Effects of severity of post-flowering leaf removal on berry growth and composition of three red Vitis vinifera L. cultivars grown under semiarid conditions

dc.contributor.author	Kotseridis, Y	en
dc.contributor.author	Georgiadou, A	en
dc.contributor.author	Tikos, P	en
dc.contributor.author	Kallithraka, S	en
dc.contributor.author	Koundouras, S	en
dc.date.accessioned	2014-06-06T06:51:46Z
dc.date.available	2014-06-06T06:51:46Z
dc.date.issued	2012	en
dc.identifier.issn	00218561	en
dc.identifier.uri	http://dx.doi.org/10.1021/jf300605j	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/5679
dc.subject	cluster microclimate	en
dc.subject	lateral shoots	en
dc.subject	leaf removal	en
dc.subject	seed flavan-3-ols	en
dc.subject	skin anthocyanins	en
dc.subject.other	Berry size	en
dc.subject.other	Cabernet-Sauvignon	en
dc.subject.other	cluster microclimate	en
dc.subject.other	Epicatechin	en
dc.subject.other	Flavan-3-ols	en
dc.subject.other	Fresh weight	en
dc.subject.other	Lateral shoots	en
dc.subject.other	Leaf removal	en
dc.subject.other	Northern Greece	en
dc.subject.other	Phenolic composition	en
dc.subject.other	Phenolic content	en
dc.subject.other	Seed mass	en
dc.subject.other	Semi-arid conditions	en
dc.subject.other	Soluble solids	en
dc.subject.other	Titratable acidity	en
dc.subject.other	Total leaf area	en
dc.subject.other	Vitis vinifera	en
dc.subject.other	Anthocyanins	en
dc.subject.other	Forestry	en
dc.subject.other	Phenols	en
dc.subject.other	Wine	en
dc.subject.other	Fruits	en
dc.subject.other	Vitaceae	en
dc.subject.other	Vitis vinifera	en
dc.title	Effects of severity of post-flowering leaf removal on berry growth and composition of three red Vitis vinifera L. cultivars grown under semiarid conditions	en
heal.type	journalArticle	en
heal.identifier.primary	10.1021/jf300605j	en
heal.publicationDate	2012	en
heal.abstract	The effects of the severity of post-flowering leaf removal on the growth and phenolic composition of berry skin and seeds were studied in three Vitis vinifera L. genotypes over two consecutive seasons, 2007 and 2008. The study was conducted in a commercial vertical shoot positioned (VSP)-trained nonirrigated vineyard of northern Greece, planted with cultivars Merlot, Cabernet Sauvignon, and Sangiovese. Three different severities of leaf removal in the fruit zone were applied manually at berry set: nondefoliated (ND), removal of the lateral shoots of the first six basal nodes (LR), and full removal of the total leaf area (main leaves and lateral shoots) of the first six basal nodes (FR). Grape samples were obtained at commercial harvest. Leaf removal decreased yield per vine and cluster weight in Merlot and Sangiovese. Cluster compactness was reduced with the severity of defoliation only in Merlot, due to a decrease in berry number per cluster; berry fresh weight was unaffected in both cultivars. On the contrary, in Cabernet Sauvignon, yield was unaffected but berry size was restrained by leaf removal. Skin and seed mass followed variations in berry mass (except for seed mass in Sangiovese). Fruit zone leaf removal did not affect must soluble solids and increased titratable acidity only in Merlot. Defoliation increased skin anthocyanins in Merlot and Cabernet Sauvignon in the order FR > LR > ND but significantly reduced seed flavan-3-ols mainly as a result of the reduction in catechin and epicatechin amount. For these varieties, FR had lower seed flavan-3-ols than ND in both varieties, whereas LR had intermediate values. However, in Sangiovese, the highest seed phenolic content was recorded in LR. The results showed that post-flowering leaf removal improved the overall berry composition in Merlot and Cabernet Sauvignon but had limited effect in Sangiovese. © 2012 American Chemical Society.	en
heal.journalName	Journal of Agricultural and Food Chemistry	en
dc.identifier.issue	23	en
dc.identifier.volume	60	en
dc.identifier.doi	10.1021/jf300605j	en
dc.identifier.spage	6000	en
dc.identifier.epage	6010	en