| Effects of bud load on quality of Beogradska besemena and Thompson seedless table grapes and cultivar differentiation based on chemometrics of analytical indices. | |
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MedLine Citation:
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PMID: 21969062 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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BACKGROUND: The effects of bud load on the quality of Beogradska besemena and Thompson seedless table grape cultivars were studied. Two pruning treatments were imposed: 44 and 18 buds per vine for Beogradska besemena and 44 and 22 buds per vine for Thompson seedless. RESULTS: In Beogradska besemena the reduction of bud load decreased titratable acidity (-4%), skin dry weight (-16%) and malic and citric acid contents (-43 and - 20%) and increased tartaric acid content (14%). The decrease in pulp antioxidant activity (-36%) was related to the decrease in hydroxycinnamoyl tartaric acid content (-13%). Concerning skin, the reduction of bud load decreased catechin and caffeoyl tartaric acid contents (-42 and - 40%) and significantly increased rutin and quercetin-3-O-glucopyranoside contents as specific compounds and flavonoids and proanthocyanidins (9 and 21%) as classes of compounds, thus causing an increase in antioxidant activity (6%). In Thompson seedless the reduction of bud load increased soluble solid content (7%), acidity (9%) and concentrations of the three organic acids (7, 3 and 14%). The increase in pulp antioxidant activity (25%) could be attributed to the increase in total phenolics (69%). The reduction of bud load caused a significant decrease in quercetin-3-O-glucopyranoside (-26%) and antioxidant activity (-15%) in skin. Principal component analysis allowed good separation between samples of the two cultivars, independently of bud level. CONCLUSION: The results indicate that the effects of different bud loads are cultivar-dependent. Bud load and genotype differences were shown to dramatically impact the quality and antioxidant properties of table grape. Copyright © 2011 Society of Chemical Industry. |
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Authors:
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Antonietta Baiano; Carmela Terracone |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-10-3 |
Journal Detail:
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Title: Journal of the science of food and agriculture Volume: - ISSN: 1097-0010 ISO Abbreviation: - Publication Date: 2011 Oct |
Date Detail:
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Created Date: 2011-10-4 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0376334 Medline TA: J Sci Food Agric Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Society of Chemical Industry. |
Affiliation:
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Department of Food Science, University of Foggia, Via Napoli 25, I-71100 Foggia, Italy; Istituto per la Ricerca e le Applicazioni Biotecnologiche per la Sicurezza e la Valorizzazione dei Prodotti Tipici e di Qualità, University of Foggia, Via Napoli 25, I-71100 Foggia, Italy. a.baiano@unifg.it. |
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