Restricted accessResearch articleFirst published online 2007-04
Low Molecular Weight Phenolic and Anthocyanin Composition of Grape Skins from cv. Syrah (Vitis vinifera L.) in the Maipo Valley (Chile): Effect of Clusters Thinning and Vineyard Yield
Changes in phenolic composition were determined in cv. Syrah-vines grape skins during ripening for two contrasting yields, resulting from cluster thinning at veraison. Treatments consisted on 16 and eight clusters per plant leading to approximately 8 ton/ha (T1) and 4 ton/ha (T2). In the grape skins of the samples analysed, 11 different low molecular weight phenolic compounds were identified, as well as 15 anthocyanins. Cluster thinning had a minimal effect on ripening time and weight of grape skins, however, clusters from low yield plants resulted in a lower total acidity and slightly higher pH. As for the phenylpropanoid pathway, the flavan-3-ol (+)-catechin, and the flavanols isorhamnetin-3-O-galactoside and isorhamnetin-3- O-glucoside, resulted in a higher concentration in berry skins from low yield plants. It is concluded that cluster thinning may result, from the oenological point of view, in an increased grape quality especially in compounds related to wine colour.
Boss P.K., Davies C. and Robinson S.P. (1996). Analysis of the expression of anthocyanin pathway genes in developing Vitis vinifera L., cv. Shiraz grape berries and the implications for pathway regulation. Plant Physiology111: 1059—1066.
2.
Bureau S., Raymond L. and Razungles A. (2000). Effect of vine or bunch shading on the glycosylated flavor precursors in grapes of Vitis vinifera L., c.v. Syrah. Journal of Agricultural and Food Chemistry48: 1290—1297.
3.
Coombe B.G. and McCarthy M.G. (2000). Dynamics of grape berry growth and physiology of ripening. Australian Journal of Grape and Wine Research6: 125—130.
4.
Degenhardt A., Hofmann S., Knapp H. and Winterhalter P. (2000). Journal of Agricultural and Food Chemistry48: 5812—5818.
5.
Dry P. ( 2000). Canopy managment for fruitfulness. Australian Journal of Grape and Wine Research6: 109—115.
6.
Düring H. and Davtyan A. (2002). Development changes of primary processes of photosynthesis in sun- and shadeadapted berries of two grapevine cultivars. Vitis41: 63—67.
7.
Escribano-Bailón T., Alvarez-García M., Rivas-Gonzalo J.C., Heredia F. and Santos-Buelga C. (2001). Color and stability of pigments rerived from the acetaldehyde-mediated condensation between malvidin 3-O-Glucoside and (+) - catechin. Journal of Agricultural and Food Chemistry49: 1213—1217.
8.
Ezzahouani A. and Williams L.E. (2003). Trellising, fruit thinning and defoliation have only small effects on the performance of `Ruby Seedless' grape in Morocco . The Journal of Horticultural Science and Biotechnology78(1): 79—83.
9.
Es-Safi N.E., Fulcrand H., Cheynier V. and Moutounet M. (1999). Competition between (+)-catechin and (—)- epicatechin in acetaldehyde-induced polymerization of flavanols. Journal of Agricultural and Food Chemistry47: 2088—2095.
10.
Famiani F., Walker R., Técsi L., Chen Z., Proietti P. and Leegood R. (2000). An immunohistochemical study of the compartmentation of metabolism during the development of grape (Vitis vinifera) berries. Journal of Experimental Botany51(345): 675—683.
11.
Flanzy C. (2000). Enología: Fundamentos científicos y enológicos . Madrid, Spain: Mundi Prensa Press .
12.
Gawel R. (1998). Red wine astringency: a review. Australian Journal of Grape and Wine Research4: 74—95.
13.
González-Neves G., Gil G. and Ferrer M. (2002). Effect of different vineyard treatments on the phenolic contents in tannat (Vitis vinifera L.) grapes and their respective wines. Food Science and Technology International5(8): 315—321.
14.
Haselgrove L., Botting D., van Heeswijck R., Hoj P.B., Dry P.R., Ford C. and Iland P.G. (2000). Canopy microclimate and berry composition: The effect of bunch exposure on the phenolic composition of Vitis vinifera L. cv Shiraz grape berries. Australian Journal of Grape and Wine Research6: 141—149.
15.
Heller W. and Forkmann G. (1996). Biosynthesis of flavonoids. In: Harborne J.B. (ed.), The Flavonoids, Advances in Research Since 1986. London, UK: Chapman and Hall.
16.
Mcdonald M.S., Hughes M., Burns J., Lean M.E.J., Matthews D. and Crozier A. (1998). Survey of the free and conjugated myricetin and quercetin content of red wines of different geographical origins. Journal of Agricultural and Food Chemistry46: 368—375.
17.
Ough C.S. and Nagaoka R. (1984). Effect of cluster thinning an vineyard yields on grape and winecomposition and wine quality of Cabernet Sauvignon. American Journal of Enology And Viticulture35(1): 30—34.
18.
Peña-Neira A., Hernández T., García-Vallejo C., Estrella I. and Suarez J.A. (2000). A survey of phenolic compounds in Spanish wines from different geographical origins. EuropeanFood Research and Technology210: 445—448.
19.
Peña-Neira A., Dueñas M., Duarte A., Hernández T., Estrella I. and Loyola E. (2004). Effects of ripening stages and of plant vegetative vigor on the phenolic composition of grapes (Vitis vinifera L.) cv. Cabernet Sauvignon in the Maipo Valley (Chile). Vitis43: 51—57.
20.
Petrie P., Trought C. and Howell S. (2000). Growth and dry matter partitioning of Pinot Noir (Vitis vinifera L.) in relation to leaf area and crop load. Australian Journal of Grape and Wine Research6: 40—45.
21.
Poni S. and Giachino E. (2000). Growth, photosynthesis and cropping of potted grapevines (Vitis vinifera L. cv. Cabernet Sauvignon) in relation with shoot trimming. Australian Journal of Grape and Wine Research6: 216—226.
22.
Riberéau-Gayon P., Dubourdieu D., Donèche B. and Lonvaud A. (1999). Handbook of Enology. The Microbiology of Wine and Vinifications. Handbook of EnologyChichester, UK:Wiley & Sons Ltd.
23.
Robinson S. and Davies C. (2000). Molecular biology of ripening. Australian Journal of Grape and Wine Research6: 175—188.
24.
Rogiers S., Hatfield J.M., Jaudzems G.,White R. and Keller M. (2004). Grape berry epicuticular wax and transpiration during ripening and preharvest weigh loss. American Journal of Enology And Viticulture55(2): 121—127.
25.
Schultz H.R., Weber M., Steinberg B., Augustin A., Himstedt M. and Pfeifer W. (2000). Teilentfruchtung zur Regulierung von Menge und Güte des Ertrages. II. Reaktion des Weinaromas. Das Deutsche Weinmagazin11: 28—33.
26.
Venencie C., Uveira M.N. and Guiet S. (1997). Maturité polyphénolique du raisin mise en place d'une méthode d'analyse de routine. Revue Francaise d'Oenologie167: 36—41.
27.
Zoecklein B., Fugelsang K., Gump B. and Nury F. ( 2001). Análisis y producción de vino. Zaragoza, España: Acribia.
