(173) Phytonutrient Accumulation and Antioxidant Capacity at Eight Developmental Stages of Black Raspberry Fruit (2025)

Yield, fruit quality, antioxidant capacity and phenolic composition of advanced raspberry lines from Quebec

Ten red raspberry genotypes selected from the Agriculture and Agri-Food Canada breeding program (‘RSK88’, ‘RSK88-1’, ‘RSK88-2’, ‘RSK88-3’, ‘RSK88-4’, ‘RSK88-5’, ‘RSK88-6’, ‘RSK88-7’, ‘RSK88-8’ and ‘SM222’) were studied for their yield, fruit weight, soluble solids content, titratable acidity, shelf life, phenolic content and composition (anthocyanins, flavonols, ellagic acid, procyanidins and resveratrol), and total antioxidant capacity (TAC) compared with two commercially grown cultivars (‘Festival’ and ‘Killarney’). The results showed that ‘RSK88-7’ had higher yield, longer shelf life, higher total phenolic content (TPC; measured by both the Folin–Ciocalteu method and high-performance liquid chromatography), stronger antioxidant capacity, better fruit quality, and higher concentrations of anthocyanins, flavonols, ellagic acid and procyanidins. There was a positive correlation (r = 0.55, p = 0.0006) between TAC and TPC measured by the Folin–Ciocalteu method, and a significant correlation (r = 0.92, p < 0.0001) was found between anthocyanins content and TPC, which was calculated based on the sum of the five classes of phenolic compounds. Anthocyanins were the most predominant phenolic class, accounting for 69.4% of total phenolic, followed by procyanidins. Resveratrol content was lowest among the five classes of phenolic compounds.

Pomological Features, Nutritional Quality, Polyphenol Content Analysis, and Antioxidant Properties of Domesticated and 3 Wild Ecotype Forms of Raspberries (Rubus idaeus L.)

Journal of Food Science, 2011

Antioxidant Capacity and Phenolic Antioxidants of Midwestern Black Raspberries Grown for Direct Markets Are Influenced by Production Site

HortScience, 2008

Black raspberries (Rubus occidentalis L.) are rich in phytonutrients that have demonstrated chemoprotective properties against certain degenerative diseases. To estimate variability in phytonutritional quality among sources of black raspberry, 19 samples representing four common midwestern cultivars obtained from eight production sites were assayed for their antioxidant capacity [2,2-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing ability of plasma (FRAP) methods], total phenolic content (TP), total monomeric anthocyanin levels (TMA), and levels of cyanidin 3-rutinoside. The antioxidant potential among samples averaged 2.92 ± 0.29 and 4.62 ± 0.88 mmol TE·100 g−1 fresh weight by the DPPH and FRAP methods, respectively; TP, TMA, and cyanidin 3-rutinoside means averaged 449 ± 62, 336 ± 109, and 244 ± 84 mg·100 g−1 fresh weight, respectively. Levels of FRAP, TP, TMA, and cyanidin 3-rutinoside were strongly correlated (r = +0.85 to +0.96). Mean antioxidant capacities and phenolic co...

(188) Effects of Storage Temperatures on the Antioxidant Capacity and Anthocyanin Contents of Black Raspberries

HortScience

This study was conducted to determine the effects of postharvest storage temperatures on the antioxidant capacity, anthocyanin compounds, phenolic constituents, and physico-chemical properties of black raspberries. Fresh `MacBlack&#39; berries were stored at 4, 12, 20, and 28 °C for up to 11, 6, 4, and 3 days, respectively. Results showed that higher storage temperatures promoted tissue deterioration (cellular leakage), fungal growth, and moisture loss. The levels of the two major anthocyanins, cyanidin 3-rutinoside and cyanidin 3-xylosylrutinoside, increased by up to 2.7- and 1.9-fold, respectively, with increasing storage temperatures. The antioxidant capacity of berries, as measured by FRAP and ABTS assays, increased by up to 1.5- and 1.4-fold, respectively, which was accompanied by increases in soluble solids, total sugars, total phenolics, and total anthocyanin contents. Our findings indicate that postharvest storage at higher temperatures increases the level of bioactive compo...

Environmental effect on antioxidant content of ten raspberry cultivars

IX International Rubus …, 2005

IMPACT OF SOME ELEMENTS IN THE CULTIVATION TECHNOLOGY ON BIOCHEMICAL AND QUALITATIVE CHARACTERISTICS OF RASPBERRY FRUIT

Effect of Harvesting Time on Flavonoid Content and Antioxidant Activity of Raspberries

In this investigation, major phenolic compounds of raspberry fruits including cyanidin 3-galactoside (anthocyanin) and quercetin 3-galactoside, and the extract antioxidant activity were investigated. Results revealed that early season fruits (in July) had the highest (5.22 mg/g FW) content of quercetin 3-galactoside. Highest (23.43 mg/g FW) and lowest (1.62 mg/g FW) content of anthocyanin found in the fruits in September and October, respectively. Among different harvesting times, fruits in July showed the highest percentage of antioxidant activity (75.84%). This study pointed out that phenolic content and antioxidant potential of raspberry fruit is strongly influenced by ripening time. Based on the results, it could be concluded that early season fruits are richer in antioxidants.

Characterization of Red Raspberry ( Rubus idaeus L.) Genotypes for Their Physicochemical Properties

Journal of Food Science, 2009

Phenotypic diversity in antioxidant phytochemical composition among fruits from several genotypes of red raspberry (Rubus idaeus L.)

Journal of Berry Research, 2012

Influence of Postflowering Temperature on Fruit Size and Chemical Composition of Glen Ample Raspberry ( Rubus idaeus L.)

Journal of Agricultural and Food Chemistry, 2010