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Food Chem

Title:		Regulated deficit irrigation strategies affect the terpene accumulation in Gewurztraminer (Vitis vinifera L.) grapes grown in the Okanagan Valley
Author(s):		Kovalenko Y; Tindjau R; Madilao LL; Castellarin SD;
Address:		"Wine Research Centre, The University of British Columbia, 2205 East Mall, Vancouver, BC V6T 1Z4, Canada. Wine Research Centre, The University of British Columbia, 2205 East Mall, Vancouver, BC V6T 1Z4, Canada. Electronic address: simone.castellarin@ubc.ca"
Journal Title:		Food Chem
Year:		2021
Volume:		20200924
Issue:		Pt 2
Page Number:		128172 -
DOI:		10.1016/j.foodchem.2020.128172
ISSN/ISBN:		1873-7072 (Electronic) 0308-8146 (Linking)
Abstract:		"Regulated deficit irrigation (RDI) is a viticultural practice known to improve grape phenolics and color in red grapes; however, the impact of this practice on grape aromas remains largely unknown. The effects of RDI treatments applied at various berry developmental stages on canopy, yield, and free and glycoside-bound terpenes of the berry were investigated for three consecutive seasons. All RDI treatments reduced leaf photosynthesis and yield, but not when applied after veraison. Berry total soluble solids at harvest were reduced by RDI applied after veraison or throughout the season. Despite reducing berry sugars, RDI applied after veraison increased the concentration at harvest of key free terpenes for Gewurztraminer grapes such as geraniol and citronellol. RDI treatments down-regulated some terpene genes, which indicates that the observed changes in terpene concentration were not transcriptionally regulated. This study suggests that RDI applied after version can potentially improve wine aroma in Gewurztraminer"
Keywords:		"Agricultural Irrigation/*methods British Columbia Fruit/genetics/growth & development/*metabolism Gene Expression Regulation, Plant Odorants/analysis Phenols Photosynthesis Plant Leaves/physiology Seasons Terpenes/*metabolism Vitis/genetics/*growth & deve;"
Notes:		"MedlineKovalenko, Yevgen Tindjau, Ricco Madilao, Lufiani Lina Castellarin, Simone Diego eng England 2020/10/12 Food Chem. 2021 Mar 30; 341(Pt 2):128172. doi: 10.1016/j.foodchem.2020.128172. Epub 2020 Sep 24"