ISHS Acta Horticulturae 617: Workshop on Rootstocks' Performance in Phylloxera Infested Vineyards
SHORT AND LONG TERM EFFECTS OF THREE ROOTSTOCKS ON CABERNET SAUVIGNON VINE BEHAVIOUR AND WINE QUALITY |
| Authors: | N. Ollat, M. Lafontaine |
| Keywords: | Vitis vinifera, vegetative development, photosynthetic activity, yield, sugar, anthocyanins, glyco-conjugates. |
| Abstract:
Short and long term effects of ‘Riparia Gloire,’ ‘101-14 Mgt’ and ‘SO4’ rootstocks grafted with ‘Cabernet Sauvignon’ on vegetative and reproductive development, photosynthetic activity, must composition and wine quality were studied in the field. Apart from sugar and anthocyanin content of the berries, glycosylate secondary metabolite determination was performed using the G-G assay to evaluate potential quality of grapes and the quality of wines in 1999. Rootstocks modified shoot growth rate, but did not influence leaf photosynthetic capacity (at ambient CO2 concentration) in the absence of water deficits. Measurements over 25 years showed that biomass allocation between vegetative and reproductive parts, evaluated with the Ravaz index, was affected by rootstock. ‘Riparia Gloire’ induced a higher biomass allocation to grapes than to shoots. This rootstock also led to a higher degree of ripening in terms of sugar and anthocyanin contents and to higher quality wines. There were rootstock and soil effects on glycosylate secondary metabolite content in the berries at maturity. Red-free G-G (glyco-conjugates other than anthocyanins) appeared to be well correlated with potential grape and wine quality. | |
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