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ARS Home Northeast Area Geneva, New York Grape Genetics Research Unit (GGRU) Research Publications at this Location





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Title:   Author  item
                                            LIANG, ZHENCHANG - Cornell Universityitem
                                            Yang, Yingzhenitem
                                            CHENG, LAILIANG - Cornell Universityitem
                                            Zhong, Gan-Yuan
  Submitted to: Journal of Agricultural and Food Chemistry
                                    Publication Type: Peer Reviewed Journal
                                    Publication Acceptance Date: 10/10/2011
                                    Publication  Date: 1/26/2012
                                    Citation: Liang, Z., Yang, Y., Cheng, L., Zhong, G. 2012. Characterization of polyphenolic metabolites in the seeds of Vitis germplasm. Journal of Agricultural and Food Chemistry. 60(5):1291-1299.Interpretive Summary: Grapes are rich in many compounds that have significant benefits to human nutrition and health. Polyphenols are one class of such compounds. In this study, we evaluated the composition and content of polyphenols in the seed of 91 grape accessions from 17 grape species in 2 consecutive years. A total of 28 polyphenolic compounds were detected and quantified.  Several of the polyphenolic compounds detected in this study, such as flavonols, are known to be important to human health. Among the 17 species investigated,  V. palmata, V. vinifera and V. vulpina were found to have significantly higher levels of total polyphenolic content than the other species. A number of accessions possessing high content of various individual groups of seed polyphenolic compounds were also identified. Many accessions used in this study are maintained in the USDA-Agricultural Research Service, Plant Genetic Resources Unit in Geneva, New York. This study will be an important addition to our ongoing effort in developing a comprehensive database of nutrition- and health-related secondary metabolites in the grape germplasm for grape improvement.
                                Technical Abstract: The composition and content of polyphenolic compounds in the seeds of 91 grape accessions from 17 Vitis species were characterized for two consecutive years. A total of 28 polyphenolic compounds including 2 gallic derivatives, 3 monomer flava-3-ols, 15 dimer flava-3-ols, 4 trimer flava-3-ols, resveratrol and 3 flavonols, were identified via HPLC-MS and quantified by HPLC-DAD. Tremendous variation in these six groups of compounds was observed both among and within the species studied. Monomer flava-3-ols were the most abundant, followed by dimerc and trimer flava-3-ols. They collectively accounted for more than 96% of the total variation. V. palmata, V. vinifera and V. vulpina were found to have significantly higher levels of total polyphenolic content than other species. A number of accessions possessing high content of various individual groups of seed polyphenolic compounds were also identified. This study will be an important addition to our ongoing effort in developing a comprehensive database of nutrition- and health-related secondary metabolites in the Vitis germplasm for grape improvement.


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