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Effect of shading on accumulation of flavonoid compounds in (Vitis vinifera L.) pinot noir fruit and extraction in a model system.
J Agric Food Chem. 2006 Nov 01; 54(22):8510-20.JA

Abstract

Accumulation and compositional changes of flavonols, proanthocyanidins, and anthocyanins were measured in Vitis vinifera L. cv. Pinot noir in shaded and exposed treatments. In addition, extraction of these compounds into a model wine solution was measured. The study was conducted in a commercial vineyard within a uniform zone of relatively low vigor vines. Light exclusion boxes were installed on pairs of clusters on the same shoot (shaded treatment), and a second set of clusters on an adjacent shoot were labeled as the exposed treatment. Fruit samples were harvested at the onset of ripening (véraison) and at commercial harvest. Cluster shading resulted in a substantial decrease in mg/berry accumulation of flavonols and skin proanthocyanidins and minimal differences in anthocyanins. In analyzing seed proanthocyanidins by phloroglucinolysis, shaded and exposed treatments were similar at véraison; however, by harvest, the shaded treatment had higher extension and terminal subunits (nmol/seed) as compared to the exposed treatment. For skin proanthocyanidins, shaded fruit was lower for all subunits (nmol/berry) at both véraison and harvest. Shading caused an increase in the proportion of (-)-epicatechin and a decrease in (-)-epigallocatechin at harvest in skin extension subunits. Seed proanthocyanidins in shaded fruit contained a lower proportion of (+)-catechin and a higher proportion of (-)-epicatechin-3-O-gallate in extension subunits and a lower proportion of (+)-catechin and (-)-epicatechin-3-O-gallate and a higher proportion of (-)-epicatechin in terminal subunits. For anthocyanins, the shaded treatment had a proportional reduction in delphinidin, cyanidin, petunidin, and malvidin and a large increase in peonidin glucosides. The model extractions from the two treatments paralleled differences in the fruit with a lower concentration of flavonols, anthocyanins, and proanthocyanidins in the shaded treatment. The skin proanthocyanidin percent extraction was found to be approximately 17% higher in the exposed model extraction than the shaded treatment.

Authors+Show Affiliations

Department of Food Science and Technology, Oregon State University, Corvallis, Oregon, 97331, USA.No affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17061828

Citation

Cortell, Jessica M., and James A. Kennedy. "Effect of Shading On Accumulation of Flavonoid Compounds in (Vitis Vinifera L.) Pinot Noir Fruit and Extraction in a Model System." Journal of Agricultural and Food Chemistry, vol. 54, no. 22, 2006, pp. 8510-20.
Cortell JM, Kennedy JA. Effect of shading on accumulation of flavonoid compounds in (Vitis vinifera L.) pinot noir fruit and extraction in a model system. J Agric Food Chem. 2006;54(22):8510-20.
Cortell, J. M., & Kennedy, J. A. (2006). Effect of shading on accumulation of flavonoid compounds in (Vitis vinifera L.) pinot noir fruit and extraction in a model system. Journal of Agricultural and Food Chemistry, 54(22), 8510-20.
Cortell JM, Kennedy JA. Effect of Shading On Accumulation of Flavonoid Compounds in (Vitis Vinifera L.) Pinot Noir Fruit and Extraction in a Model System. J Agric Food Chem. 2006 Nov 1;54(22):8510-20. PubMed PMID: 17061828.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of shading on accumulation of flavonoid compounds in (Vitis vinifera L.) pinot noir fruit and extraction in a model system. AU - Cortell,Jessica M, AU - Kennedy,James A, PY - 2006/10/26/pubmed PY - 2007/1/5/medline PY - 2006/10/26/entrez SP - 8510 EP - 20 JF - Journal of agricultural and food chemistry JO - J Agric Food Chem VL - 54 IS - 22 N2 - Accumulation and compositional changes of flavonols, proanthocyanidins, and anthocyanins were measured in Vitis vinifera L. cv. Pinot noir in shaded and exposed treatments. In addition, extraction of these compounds into a model wine solution was measured. The study was conducted in a commercial vineyard within a uniform zone of relatively low vigor vines. Light exclusion boxes were installed on pairs of clusters on the same shoot (shaded treatment), and a second set of clusters on an adjacent shoot were labeled as the exposed treatment. Fruit samples were harvested at the onset of ripening (véraison) and at commercial harvest. Cluster shading resulted in a substantial decrease in mg/berry accumulation of flavonols and skin proanthocyanidins and minimal differences in anthocyanins. In analyzing seed proanthocyanidins by phloroglucinolysis, shaded and exposed treatments were similar at véraison; however, by harvest, the shaded treatment had higher extension and terminal subunits (nmol/seed) as compared to the exposed treatment. For skin proanthocyanidins, shaded fruit was lower for all subunits (nmol/berry) at both véraison and harvest. Shading caused an increase in the proportion of (-)-epicatechin and a decrease in (-)-epigallocatechin at harvest in skin extension subunits. Seed proanthocyanidins in shaded fruit contained a lower proportion of (+)-catechin and a higher proportion of (-)-epicatechin-3-O-gallate in extension subunits and a lower proportion of (+)-catechin and (-)-epicatechin-3-O-gallate and a higher proportion of (-)-epicatechin in terminal subunits. For anthocyanins, the shaded treatment had a proportional reduction in delphinidin, cyanidin, petunidin, and malvidin and a large increase in peonidin glucosides. The model extractions from the two treatments paralleled differences in the fruit with a lower concentration of flavonols, anthocyanins, and proanthocyanidins in the shaded treatment. The skin proanthocyanidin percent extraction was found to be approximately 17% higher in the exposed model extraction than the shaded treatment. SN - 0021-8561 UR - https://www.unboundmedicine.com/medline/citation/17061828/Effect_of_shading_on_accumulation_of_flavonoid_compounds_in__Vitis_vinifera_L___pinot_noir_fruit_and_extraction_in_a_model_system_ DB - PRIME DP - Unbound Medicine ER -
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