Chemical markers in species of Echinodorus (Alismataceae) used as “chapéu-de-couro”
DOI:
https://doi.org/10.14808/sci.plena.2021.040202Keywords:
flavonoids, phenols, o-hydroxycinnamic acidAbstract
The name “chapéu-de-couro” is given to plants belonging to genus Echinodorus (Alismataceae) These are native and popularly used as diuretic and anti-inflammatory. The species E. macrophyllus and E. grandiflorus have the recommended use by the Brazilian Pharmacopeia. However, due to the phenotypic plasticity of the genus, precise identification is difficult, therefore, E. floribundus and E. subalatus have been used by the population for the same purpose. The aim of the work was to evaluate chemical markers for the species E. floribundus and E. subalatus and their chemical similarity with the species described in the Brazilian Pharmacopeia. Phytochemical screening revealed the presence of phenols, flavonoids, flavones, flavonols, xanthones, steroids and triterpenoids in the extracts. However, both species presented lower values of flavonoids and total phenols when compared with E. scaber. The characterization of aqueous leaf extract in high performance liquid chromatography (HPLC-DAD) detected 118 and 121 compounds in E. floribundus and E. subalatus, respectively. Of these, 25 showed characteristic UV-Vis spectra of phenolic compounds. Markers chicory acid and isoorientin, present in Echinodorus, weren’t detected. The levels of o-hydroxycinnamic acid derivatives for E. floribundus and E. subalatus (5.52% and 3.07%, respectively) were higher than required by the Brazilian Pharmacopeia. Thus, there are chemical differences between Echinodorus floribundus and Echinodorus subalatus and those described by the Brazilian Pharmacopeia, however, there are indications of pharmacological potential of the species studied.
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Copyright (c) 2021 Rizia Rodrigues Santos, Francine Souza Alves da Fonseca, Alcinei Místico Azevedo, Ernane Ronie Martins
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