Quantification of Resveratrol in Different Parts of Solid Pinotage Winery Waste: Investigating the Variance Between Consecutive Harvests

Abstract

Resveratrol is phenolic compound that is produced by several plant species as a protection mechanism against biotic and abiotic stress. Resveratrol is currently being investigated as nutraceutical supplement, and there is a market value for the compound. The aim of this work was to investigate, through consecutive harvests the variability of solid winery waste as a source of resveratrol as an antioxidant supplement. In this study the different parts of Pinotage solid winery waste from a 2018 and 2019 harvests were investigated as a possible resveratrol source. From the comparison of the different sources over time it was found that the 2019 Pinotage stems contained a maximum of 73 ± 4.3 µg/g resveratrol. Variable resveratrol concentrations were noted between consecutive harvests, indicating a variability in productivity. Furthermore, resveratrol distribution throughout the plant was variable, with the canes and stems having the highest concentrations. Nonetheless, it was concluded that Pinotage solid winery waste can be used as a possible source of resveratrol. The findings in this paper provide information about the extractable resveratrol and total phenolic content of different parts of Pinotage solid winery waste and the variability of resveratrol content both within the plant, and between harvests.

Role of Resveratrol in Prevention and Control of Cardiovascular Disorders and Cardiovascular Complications Related to COVID-19 Disease: Mode of Action and Approaches Explored to Increase Its Bioavailability

“…Abundance of resveratrol in different sources is presented in Table 1. Food processing byproducts are considered readily available economical sources of resveratrol, such as grape pomace, cane and leaves [14], peanut roots [15], soybean seed coat [16], hop pellets [17] and so on. For instance, grape cane contains about 5 mg/g dry weight [18].…”

Role of Resveratrol in Prevention and Control of Cardiovascular Disorders and Cardiovascular Complications Related to Covid-19 Disease: Mode of Action and Approaches Explored to Increase Its Bioavailability

“…Data was obtained from Phenol-Explore database (http://phenolexplorer.eu/). Food processing by-products are considered readily available economical source of resveratrol, such as grape pomace, cane and leaves [14], peanut roots [15], soybean seed coat [16], hop pellets [17] and so on. For instance, grape cane contains about 5 mg/g dry weight [18].…”

Retaining Resveratrol Content in Berries and Berry Products with Agricultural and Processing Techniques: Review

“…Resveratrol is predominantly found in the skins of grape berries [38,39]. This is particularly significant as the skin is used extensively in the production of red wine, where resveratrol is extracted during the fermentation process [40][41][42][43]. Leaves also contain resveratrol, although the concentration can vary widely depending on the berry variety and the environmental factors affecting the plant [44,45].…”