Antioxidant capacity, total phenolic and ascorbate content as a function of the genetic diversity of leek (Allium ampeloprasum var. porrum)

Bernaert, Nathalie; Paepe, Domien De; C, Bouten; Clercq, Hervé De; Stewart, Derek; Bockstaele, Erik Van; Loose, Marc De; Droogenbroeck, Bart Van

doi:10.1016/j.foodchem.2012.02.159

Cited by 87 publications

(67 citation statements)

References 69 publications

(59 reference statements)

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“…40) The ascorbic acid levels in A. roylei were higher than those recorded in the white shaft and green leaves of leek cultivars (A. ampeloprasum var. porrum), which varied from 0.89 to 3.55 mg/g dw, 41) and in A. schoenoprasum leaves, 24.59 mg/100 g fw. 42) The high ascorbic acid content in A. roylei has important relevance, from a nutritional point of view, that makes this plant promising for nutritional enhancement of other edible Alliums through breeding programs.…”

Section: Polyphenolmentioning

confidence: 97%

Compartmentation and localization of bioactive metabolites in different organs of Allium roylei

Abdelrahman

Hirata

Ito

et al. 2014

Bioscience, Biotechnology, and Biochemistry

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To investigate the involvement of Allium roylei metabolites in the plant's defenses, a comprehensive analysis of the content of cysteine sulfoxides, flavonols, polyphenols, ascorbic acid, and saponins was carried out in the various organs of this species. Metabolomics high performance liquid chromatography (HPLC), spectral-based analysis, and histochemcial studies have given important insight to the validity of saponins as a key component involved in plant protection. The root-basal stem, bulb, and leaf extracts exhibited 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity with inhibition concentration (IC 50 ) ranging from 0.649 to 0.757 mg/mL. The antimicrobial properties of the saponin and flavonoid crude extracts were evaluated. The saponin extracts demonstrated significant antifungal activity depending on the applied concentration, and the growth inhibition rate of the tested fungal pathogens ranged from 1.07 to 47.76%. No appreciable antibacterial activity was recorded in the same sample.Key words: cysteine sulfoxides; flavonoids; saponins; antioxidant activity; antimicrobial activityThe need for disease-and pest-resistant germplasm in onion (Allium cepa L.) breeding has promoted studies of the biosystematic relationships between edible and wild Allium species of the section Cepa.1) Domestication of wild Allium species started millennia ago, followed by extensive dissemination of the flavoring condiment all over the world.2) Many wild Allium species with the characteristic onion or garlic aroma are used as spices or vegetables by various folks.3) The wild Allium species may serve as a potential source for Allium crop improvement, and it may comprise genes for desired traits, as in Allium roylei Stearn. 4) A. roylei has proven to be a crucial bridge species, enabling introgressions of genetic resources from other related species of section Cepa into the onion, allowing disease resistance and other valuable characteristics to be introgressed into the onion.5) The prospect of exploiting A. roylei as a source of disease resistance in onion breeding is very promising, as this wild species has proven to be completely resistant to downy mildew (Perenospora destructor), and partially resistant to leaf blight disease caused by Botrytis squamosa and basal rot disease caused by Fusarium oxysporum f.sp. cepae. 6)Although edible Allium species are rich in numerous phytonutrients and bioactive metabolites (cysteine sulfoxides (ACSO), flavonoids, polyphenols, saponins, etc.) which reportedly have many functional properties such as antimicrobial, anticancer, and antioxidant, 7,8) little effort has been invested in evaluating the wild Allium species as potential sources for these bioactive metabolites with therapeutic and disease resistance properties.There is no available information concerning the distribution and localization of these bioactive metabolites in different organs of A. roylei and their role as a part of the defensive characteristics of the plant against F. oxysporum f.sp cepae. Therefore, under...

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Section: Polyphenolmentioning

confidence: 97%

Compartmentation and localization of bioactive metabolites in different organs of Allium roylei

Abdelrahman

Hirata

Ito

et al. 2014

Bioscience, Biotechnology, and Biochemistry

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“…Total phenolic content was significantly and positively correlated with antioxidant activity in onion and shallot (13), garlic (14), and leek (20). Among Allium polyphenols, the flavonoid quercetin was further investigated, revealing strong antioxidant activity (21).…”

Section: Introductionmentioning

confidence: 99%

Relationships among Bioactive Compounds Content and the Antiplatelet and Antioxidant Activities of Six Allium Vegetable Species

Beretta

Bannoud

Insani

et al. 2017

Food Technol. Biotechnol.

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SummaryAllium sp. vegetables are widely consumed for their characteristic flavour. Additionally, their consumption may provide protection against cardiovascular disease due to their antiplatelet and antioxidant activities. Although antiplatelet and antioxidant activities in Allium sp. are generally recognised, comparative studies of antiplatelet and antioxidant potency among the main Allium vegetable species are lacking. Also, the relationship between organosulfur and phenolic compounds and these biological activities has not been well established. In this study, the in vitro antiplatelet and antioxidant activities of the most widely consumed Allium species are characterised and compared. The species total organosulfur and phenolic content, and the HPLC profiles of 11 phenolic compounds were characterised and used to investigate the relationship between these compounds and antiplatelet and antioxidant activities. Furthermore, antiplatelet activities in chives and shallot have been characterised for the first time. Our results revealed that the strongest antiplatelet agents were garlic and shallot, whereas chives had the highest antioxidant activity. Leek and bunching onion had the weakest both biological activities. Significantly positive correlations were found between the in vitro antiplatelet activity and total organosulfur (R=0.74) and phenolic (TP) content (R=0.73), as well as between the antioxidant activity and TP (R=0.91) and total organosulfur content (R=0.67). Six individual phenolic compounds were associated with the antioxidant activity, with catechin, epigallocatechin and epicatechin gallate having the strongest correlation values (R>0.80). Overall, our results suggest that both organosulfur and phenolic compounds contribute similarly to Allium antiplatelet activity, whereas phenolics, as a whole, are largely responsible for antioxidant activity, with broad variation observed among the contributions of individual phenolic compounds.

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“…However, determination of antioxidant capacity of a particular sample cannot be performed accurately by any single assay [Ozyurek et al, 2011;Bernaert et al, 2012]. Consequently, at least two assays should be used in order to assess antioxidant capacity accurately Meng et al, 2011].…”

Section: Introductionmentioning

confidence: 99%

Antioxidant Capacity of a Turkish Traditional Alcoholic Drink, Raki

Yalcin¹

2016

Pol. J. Food Nutr. Sci.

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Raki is an aniseed fl avoured traditional Turkish alcoholic drink. Antioxidant capacity of raki samples from different commercial brands were evaluated by CUPRAC, DPPH, TEAC and ORAC assays and correlations between these assays and total phenolic content were also investigated. Additionally, the one-way ANOVA and Bonferroni tests were performed to compare differences between values of the samples. Results indicated that different raki samples exhibited different antioxidant capacity and total phenolic content. The mean antioxidant capacity values of samples were in the order of: ORAC>TEAC>CUPRAC>DPPH. The correlations of total phenolic content of samples with their CUPRAC, TEAC and ORAC results were found statistically signifi cant, while DPPH assay showed no signifi cant correlation.

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Antioxidant capacity, total phenolic and ascorbate content as a function of the genetic diversity of leek (Allium ampeloprasum var. porrum)

Cited by 87 publications

References 69 publications

Compartmentation and localization of bioactive metabolites in different organs of Allium roylei

Compartmentation and localization of bioactive metabolites in different organs of Allium roylei

Relationships among Bioactive Compounds Content and the Antiplatelet and Antioxidant Activities of Six Allium Vegetable Species

Antioxidant Capacity of a Turkish Traditional Alcoholic Drink, Raki

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