Preprint Article Version 1 This version is not peer-reviewed

Proximate Polyphenolic Composition, Phytochemical Components and Bioactivity Evaluation of Twelve Strawberry (Arbutus unedo L.) Genotypes Grown Under Moroccan Ecological Conditions

Version 1 : Received: 12 July 2020 / Approved: 14 July 2020 / Online: 14 July 2020 (13:41:53 CEST)

How to cite: ZITOUNI, H.; HSSAINI, L.; OURRADI, H.; MESSAOUDI, Z.; MANUEL, V.; HERNANDEZ, F.; HANINE, H. Proximate Polyphenolic Composition, Phytochemical Components and Bioactivity Evaluation of Twelve Strawberry (Arbutus unedo L.) Genotypes Grown Under Moroccan Ecological Conditions. Preprints 2020, 2020070312 (doi: 10.20944/preprints202007.0312.v1). ZITOUNI, H.; HSSAINI, L.; OURRADI, H.; MESSAOUDI, Z.; MANUEL, V.; HERNANDEZ, F.; HANINE, H. Proximate Polyphenolic Composition, Phytochemical Components and Bioactivity Evaluation of Twelve Strawberry (Arbutus unedo L.) Genotypes Grown Under Moroccan Ecological Conditions. Preprints 2020, 2020070312 (doi: 10.20944/preprints202007.0312.v1).

Abstract

There are not many exhaustive works emphasizing the amount of genetic diversity among the strawberry tree (Arbutus unedo L.) genotypes in Morocco. This work aims to assess the biochemical composition of strawberry tree fruits, as well as to establish the variation of this composition among them. In this study, total phenols, total flavonoids, condensed and hydrolyzable tannins, total anthocyanins and free radical scavenging activity through ABTS were investigated in strawberry tree fruits. Furthermore, qualitative and quantitative analyses of individual phenolic compounds by high-performance liquid chromatography (HPLC) were carried out. Color parameters such as lightness (L*), Chroma (c*) and hue angle (h°) were also investigated. All studied variables showed highly significant differences among all samples with the exception of hydrolyzable tannins and chromatic coordinates. Total phenolics varied from 22.63 ± 1.74 to 39.06 ± 2.44 mg GAE/g dry wt, total flavonoids varied from 3.30 ± 0.60 to 8.62 ± 1.10 mg RE/g dry wt and total anthocyanins ranged between 0.12 ± 0.06 and 0.66 ± 0.15 mg cya-3-glu/100g dry wt. In addition, condensed and hydrolyzable tannins amounts were in the range of 10.41 ± 1.07 - 16.08 ± 1.50 mg TAE/g dry wt and 4.08 ± 2.43 - 6.34 ± 3.47 respectively. Moreover, the IC50 value (ABTS) ranged between 1.75 and 19.58 mg AAE/g dry wt. 17 phenolic compounds were detected in strawberry tree fruits. Gallocatechol and catechin were the most abundant phenolic compound. Matrix of correlations revealed significant positive and negative correlations among variables particularly c*, a* and b*. Principal component analysis showed that the first three components formed than 68% of the total inertia. The following variables gallic acid, protocatechuic, gallocatechin, gallic acid derivative, chlorogenic acid, syringic acid, ellagic acid derivative II, L* and h* were the most involved in the total variance explained. Hierarchical clustering classified samples into one main cluster, with a single branch. The results highlight a high biochemical diversity within studied strawberry genotypes, which is probably more genetically related

Subject Areas

Arbutus unedo L; biochemical assessment; antioxidant capacity; phenolic compounds; Morocco

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our diversity statement.

Leave a public comment
Send a private comment to the author(s)
Views 0
Downloads 0
Comments 0
Metrics 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.