Abstract
The objective of this research was to identify secondary metabolites in ethanolic extracts of different species of orchid genera by means of a phytochemical screening, where tests for alkaloids, flavonoids, saponins, tannins and triterpenes were carried out. In addition, the antioxidant capacity of 35 orchid species of the Caucaea, Epidemdrum and Oncidium genera was evaluated, using the DPPH method to analyze the free radical scavenging capacity; vitamin C was used as a positive control for this analysis. The results determined in the phytochemical screening that the secondary metabolites that were most present in the species studied were flavonoids, triterpenes and saponins. The species under study of the genus Caucaea and Oncidium presented a positive reaction for flavonoids and triterpenes in greater quantities, while the samples of the genus Epidendrum presented saponins in 100 %. In the analysis of antioxidant activity with DPPH methodology, the most outstanding species were Oncidium excavatum and Epidendrum nocturnun, the latter species stood out because it needed a concentration of 3.50 ppm to inhibit 50 % of the DPPH free radicals present in a test solution.
Translated title of the contribution | Phytochemical Study, Antioxidant Activity of Orchid Species of the Genera Epidemdrum, Oncidium and Caucaea |
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Original language | Spanish (Ecuador) |
Pages (from-to) | 1-17 |
Number of pages | 17 |
Journal | Bionatura |
Volume | 1 |
Issue number | 1 |
DOIs | |
State | Published - 17 Apr 2019 |
Keywords
- Antioxidant
- Dpph
- Metabolites
- Orchids
- Screening
CACES Knowledge Areas
- 115A Biology