title: Influence of cluster zone leaf removal on Pinot noir grape chemical and volatile composition.
abstract: The influence of cluster-zone leaf removal on Pinot noir vine growth and fruit chemical and volatile composition was investigated in 3 years. Different severities of leaf removal (0%, 50%, 100%) were imposed during the pea-size stage of development from the cluster zone. Results show that cluster-zone leaf removal had little influence on vine growth, crop load, or grape maturity in terms of total soluble solids (TSS), pH or titratable acidity (TA) at harvest. However, 100% leaf removal resulted in higher concentrations of quercetin glycoside in grapes compared to 0% leaf removal. The 100% leaf removal also increased concentrations of petunidin- and malvidin-3-monoglucoside anthocyanins in two out of 3 years (2010 and 2012) by an average of 62% and 53%, respectively. In addition, 100% leaf removal resulted in higher concentrations of β-damascenone, and some bound-form terpenoids. The increases in β-damascenone were positively correlated to the increased sunlight exposure.
authors.affiliation: Department of Food Science and Technology, Oregon State University, Corvallis, OR 97731, USA.
authors.forename: Hui
authors.initials: H
authors.lastname: Feng
authors.affiliation: Department of Food Science and Technology, Oregon State University, Corvallis, OR 97731, USA.
authors.forename: Fang
authors.initials: F
authors.lastname: Yuan
authors.affiliation: Department of Horticulture, Oregon State University, Corvallis, OR 97331, USA.
authors.forename: Patricia A
authors.initials: PA
authors.lastname: Skinkis
authors.affiliation: Department of Food Science and Technology, Oregon State University, Corvallis, OR 97731, USA. Electronic address: michael.qian@oregonstate.edu.
authors.forename: Michael C
authors.initials: MC
authors.lastname: Qian
mesh_terms: D000383:Agriculture / Q000379:methods*; D000872:Anthocyanins / Q000032:analysis; D005638:Fruit / Q000737:chemistry* / Q000254:growth & development; D005960:Glucosides / Q000032:analysis; D045792:Norisoprenoids / Q000032:analysis; D018515:Plant Leaves / Q000502:physiology*; D011794:Quercetin / Q000032:analysis; D013472:Sunlight; D027843:Vitis / Q000254:growth & development*; D055549:Volatile Organic Compounds / Q000032:analysis*; D014887:Weather
chemical_list: D000872:Anthocyanins; D005960:Glucosides; D045792:Norisoprenoids; D055549:Volatile Organic Compounds; C065861:malvidin; C455107:petunidin-3-glucoside; C458419:malvidin-3-glucoside; D011794:Quercetin; C075388:beta-damascenone; C473206:petunidin
keywords: Cluster-zone leaf removal; Phenolics; Pinot noir grape; SBSE–GC–MS; Sunlight exposure; Volatile compounds; β-Damascenone