Essential oil from two populations of Echinodorus grandiflorus (Cham. & Schltdl.) Micheli (Chapéu de couro)

Abstract

Analysis by Gas Chromatography and Gas Chromatography/Mass Spectrometry of the essential oils obtained from leaves of Echinodorus grandiflorus (" Chapéu de couro") from two different populations (Big Leaves and Small Leaves), collected monthly between September 1998 and December 1999 revealed 17 components. Phytol was the major constituent for both populations. The main sesquiterpene representatives are (E)−caryophyllene, α-humulene and (E)-nerolidol.

Some Secondary Metabolites in Leaves of Echinodorus grandiflorus (Cham. & Schldl.) Micheli in Brazil

“…In the fall season, we verified that flavonoid contents were higher in all treatments, when compared with other seasons of the year, differing from results obtained by Pimenta [10], where the highest contents were obtained during spring and in the full sun. We remind that the contents in the present study were obtained under 50% shading.…”

“…In recent studies, Pimenta [10] observed a higher amount of inflorescences in E. grandiflorus grown in the full sun and at 50% shading in Rio de Janeiro, in the Brazilian Southeast; he also verified that the population of plants with smaller leaves suffered greater interference from light than the population that showed larger leaves.…”

“…Pimenta [10] observed greater production of flavonoids and arylpropanoids in E. grandiflorus in the sunny days and during spring, suggesting that both flavonoids and arylpropanoids may be involved in the defense against photooxidation. He also reported that in E. grandiflorus, flavonoids and arylpropanoids vary together, showing the same pattern of response to growing conditions (50% shading, full sun, moderate flooding levels, with or without suppression of the inflorescence).…”

In vitro antioxidant capacity of tea of Echinodorus grandiforus, “leather hat,” in Wistar rat liver

“…It is popularly known as "leather hat" and is widely used in folk medicine, in the treatment of various diseases (Souza et al 2004, Tibiriçá et al 2007, Brugiolo et al 2010). According to Pimenta et al (2006), its leaves are popularly used as a diuretic and anti-inflammatory remedy, as well as for treating kidney and liver disorders. The active ingredients identified in the plant include the flavonoids.…”

Validação de metodologia analítica para a determinação de derivados do ácido o-hidroxicinâmico de Echinodorus grandiflorus

“…A composição química de folhas das espécies de Echinodorus avaliada até o presente sugere um conteúdo químico constituído por ácido trans-aconítico, glicosilflavonas e ácido hidroxitartárico (Schnitzler et al, 2007), sesquiterpenos (Pimenta et al, 2006) e, principalmente, diterpenos dos tipos clerodano, cembrano e labdano (Manns & Hartmann, 1993;Tanaka et al, 1997;Costa et al, 1999;Kobayashi et al, 2000a;b), substâncias estas presentes nos extratos avaliados e que, provavelmente, estão envolvidas nas atividades biológicas relatadas até o momento, tais como atividade anti-hipertensiva (Lessa et al, 2008), imunossupressora (Pinto et al, 2007), vasodilatadora (Tibiriçá et al, 2007), hipocolesterolemiante (Cardoso et al, 2005), antimicrobiana (Coelho de Souza et al, 2004), diurética (Ribeiro et al, 1988;Cardoso et al, 2003) e analgésica e antiinflamátoria (Cardoso et al, 2003;Dutra et al, 2006). No entanto, Garcia et al (2010) demonstraram que a fração contendo derivados do ácido tartárico não possui atividade antiedematogênica.…”