Berry size and qualitative characteristics of Vitis vinifera L. cv. Syrah

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dc.contributor.authorBarbagallo M.G.
dc.contributor.authorGuidoni S.
dc.contributor.authorHunter J.J.
dc.date.accessioned2011-10-13T16:58:24Z
dc.date.available2011-10-13T16:58:24Z
dc.date.issued2011
dc.description.abstractThe effect of variation in berry size on berry composition was studied in irrigated Syrah/R99 grapevines, located in a temperate area of South Africa. Berries from 45 clusters, sampled from both sides of the canopy (east and west), were weighed to create four categories: 1. less or equal to 1.5 g; 2. between 1.51 g and 2.00 g; 3. between 2.01 g and 2.50 g; 4. more than 2.50 g. Berry physical characteristics were determined and total anthocyanins and seed favonoids were analysed by spectrophotometry and anthocyanin profles by HPLC. The ratio of skin weight:berry weight did not change with increasing berry size, but the ratio of seed weight:berry weight increased. For total anthocyanins, varying results were obtained if values were expressed in mg/berry, mg/g skin, mg/kg grape and mg/cm2 skin. The quantity of total anthocyanins changed positively with increasing berry weight if expressed in mg/berry and remained almost similar if expressed in mg/cm2 of skin. In contrast, total polyph Enols decreased with berry weight if the values were expressed in mg/kg grape and in mg/g skin. Total anthocyanins expressed in mg/kg grape and in mg/g skin were correlated positively to the number of berries as well as to the total skin surface in one kilogram of grape. In this study, the largest berries seemed to have lower quality characteristics. In order to obtain better wine quality, it seems important to reduce berry weight and, in general, berry size variability of Syrah. The obtainment and continuity of a particular wine style may be affected by berry variability.
dc.description.versionArticle
dc.identifier.citationSouth African Journal of Enology and Viticulture
dc.identifier.citation32
dc.identifier.citation1
dc.identifier.citationhttp://www.scopus.com/inward/record.url?eid=2-s2.0-79958854574&partnerID=40&md5=6b40de975e43e0ffad8d80394a34cc6c
dc.identifier.issn0253939X
dc.identifier.urihttp://hdl.handle.net/10019.1/16710
dc.subjectAnthocyanins
dc.subjectBerry size variability
dc.subjectBerry weight
dc.subjectSeed number
dc.subjectSeed weight
dc.subjectSkin weight
dc.subjectVitis vinifera
dc.titleBerry size and qualitative characteristics of Vitis vinifera L. cv. Syrah
dc.typeArticle
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