Variation of Bioactive Compounds and Antioxidant Activity of Jujube (Ziziphus jujuba) Fruits at Different Stages of Ripening

  • Sina COSMULESCU University of Craiova, Horticulture Faculty, Department of Horticulture & Food Science, 13 A.I. Cuza Street, 200585 Craiova
  • Ion TRANDAFIR University of Craiova, Sciences Faculty, Department of Chemistry, 107 Calea Bucuresti, 200529 Craiova
  • Violeta NOUR University of Craiova, Horticulture Faculty, Department of Horticulture & Food Science, 13 A.I. Cuza Street, 200585 Craiova
  • Gheorghe ACHIM University of Craiova, Horticulture Faculty, Department of Horticulture & Food Science, 13 A.I. Cuza Street, 200585 Craiova
  • Mihai BOTU University of Craiova, Horticulture Faculty, Department of Horticulture & Food Science, 13 A.I. Cuza Street, 200585 Craiova
  • Olimpia IORDANESCU Banat’s University of Agricultural Sciences and Veterinary Medicine, Faculty of Horticulture, 119 Calea Aradului, 300645 Timisoara

Abstract

Fruits of two jujube (Ziziphus jujuba Mill.) cultivars were collected at four stages of ripening and analyzed in terms of chemical compounds. The cultivars were grown under the climatic conditions of the Sub-Carpathian area Ramnicu-Valcea in Romania (45°6′17″N, 24°22′32″E). Total phenols content, total flavonoids content, organic acids from jujube fruits and related antioxidant activities were investigated during the ripening stages. The antioxidant activity of alcoholic extracts was investigated by the 2,2'-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging method. Total phenolic content was determined by using the Folin-Ciocalteu assay, while determination of flavonoids was done by aluminium nitrate colorimetric method, and organic acids were separated by reversed phase chromatography. The results obtained have indicated significant differences (p < 0.05) found in bioactive compounds and antioxidant activity, depending on cultivars and ripening stage. Total phenolic content ranged from 1634.44 to 472.38 mg GAE/100 g in methanolic extracts of the two varieties studied, while total flavonoids content ranged from 19.9 to 48.5 mg QE/100 g. As regards the influence of ripening stage, the results show that the highest antioxidant activity was recorded in the stage of white maturity. The impact of maturity stage was significant on organic acid distribution of jujube extracts, and ascorbic acid is the major organic acid found in jujube fruits, followed by malic acid and lactic acid. Jujube fruits are rich in bioactive compounds and can be a complement in human’s healthy eating.

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Published
2018-01-01
How to Cite
COSMULESCU, S., TRANDAFIR, I., NOUR, V., ACHIM, G., BOTU, M., & IORDANESCU, O. (2018). Variation of Bioactive Compounds and Antioxidant Activity of Jujube (Ziziphus jujuba) Fruits at Different Stages of Ripening. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 46(1), 134-137. https://doi.org/10.15835/nbha46110752
Section
Research Articles