Antioxidant Capacity and Phenolic Content of Selected Strawberry Genotypes

Abstract

<jats:p>Eighteen strawberry genotypes were evaluated for their phenolic content and antioxidant capacity using several methods. High antioxidant capacity was found for `Harmonie', `Saint-Jean d'Orléans', and `Saint-Laurent d'Orléans', which were reported to have better shelf life than `Kent'. `Harmonie', `Saint-Jean d'Orléans', `Orléans', and some advanced selections had higher hydroxycinnamic acids, benzoic acids, and flavonols than `Kent'. The significant variation in antioxidant capacity and total phenolic compounds clearly shows the potential value of certain new cultivars and advanced lines as parents in a breeding program. The future plan is to examine individual antioxidant and their role in disease resistance and extension of shelf life and to use selected genotypes as parents to developed new lines.</jats:p>

Antioxidant profile, antioxidant activity, and physicochemical characteristics of strawberries from different cultivars and harvest locations

“…According to Wang and Lin's study (2000), the total phenolic concentration harvested at red ripe stage ranged from 950 to 1520 mg/kg FW, which was lower than our results. Our results also confirmed that the total phenolic concentrations of strawberries depending on the cultivar varied (Wang and Lin 2000;Meyers et al 2003;Rekika et al 2005).…”

“…Several studies were conducted to investigate the correlation between antioxidant concentrations (anthocyanin, flavonoids, and phenolics) and the activities of several fruits (Rekika et al 2005;Shin et al 2008;Shin 2012). In our research, the total flavonoids and total phenolics were highly correlated with the antioxidant activities, and the relationships between total flavonoids and total phenolics were also strong (Figs.…”

“…2). The strong correlation between total phenolics and antioxidant activity of strawberry fruit has been reported (Wang and Lin 2000;Rekika et al 2005;Shin et al 2008). Shin (2012) also found a correlation between total phenolics and antioxidant activity of citrus fruit such as tangerine, lemon, orange, and yuja.…”

“…In contrast, they concluded that the flavonoid concentration of strawberries harvested at the white tip stage was higher (795 mg/kg FW) than red ripe fruit. Rekika et al (2005) reported that the average total anthocyanin concentration of 18 different cultivars was 333 mg/kg FW. However, this result was lower than our finding.…”

“…Other antioxidants and phytochemicals in strawberries include catechin, quercetin, kaempferol (Gil et al 1997;Hannum 2004), and ellagic acid which are recognized as a major phenolic acid in strawberries . Moreover, strawberries have high antioxidant activity (Sun et al 2002;Rekika et al 2005) and antiproliferation activity (Sun et al 2002;Meyers et al 2003) compared to other fruits such as banana, grapefruit, and peach. Ascorbic acid is an important vitamin, more than 90 % of it in the nutritious human diet is supplied by fruits and vegetables.…”