Phytochemicals in fruits of Hawaiian wild cranberry relatives

Abstract

Berries of V. reticulatum and V. calycinum could serve as a rich dietary source of PACs, comparable to or greater than cranberries. These finding suggest that Hawaiian Vaccinium berries could be a functional food. Additional examination of the phytochemicals in other wild Vaccinium species is warranted.

Antimicrobial Activity of Ohelo Berry (Vaccinium calycinum) Juice against Listeria monocytogenes and Its Potential for Milk Preservation

“…Cranberry is rich in antioxidants and polyphenolics that have strong antimicrobial activities and other health benefits [ 8 , 15 , 36 ]. As a Hawaiian wild relative of cranberry, ohelo berry has comparable or even higher phenolic contents than cranberry [ 18 ]. In this study, the total phenolics and anthocyanins in ohelo berry juice were 4.2 mg/mL GAE and 55.11 mg/L cyd-3-glu, respectively.…”

“…The anthocyanins in cranberry juice were in a range of 0.9 to 1.4 mg/100 mL cyd-3-glu and depends on quantification methods [ 21 , 39 ]. Ohelo berry juice has a pH of 3.27, higher than that of cranberry juice (2.70) [ 18 ]. The sugar and titratable acidity ratio of ohelo berry juice was 7.6/1.42 Bx/acid, which was comparable to the results of the phytochemical composition analysis of ohelo berry juice previously [ 18 ].…”

“…The two most common species of ohelo berry are low-growing Vaccinium reticulatum and highbush Vaccinium calycinum [17]. V. calycinum contains a higher level of phytochemicals than V. reticulatum, and the total phenolic content of V. calycinum is seven times that of cranberry [18].…”

“…reticulatum , and the total phenolic content of V . calycinum is seven times that of cranberry [ 18 ].…”

Assessment of Experimental Factors Affecting the Sensitivity and Selectivity of the Spectrophotometric Estimation of Proanthocyanidins in Foods and Nutraceuticals

“…Unfortunately, DMAC provides a rough estimation of the total flavanols, but specific A-type PAC data cannot be obtained by single spectrophotometric analysis (Wallace et al 2010;Granato et al 2016;Van Dooren et al 2018;Ma et al 2019). As a result, separation techniques such as liquid chromatography may be required to discriminate among A-and B-type compounds (Hummer et al 2014;Lu et al 2017;Van Dooren et al 2018;Bakhytkyzy et al 2018;Bakhytkyzy et al 2019). Besides, DMAC has also been used as a staining reagent to develop thin-layer chromatograms of flavanol mixtures (Glavnik et al 2009;Glavnik et al 2011).…”