PT  - JOURNAL ARTICLE
AU  - Guidoni, Silvia
AU  - Allara, Pierpaolo
AU  - Schubert, Andrea
TI  - Effect of Cluster Thinning on Berry Skin Anthocyanin Composition of <em>Vitis vinifera</em> cv. Nebbiolo
AID  - 10.5344/ajev.2002.53.3.224
DP  - 2002 Jan 01
TA  - American Journal of Enology and Viticulture
PG  - 224--226
VI  - 53
IP  - 3
4099  - http://www.ajevonline.org/content/53/3/224.short
4100  - http://www.ajevonline.org/content/53/3/224.full
SO  - Am J Enol Vitic.2002 Jan 01; 53
AB  - Cluster thinning (removal of 50% of the cluster one month after bloom) was tested for three consecutive years in a vineyard located in southern Piedmont (Italy). At harvest, concentrations of total anthocyanins and flavonoids were assessed by spectrophotometry and concentrations of individual anthocyanins were determined by high-performance liquid chromatography. Berry weight and berry skin weight slightly increased following thinning. Soluble solids and berry skin anthocyanins and flavonoids were more concentrated in berries from cluster-thinned plants. Cluster thinning increased the concentrations of cyanidin-3-glucoside, peonidin-3-glucoside, and, to a lesser extent, petunidin-3-glucoside. Concentrations of malvidin-3-glucoside and of acylated anthocyanins were not affected by cluster thinning.