Abstract
Echinocystis lobata (Mich.) Torr. et Gray extracts were investigated for their bioactive compounds and their potential for natural antioxidant properties. In vitro antioxidant activity of methanol, ethanol, and water extracts were evaluated by 1,1-diphenyl-picrylhydrazyl (DPPH) radical scavenging activity. Total phenolic content (TPC) and total flavonoid content (TFC) of fruits and seeds were determined. TPC is a fairly constant value and varies weakly both among the different organs of Echinocystis lobata and among the geographical locations of the populations studied. Like other invasive species, Echinocystis lobata is superior to many other plants in terms of the total amount of flavonoids contained in its fruits and seeds. The dried fruits contain more flavonoids than the seeds. Seeds from Slovak populations have higher flavonoid content than those from Russian populations. The results demonstrated that Echinocystis lobata can be a good source of natural antioxidants and have a great potential for commercialization, especially in the pharmaceutical industry.
Highlights
The secondary plant metabolites, polyphenols, have a wide spectrum of actions such as modulation of lipid peroxidation, free radical scavenging, inhibition of hydrolytic and oxidative enzymes, and anti-inflammatory activity (Lu et al 2016)
Echinocystis lobata is superior to many other plants in terms of the total amount of flavonoids contained in its fruits and seeds
Echinocystis lobata is an annual vine with stems that can be as long as 6 m (Vinogradova, 2006) and which climb, with the help of coiling, branched tendrils, over shrubs and fences or trail across the ground
Summary
The secondary plant metabolites, polyphenols, have a wide spectrum of actions such as modulation of lipid peroxidation, free radical scavenging, inhibition of hydrolytic and oxidative enzymes (phospholipase A2, cyclooxygenase), and anti-inflammatory activity (Lu et al 2016). The current focus is on the antioxidant activity of polyphenols. It is this activity that determines the pharmacological effects. Scientists are constantly searching for plants whose organs contain substances with high antioxidant activity, namely Cydonia Mill. (Monka et al, 2014; Grygorieva et al, 2020), Cornus mas L. (Klymenko, Grygorieva and Brindza, 2017), Diospyros virginiana L. (Grygorieva et al, 2018), Sambucus nigra L. (Ivanišová et al, 2017), Hippophae rhamnoides L. (Ivanišová et al, 2020), Lycium spp. Our previous studies have already demonstrated very high antioxidant activity in several invasive species: Aronia mitschurinii A.K.Skvortsov & Maitul. Our previous studies have already demonstrated very high antioxidant activity in several invasive species: Aronia mitschurinii A.K.Skvortsov & Maitul. (Vinogradova et al, 2017, 2020) and Solidago canadensis L. (Shelepova et al, 2020)
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