A better understanding of the complex relations among grape phenolic maturity and cultural and environmental factors may strongly contribute to the improvement of red wine quality. In order to investigate this matter, a trial was set comparing the agronomic behavior and grape composition, with particular regards to phenolic compounds, of three selections of the cv. Nebbiolo when grown in different environmental situations. Vines of three Nebbiolo clones, registered as CVT 63, CVT 308 and CVT 415, were planted in three different locations of Piedmont Region (North-west Italy): La Morra, Neive and Lessona. These areas differ in terms of climate, soil texture and row exposition and sloping. Agronomic and grape qualitative performances were assessed over three growing seasons. The clone CVT 63 showed a higher yield on the clay and calcareous soil of La Morra than when grown on sandy and acidic soil of Lessona. The grape juice quality was very similar in the two locations. The environmental imprint however was very evident on grape phenolic composition. The amount of anthocyanins was high in the grapes of both sites, however the profile was quite different. Regarding the clones CVT 308 e CVT 415, their agronomic performances differed very much according to the environment. In Neive the higher yield negatively influenced grape composition which resulted lower in sugar and in the amount of total anthocyanins and flavonoids. Confirming the results obtained in La Morra and Lessona with the CVT 63 selection, the anthocyanins profiles obtained in Lessona were again characterized by an higher % of cyaniding-3-glucoside and peonifin-3-glucoside and a lower % of malvidin-3-glucoside. We may conclude that the anthocyanin profile of Nebbiolo grape is strongly influenced by the environment of cultivation with the consequent impact on the evolution of the color of the wines. Our results confirmed the environmental imprinting in the final characters of wines.
Environmental influence on grape phenolic and aromatic compounds in a Nebbiolo selection (Vitis vinifera L.)
Mannini F;Santini D;Mollo A
2016
Abstract
A better understanding of the complex relations among grape phenolic maturity and cultural and environmental factors may strongly contribute to the improvement of red wine quality. In order to investigate this matter, a trial was set comparing the agronomic behavior and grape composition, with particular regards to phenolic compounds, of three selections of the cv. Nebbiolo when grown in different environmental situations. Vines of three Nebbiolo clones, registered as CVT 63, CVT 308 and CVT 415, were planted in three different locations of Piedmont Region (North-west Italy): La Morra, Neive and Lessona. These areas differ in terms of climate, soil texture and row exposition and sloping. Agronomic and grape qualitative performances were assessed over three growing seasons. The clone CVT 63 showed a higher yield on the clay and calcareous soil of La Morra than when grown on sandy and acidic soil of Lessona. The grape juice quality was very similar in the two locations. The environmental imprint however was very evident on grape phenolic composition. The amount of anthocyanins was high in the grapes of both sites, however the profile was quite different. Regarding the clones CVT 308 e CVT 415, their agronomic performances differed very much according to the environment. In Neive the higher yield negatively influenced grape composition which resulted lower in sugar and in the amount of total anthocyanins and flavonoids. Confirming the results obtained in La Morra and Lessona with the CVT 63 selection, the anthocyanins profiles obtained in Lessona were again characterized by an higher % of cyaniding-3-glucoside and peonifin-3-glucoside and a lower % of malvidin-3-glucoside. We may conclude that the anthocyanin profile of Nebbiolo grape is strongly influenced by the environment of cultivation with the consequent impact on the evolution of the color of the wines. Our results confirmed the environmental imprinting in the final characters of wines.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
