The influence exerted by bunch microclimate on some C-13-norisoprenoid precursors content was investigated for the first time in Nebbiolo grapes during ripening. Samples were collected, during two consecutive seasons, from two vineyards, which are characterized by different microclimatic conditions caused by vine vigour heterogeneity and different vineyard aspects. Enzymatic hydrolysis of the glycosides extracted from the grapes, and subsequent GC-MS determination of the aglycones, highlighted that the majority of norisoprenoid glycosides accumulated in Nebbiolo berries from pre-veraison until 3-4 weeks post-veraison. Vineyard aspect and vine vigour affected the timing of the maximum concentration of norisoprenoid precursors and their subsequent decrease at harvest. Low light in the vigorous blocks penalized norisoprenoids peak concentration. In the south less vigorous blocks, a decline of total norisoprenoids content during the pre-harvest period was observed. This decline appeared mainly regulated by the temperature. Vintage and/or microclimatic conditions affected the final content of some important norisoprenoids

Grape aroma precursors in cv. Nebbiolo as affected by vine microclimate

ASPROUDI, ANDRIANI;PETROZZIELLO, MAURIZIO;CAVALLETTO, Silvia;GUIDONI, Silvia
Last
2016

Abstract

The influence exerted by bunch microclimate on some C-13-norisoprenoid precursors content was investigated for the first time in Nebbiolo grapes during ripening. Samples were collected, during two consecutive seasons, from two vineyards, which are characterized by different microclimatic conditions caused by vine vigour heterogeneity and different vineyard aspects. Enzymatic hydrolysis of the glycosides extracted from the grapes, and subsequent GC-MS determination of the aglycones, highlighted that the majority of norisoprenoid glycosides accumulated in Nebbiolo berries from pre-veraison until 3-4 weeks post-veraison. Vineyard aspect and vine vigour affected the timing of the maximum concentration of norisoprenoid precursors and their subsequent decrease at harvest. Low light in the vigorous blocks penalized norisoprenoids peak concentration. In the south less vigorous blocks, a decline of total norisoprenoids content during the pre-harvest period was observed. This decline appeared mainly regulated by the temperature. Vintage and/or microclimatic conditions affected the final content of some important norisoprenoids
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http://www.sciencedirect.com/science/article/pii/S0308814616307506
Vitis vinifera; Nebbiolo; C-13-norisoprenoids; Ripening; Vineyard aspect; Vine vigour; FLAVOR PRECURSORS; BERRY SKINS; ANTHOCYANIN; CAROTENOIDS; TEMPERATURE
Asproudi, Andriani; Petrozziello, M; Cavalletto, S; Guidoni, S
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2318/1597403
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