Influência da idade da planta na produção de óleo essencial de alevante

Abstract

The essential oil content and chemical composition are genetic characteristics and can be influenced by the environment and the developmental stage or age of the plant. Thus, this study aimed to evaluate the influence of the plant age on production and quality of essential oil of peppermint. The experiment was conducted in Ilhéus, BA from May to December 2009. The treatments consisted of harvesting the plant at six ages (60, 90, 120, 150, 180 and 210 days after transplantation) using completely randomized design with four replications. The essential oil was obtained by hydrodistillation in a Clevenger modified apparatus. The identification of chemical constituents was performed by gas chromatography with mass spectrometry (GC-MS). The highest content of essential oil (1%) was obtained at 120 days while the highest content the majority compounds α-fenchol (49.92%) and cis-myrtanol (30.03%) reached its highest value at 120 and 150 days after transplanting, respectively. Influência da idade da planta na produção de óleo essencial de alevante O teor de óleo essencial e a sua composição química são características genéticas e podem ser influenciados pelo ambiente e pelo estádio de desenvolvimento ou idade da planta. Dessa forma, objetivou-se, com este trabalho, avaliar a influência da idade da planta sobre a produção e a qualidade do óleo essencial de alevante. O experimento foi conduzido em Ilhéus, BA, no período de maio a dezembro de 2009. Os tratamentos foram constituídos da colheita, em seis idades da planta (60, 90, 120, 150, 180 e 210 dias após o transplante), utilizando-se o delineamento inteiramente casualizado, com quatro repetições. O óleo essencial foi obtido por hidrodestilação, em aparelho de Clevenger modificado. A identificação dos constituintes químicos foi realizada por cromatografia gasosa acoplada ao espectrômetro de massas (CG-EM). O maior teor do óleo essencial (1%) ocorreu aos 120 dias e o maior teor dos compostos majoritários α-fenchol (49,92%) e cis-mirtanol (30,03%), aos 120 e 150 dias após o transplante, respectivamente.Palavras-chave: Mentha x piperita var. citrata, alevante, planta medicinal, α-fenchol, cis-mirtanol.

Characterization of Nanospheres Containing Zanthoxylum riedelianum Fruit Essential Oil and Their Insecticidal and Deterrent Activities against Bemisia tabaci (Hemiptera: Aleyrodidae)

“…Other compounds similar to those described herein were described by Costa et al [ 22 ], including bicyclogermacrene, spathulenol, β-caryophyllene, germacrene B, and α-pinene, among others—albeit in different amounts. Although some compounds corroborate the existing literature, the existing differences are determined by several factors, such as the plant development stage, genetic traits, soil composition, climate, and nutrition [ 28 , 29 , 30 ]. Such factors induce significant changes in secondary metabolite production, influencing the content and chemical composition of the essential oil.…”

Chemical diversity and influence of plant age on the essential oil from Lippia sidoides Cham. germplasm

“…Additionally, Oliveira et al (2012) found a marked reduction in the content of essential oils for the species Mentha piperita var. citrata as the plants aged.…”

“…Studies have shown that the aging process of plants may cause a reduction in the content of essential oils and major compounds (Matos and Innecco, 2002;Figueiredo et al, 2009;Oliveira et al, 2012), whereas other studies have detected variations in the chemical behavior of plants because of the age and development stage and shown that age can promote increased levels of essential oils and major constituents (Santos and Innecco, 2004). Therefore, such studies are indispensable for determining the optimal conditions for cultivating and harvesting aromatic species because such information ensures that essential oils have the required quality and safety because the market requires quality essential oils of a predetermined composition (Carvalho Filho et al, 2006).…”

Chemical diversity of essential oils from Hyptis pectinata (L.) Poit

“…Variation in chemical compounds is usually observed among plants of the same species (KLEINE and MULLER, 2011). The number of compounds and the concentrations of each compound in the essential oil of the plants and the oil content can be influenced by genetic, climatic, and/or edaphic factors (OLIVEIRA et al, 2012;TEIXEIRA et al, 2013;BLANK et al, 2015;COSTA et al, 2015;PINTO et al, 2015).…”