Abstrakt
Jujube (Ziziphus jujuba Mill.) fruit is an important medicinal plant in Turkey. Several characteristics of jujube fruit harvested at four maturation stages were evaluated. The maturation stages were classified by degree (%) of dark color formation on the fruit surface [Stage (S1), 1–10% (S2), 11–50% (S3), 51–100% (S4)]. Fruit weight, width, length, stone weight, flesh/stone ratio, total soluble solids (TSS), titratable acidity (TA), organic acids and specific sugars were determined. Total phenolic content (TPC) was measured along with antioxidant activity (AOC), determined by Ferric Reducing Ability of Plasma (FRAP) and Trolox Equivalent Antioxidant Capacity (TEAC). Results of the study showed that TSS increased from 12.8% to 18.3% from the S1 to the S4 fruit stage, respectively. The S3 had the highest TPC (6518 mg GAE·kg fw). The highest AOC were recovered from S2 (TEAC; 74.4 μmol TE·g fw, FRAP; 50.9 μmol TE·g fw), followed by
S3 (TEAC; 63.6 μmol TE·g fw, FRAP; 37.6 μmol TE·g fw). The main organic acid was citric acid as determined by the HPLC method. Fructose content tended to be more stable than glucose or sucrose.
Bibliografia
Antonio A.M., Druse M.J., 2008. Antioxidants prevent ethanol-associated apoptosis in fetal rhomb encephalic neurons. Brain. Res. 14, 16–23.
Bartolome A.P., Ruperez P., Fuster C., 1995. Pineapple fruit: morphological characteristics, chemical composition and sensory analysis of Red Spanish and Smooth Cayenne cultivars. Food Chem. 53, 75–79.
Beadury R.M., 1992. Blueberry quality characteristics and how can they be optimized. Ann. Rpt. Mich. Stt. Hort. Soc. 122, 140–145.
Benzie I.F.F., Strain J.J., 1996. The ferric reducing ability of plasma (FRAP) as a measure of “Antioxidant Power”: The FRAP assay. Anal. Biochem. 239, 70–76.
Celik H., Ozgen M., Serce S., Kaya C., 2008. Phytochemical accumulation and antioxidant capacity at four maturity stages of cranberry fruit. Sci. Hort.117, 345–348.
Connor A.M., Luby J.J., Hancock J.F., Berkheimer S., Hanson E.J., 2002. Changes in fruit antioxidant activity among blueberry cultivars during cold-temperature storage J. Agric. Food Chem. 50, 893–898.
Ecevit F.M., San B., Unal T.D., Turk F.H., Yildirim A.N., Polat M., Yildirim F., 2008. Selection of superior ber (Ziziphus jujube L.) genotypes in Civril Region. Ankara Univ. Agric. Sci. 14, 51–58.
Ercisli S., Orhan E., Ozdemir O., Sengul M., 2007. The genotypic effects on the chemical composition and antioxidant activity of sea buckthorn (Hippophae rhamnoides L.) berries grown in Turkey. Sci. Hortic. 115, 27–33.
Gültekin H.C., 2007. An unknown fruit (jujube). Pop. Sci. J. 11, 41–43.
Kader A.A., 1999. Fruit maturity, ripening, and quality relationships. Acta Hort. 485, 203–208.
Kalt W., 2005. Effects of production and processing factors on major fruit and vegetable antioxidants. J. Food Sci. 70, 11–19.
Kamiloğlu Ö., Ercisli S., Sengul M., Toplu C., Serçe S., 2009. Total phenolics and antioxidant activity of jujube (Zizyphus jujube Mill.) genotypes selected from Turkey. Afr. J. Biotech. 8, 303–307.
Kirkbride J.H., Wiersema J.H., Turland N.J., 2006. Proposal to converse the name Ziziphus jujube against Z. zizyphus (Rhamnaceae). Taxon 5, 1027–1052.
Li J.W., Fan L.P., Ding S.D., Ding S.L., 2007. Nutritional composition of five cultivars of Chinese jujube. Food Chem. 103, 454–460.
Mainland C.M., Tucker J.W., Hepp R.F., 2002. Blueberry health information – some new mostly review. Acta Hort. 574, 39–43.
Özgen M., Reese R.N., Tulio A.Z., Miller A.R., Scheerens J.C., 2006. Modified 2,2-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS) method to measure antioxidant capacity of selected small fruits and comparison to ferric reducing antioxidant power (FRAP) and 2,2’-Diphenyl-1-picrylhydrazyl (DPPH) methods. J. Agric. Food Chem. 54, 1151–1157.
Özgen M., Wyzgoski F.J., Tulio A.Z., Gazula A., Miller A.R., Scheerens J.C., Reese R.N., Wright S.R., 2008. Antioxidant capacity and phenolic antioxidants of Midwestern black raspberries grown for direct markets are influenced by production site. Hortscience 43(7), 2039–2047.
Özgen M., Serçe S., Kaya C., 2009a. Phytochemical and antioxidant properties of anthocyaninrich Morus nigra and Morus rubra fruits. Sci. Hortic. 119, 275–279.
Özgen M., Torun A.A., Ercisli S., Serçe, S., 2009b. Changes in chemical composition, antioxidant activities and total phenolic content of Arbutus andrachne fruit at different maturation stages. Ital. J. Food Sci. 21,65–72.
Pawlowska A.M., Camangi F., Bader A., Braca A., 2009. Flavonoids of zizyphus Zizyphus jujuba (L.) and zizyphus Zizyphus spina-christi (L.) wild (Rhamnaceae) fruits. Food Chem. 112, 858–862.
Perkins-Veazie P.M., Collins J.K., 1993. Quality evaluation and postharvest procedures for small fruits. USDA-ARS South Central Agricultural Research Lab., Lane, OK.
Prior R.L., Cao G.H., Martin A., Sofic E., Mcewen J., O’brien C., Lischner N., Ehlenfeldt M., Kalt W., Krewer G., Mainland M., 1998. Antioxidant capacity as influenced by total phenolic and anthocyanin content, maturity, and variety of Vaccinium species. J. Agric. Food Chem. 46, 2686–2693.
Prior R.L., 2003. Absorption and metabolism of anthocyanins: Potential health effects. In: Phytochemicals: Mechanisms of action. Boca Raton, Fla., CRC Press, Inc.
Sacks E., Shaw D.V., 1994. Optimum allocation of objective color measurement for evaluating fresh strawberries. J. Amer. Soc. Hort. Sci. 119, 330–334.
SAS Institute. SAS Online Doc, Version 8. SAS Inst., Cary, NC, 2005, USA.
Shui G.H., Leong L.P., 2002. Separation and determination of organic acids and phenolic compounds in fruit juices and drinks by high-performance liquid chromatography. J. Chromat. 977, 89–96.
Singleton V.L., Rossi J.L., 1965. Colorimetry of total phenolics with phosphomolybdicphosphotungstic acid reagents. Amer. J. Enol. Viticult. 16, 144–158.
Sun Y.F., Liang Z.S., Shan C.J., Viernstein H., Unger F., 2011. Comprehensive evaluation of natural antioxidants and antioxidant potentials in Ziziphus jujuba Mill. var. spinosa (Bunge) Hu ex H.F. Chou fruits based on geographical origin by TOPSIS method. Food Chem. 124, 1612–1619.
Wang C., Cheng D., Cao J., Jiang W., 2013 Antioxidant capacity and chemical constituents of Chinese jujube (Ziziphus jujuba Mill.) at different ripening stages. Food Sci. Biotech. 22(3), 639–644.
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