title: Impact of Cultivation Conditions, Ethylene Treatment, and Postharvest Storage on Selected Quality and Bioactivity Parameters of Kiwifruit "Hayward" Evaluated by Analytical and Chemometric Methods.
abstract: Organic, semiorganic, and conventional "Hayward" kiwifruits, treated with ethylene for 24 h and stored during 10 days, were assessed by UV spectrometry, fluorometry, and chemometrical analysis for changes in selected characteristics of quality (firmness, dry matter and soluble solid contents, pH, and acidity) and bioactivity (concentration of polyphenols via Folin-Ciocalteu and p-hydroxybenzoic acid assays). All of the monitored qualitative parameters and characteristics related to bioactivity were affected either by cultivation practices or by ethylene treatment and storage. Results obtained, supported by statistical evaluation (Friedman two-way ANOVA) and chemometric analysis, clearly proved that the most significant impact on the majority of the evaluated parameters of quality and bioactivity of "Hayward" kiwifruit had the ethylene treatment followed by the cultivation practices and the postharvest storage. Total concentration of polyphenols expressed via p-hydroxybenzoic acid assay exhibited the most significant sensitivity to all three evaluated parameters, reaching a 16.5% increase for fresh organic compared to a conventional control sample. As a result of postharvest storage coupled with ethylene treatment, the difference increased to 26.3%. Three-dimensional fluorescence showed differences in the position of the main peaks and their fluorescence intensity for conventional, semiorganic, and organic kiwifruits in comparison with ethylene nontreated samples.
authors.affiliation: Mokpo National University, Department of Horticultural Science, Muan, Jeonnam, South Korea.
authors.forename: Yong Seo
authors.initials: YS
authors.lastname: Park
authors.affiliation: National Agricultural and Food Centre VUP, Food Research Institute, SK-824 75 Bratislava, Slovak Republic.
authors.forename: Martin
authors.initials: M
authors.lastname: Polovka
authors.affiliation: Mokpo National University, Department of Food Engineering, Muan, Jeonnam, South Korea.
authors.forename: Kyung-Sik Ham
authors.initials: KS
authors.lastname: Ham
authors.affiliation: Mokpo National University, Department of Food Engineering, Muan, Jeonnam, South Korea.
authors.forename: Yang-Kyun
authors.initials: YK
authors.lastname: Park
authors.affiliation: Postharvest Technology Research Institute/Postharvest Technology Innovation Center, Chiang Mai, 50200, Thailand.
authors.forename: Suchada
authors.initials: S
authors.lastname: Vearasilp
authors.affiliation: Gdańsk University of Technology, Chemical Faculty, Department of Analytical Chemistry, Gdańsk 80 952, Poland.
authors.forename: Jacek
authors.initials: J
authors.lastname: Namieśnik
authors.affiliation: Universidad Del Bio-Bio, Department of Basic Sciences, P.O. Box 447, Chillan, 3780000, Chile.
authors.forename: Fernando
authors.initials: F
authors.lastname: Toledo
authors.affiliation: Universidad Del Bio-Bio, Department of Basic Sciences, P.O. Box 447, Chillan, 3780000, Chile.
authors.forename: Patricia
authors.initials: P
authors.lastname: Arancibia-Avila
authors.affiliation: The Institute for Drug Research, School of Pharmacy, The Hebrew University, Hadassah Medical School, Jerusalem 91120, Israel.
authors.forename: Shela
authors.initials: S
authors.lastname: Gorinstein
mesh_terms: D005030:Ethylenes / Q000737:chemistry*; D005470:Fluorometry; D061353:Food Storage; D005638:Fruit / Q000737:chemistry*; D062385:Hydroxybenzoates / Q000032:analysis*; D059808:Polyphenols / Q000032:analysis*; D011786:Quality Control
chemical_list: D005030:Ethylenes; D062385:Hydroxybenzoates; D059808:Polyphenols; C036216:ethylene