of trees, which contribute for its best growth as it is considered a species sciophyte. The effect of shade on the yield and chemical composition of essential oil of Pothomorphe umbellata (Piperaceae) leaves was evaluated. Nine-month-old seedlings were planted in October 2002 and subjected to three shade levels (30%, 50%, 70%) and full sun; the experimental design was in randomized blocks, with four treatments and six replications, in split-plot in time scheme. Two harvests of aerial part were made (05/2003 and 05/2004). Essential oil was extracted by hydrodistillation and chemically analyzed by gas chromatography-mass spectrometry (GC-MS). The highest essential oil yield was observed in the second harvest and plants under 30% shade. Twenty-six chemical substances were identified, of which trans-nerolidol was predominant. Key words: Piperaceae, cultivation systems, trans-nerolidol, medicinal plant Efeito de níveis de sombreamento no teor e composição química do óleo essencial de folhas de Pothomorphe umbellata (L.) MiquelRESUMO: Pothomorphe umbellata (L.) Miquel é uma espécie medicinal brasileira, pertencente à família Piperaceae e popularmente conhecida como pariparoba e capeba. Desenvolve-se em regiões ricas em húmus, umidade e abaixo das sombras de árvores, que contribuem para seu melhor desenvolvimento, é considerada uma espécie esciófita. Avaliou-se o efeito do sombreamento no teor e composição química do óleo essencial de folhas Pothomorphe umbellata (Piperaceae). Mudas com nove meses foram levadas para campo em outubro de 2002 e submetidas a três níveis de sombreamento (30%, 50%, 70%) e a pleno sol, em delineamento experimental de blocos ao acaso, com quatro tratamentos e seis repetições, no esquema de parcelas subdivididas no tempo. Foram realizadas duas colheitas da parte aérea

Yield and composition of lavender essential oil grown in substrate

“…The results indicate that cultivation outside soil can be an alternative for production of lavender biomass in the southern region of Brazil. Several chemical constituents in the essential oil by the luminosity conditions confirm observations of Mattana et al (2010) who showed that, although the concentration of the major compound trans-nerolidol is reduced in shaded composition and proportion between leaves and inflorescences, standing out the camphor, which was reduced to approximately half and linalol, which was superior in leaves. Differences in composition and proportion of the harvests throughout the year are possible without replacing plants, in protected crop structures with high transmissivity to solar radiation.…”

“…Results from literature on the effect of shading on the production of essential oil showed that each species reacts differently. Reduced levels of solar radiation increase essential oil yield in basil plants (Ocimum gratissimum) (Ade-Ademilua et al, 2013) and pariparoba (Pothomorphe umbellate) (Mattana et al, 2010) while decrease in peppermint (Mentha arvensis) (Chagas et al, 2013) and herb-copaiba (Otacanthus azureus) (Serudo et al, 2013). The results of this work indicate that Lavandula dentata can be included in the second group.…”

Metabolomic analysis and effects of meteorological factors on phenolic and non-phenolic chemotypes of Thymus pulegioides L. cultured in the same locality

“…The higher solar radiation and the whole lightness activate the accumulation of essential oils in Lippia alba (Verbenaceae), Baccharis trimeria (Asteraceae), T. vulgaris: the higher photosynthetically active solar radiation activates the synthesis of the products of photosynthesis, whereof essential oils as the secondary plant metabolites are biosynthesized Gosselin, 1995, 1996;Sangwan et al, 2001;Silva et al, 2006). However, some facts suggest that higher lightness can reduce the accumulation of essential oils in Anethum graveolens (Apiaceae), Salvia officinalis (Lamiaceae), Potomorphe umbelata (Piperaceae) (Saleh, 1973;Halva et al, 1992;Mattana et al, 2010). Our study showed that PAR April-July significantly positively influenced the yield of the essential oils in C chemotype of T. pulegioides (r = 0.89, p < 0.05) ( Table 3).…”

Development and bloom in hybrids of wild passion fruit cultivated in different types of pots and shading levels

“…The photoperiod acts mainly in the change from the vegetative to the reproductive state, which could be determining for some species in the definition of their blossomtime (Hopkins, 1999). Mattana et al (2010) observed that chemical composition of the leaf essential oil was influenced by intensities of light in Pothomorphe umbellate (L.) Miquel…”