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 were carried out for alkaloids, flavonoids, saponins, tannins and triterpenes. In addition, the antioxidant capacity of 35 species of orchids of the genera Caucaea, Epidemdrum and Oncidium was evaluated. For this purpose, the DPPH method was used to analyze the capacity to capture free radicals. The results determined in the phytochemical screening that the secondary metabolites that had more presence in the studied species were flavonoids, triterpenes and saponins. The species under study of the genus Caucaea and Oncidium presented positive reaction for flavonoids and triterpenes in greater quantity, 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 last species was highlighted because it needed a concentration of 3.50 ppm to inhibit 50% of the free radicals of DPPH present in a test solution.
|Translated title of the contribution||Phytochemical Study, Antioxidant Activity of Species of Orchids of the Genera Epidemdrum, Oncidium and Caucaea|
|Original language||Spanish (Ecuador)|
|Issue number||Bionatura Conference Serie|
|State||Published - 15 Nov 2018|