Phytochemical Profiles, Antioxidant and Antibacterial Activities of Grape (Vitis vinifera L.) Seeds and Skin from Organic and Conventional Vineyards

Radulescu, Cristiana; Buruleanu, Lavinia Claudia; Nicolescu, Cristina Mihaela; Olteanu, Radu Lucian; Bumbac, Marius; Holban, Georgeta Carmen; Simal-Gandara, Jesus

doi:10.3390/plants9111470

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Phytochemical Profiles, Antioxidant and Antibacterial Activities of Grape (Vitis vinifera L.) Seeds and Skin from Organic and Conventional Vineyards

Cristiana Radulescu

^1,2,*,†

Lavinia Claudia Buruleanu

^3,*,†,

Cristina Mihaela Nicolescu

^2,*,†

Radu Lucian Olteanu

^2,*,†,

Marius Bumbac

^1,2,*,†

Georgeta Carmen Holban

⁴ and

Jesus Simal-Gandara

^5,*

Faculty of Sciences and Arts, Valahia University of Targoviste, 130004 Targoviste, Romania

Institute of Multidisciplinary Research for Science and Technology, Valahia University of Targoviste, 130004 Targoviste, Romania

Faculty of Environmental Engineering and Food Science, Valahia University of Targoviste, 130004 Targoviste, Romania

⁴

Doctoral School, University of Agronomic Sciences and Veterinary Medicine of Bucharest, 011464 Bucharest, Romania

⁵

Nutrition and Bromatology Group, Department of Analytical Chemistry and Food Science, Faculty of Food Science and Technology, University of Vigo—Ourense Campus, E-32004 Ourense, Spain

Authors to whom correspondence should be addressed.

^†

These authors contributed equally to this work.

Plants 2020, 9(11), 1470; https://doi.org/10.3390/plants9111470

Received: 28 September 2020 / Revised: 28 October 2020 / Accepted: 30 October 2020 / Published: 30 October 2020

(This article belongs to the Special Issue Natural Compounds–Successful Solutions for the Medical Challenges of the 21st Century)

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Abstract

The therapeutic benefits of extracts obtained from different red grape fractions were thoroughly studied, however, data regarding the comparison of phytochemical extracts prepared from the same varieties coming from organic versus conventional management systems are rather lacking. The present study aimed at comparing some of the phytochemical characteristics and antimicrobial activity of hydroalcoholic (50% v/v) extracts obtained from four varieties of red grapes cultivated respectively in organic and conventional vineyards. Total flavonoid content, total phenolic compounds, and antioxidant activity were determined by molecular absorption spectroscopy. Antimicrobial activity of the studied extracts was evaluated against common bacterial strains isolated from different habitats according to specific lab procedures. The analyses were performed in solid broths by applying the disk diffusion method, which allowed for the simultaneous determination of the spectrum of the sensitivity of the tested bacteria as well as the values of the minimum inhibition concentration (MIC). It was found that favorable antagonistic activities against the tested bacteria strains were exhibited by the hydroalcoholic extracts from the seeds of the organic varieties, respectively the skin of the conventional varieties. View Full-Text

Keywords: red grape extract; organic/conventional vineyard; phenolycs; flavonoids; antioxidant activity; antimicrobial activity; statistical analysis

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MDPI and ACS Style

Radulescu, C.; Buruleanu, L.C.; Nicolescu, C.M.; Olteanu, R.L.; Bumbac, M.; Holban, G.C.; Simal-Gandara, J. Phytochemical Profiles, Antioxidant and Antibacterial Activities of Grape (Vitis vinifera L.) Seeds and Skin from Organic and Conventional Vineyards. Plants 2020, 9, 1470. https://doi.org/10.3390/plants9111470

AMA Style

Radulescu C, Buruleanu LC, Nicolescu CM, Olteanu RL, Bumbac M, Holban GC, Simal-Gandara J. Phytochemical Profiles, Antioxidant and Antibacterial Activities of Grape (Vitis vinifera L.) Seeds and Skin from Organic and Conventional Vineyards. Plants. 2020; 9(11):1470. https://doi.org/10.3390/plants9111470

Chicago/Turabian Style

Radulescu, Cristiana, Lavinia C. Buruleanu, Cristina M. Nicolescu, Radu L. Olteanu, Marius Bumbac, Georgeta C. Holban, and Jesus Simal-Gandara. 2020. "Phytochemical Profiles, Antioxidant and Antibacterial Activities of Grape (Vitis vinifera L.) Seeds and Skin from Organic and Conventional Vineyards" Plants 9, no. 11: 1470. https://doi.org/10.3390/plants9111470

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Phytochemical Profiles, Antioxidant and Antibacterial Activities of Grape (Vitis vinifera L.) Seeds and Skin from Organic and Conventional Vineyards

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