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Article

Influence of the Maturity Stage on the Phytochemical Composition and the Antioxidant Activity of Four Andean Blackberry Cultivars (Rubus glaucus Benth) from Ecuador

1
Department of Nutrition and Quality, National Institute of Agricultural Research (INIAP), Panamericana Sur Km. 1, Mejía 170516, Ecuador
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Facultad de Ciencia Químicas, Universidad Central del Ecuador (UCE), Av. Universitaria, Quito 170129, Av. Pichincha, Ecuador
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Facultad de Ciencias Pecuarias, Ingeniería en Alimentos, Universidad Técnica Estatal de Quevedo, Km 7 1/2 vía Quevedo-El Empalme, Los Ríos 120313, Ecuador
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Canadian Executive Service Organization (CESO), Toronto, ON M5G 1Z6, Canada
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Facultad de Ciencia e Ingeniería en Alimentos y Biotecnología, Universidad Técnica de Ambato (UTA), Av. Los Chasquis y Río Payamino, Ambato 180103, Ecuador
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Departamento de Agronomía, Biotecnología y Alimentación, Universidad Pública de Navarra (UPNA), Edificio Los Olivos, Campus Arrosadia, 31006 Pamplona, Spain
*
Author to whom correspondence should be addressed.
Plants 2020, 9(8), 1027; https://doi.org/10.3390/plants9081027
Received: 12 July 2020 / Revised: 30 July 2020 / Accepted: 4 August 2020 / Published: 13 August 2020
(This article belongs to the Special Issue Mechanisms of Plant Antioxidants Action)
Andean blackberries (Rubus glaucus Benth) are fruits rich in phytocomponents with high antioxidant activity. In this work, the changes in the total polyphenol content (TPC), the total flavonoid content (TFC), and the total anthocyanin content (TAC) of four blackberry varieties at three maturity stages (E1-25%, E2-50%, and E3-100%) were measured. The antioxidant activity (AA) was evaluated using the 2,2’azinobis-(3-ethylbenzthiazolin 6-sulphonic acid (ABTS) and ferric reducing antioxidant power (FRAP) methods. TPC and TFC content decreased with the increase in the maturity stage. The blackberry Brazos cultivar presented TPC values of 51.26, 38.16, and 31.59 mg of gallic acid equivalents (GAE)/g dry weight (DW) at E1, E2, and E3, respectively. The TAC and soluble solids increased with the increase in the maturity stage of the fruits. The Andimora variety at E3 presented a high TPC content, and the Colombiana variety presented a high TFC content. The blackberry Colombiana cultivar presented TAC values of 1.40, 2.95, and 12.26 mg cy-3-glu/100g DW at E1, E2, and E3, respectively. The blackberry Colombiana cultivar presented a high AA value at 1278.63 µmol TE/g DW according to the ABTS method and 1284.55 µmol TE/g DW according to the FRAP method. The TPC and TFC showed a high correlation with the AA according to the ABTS and the FRAP methods. The Pearson correlation between the TFC and AA/ABTS has a value of r = 0.92. The TFC and AA/FRAP present a value of r = 0.94. View Full-Text
Keywords: Rubus glaucus Benth; blackberry; maturity stage; polyphenols; flavonoids; anthocyanins; antioxidant activity Rubus glaucus Benth; blackberry; maturity stage; polyphenols; flavonoids; anthocyanins; antioxidant activity
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MDPI and ACS Style

Samaniego, I.; Brito, B.; Viera, W.; Cabrera, A.; Llerena, W.; Kannangara, T.; Vilcacundo, R.; Angós, I.; Carrillo, W. Influence of the Maturity Stage on the Phytochemical Composition and the Antioxidant Activity of Four Andean Blackberry Cultivars (Rubus glaucus Benth) from Ecuador. Plants 2020, 9, 1027. https://doi.org/10.3390/plants9081027

AMA Style

Samaniego I, Brito B, Viera W, Cabrera A, Llerena W, Kannangara T, Vilcacundo R, Angós I, Carrillo W. Influence of the Maturity Stage on the Phytochemical Composition and the Antioxidant Activity of Four Andean Blackberry Cultivars (Rubus glaucus Benth) from Ecuador. Plants. 2020; 9(8):1027. https://doi.org/10.3390/plants9081027

Chicago/Turabian Style

Samaniego, Iván, Beatriz Brito, William Viera, Ana Cabrera, Wilma Llerena, Tissa Kannangara, Rubén Vilcacundo, Ignacio Angós, and Wilman Carrillo. 2020. "Influence of the Maturity Stage on the Phytochemical Composition and the Antioxidant Activity of Four Andean Blackberry Cultivars (Rubus glaucus Benth) from Ecuador" Plants 9, no. 8: 1027. https://doi.org/10.3390/plants9081027

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