Document Detail


Study of the evolution of nitrogen compounds during grape ripening. application to differentiate grape varieties and cultivated systems.
MedLine Citation:
PMID:  19228058     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The aim of this work was to study the evolution of amino acids and ammonium during grape ripening and to evaluate its application to differentiate grape varieties and cultivated systems (organic and nonorganic). For this purpose, Monastrell, Syrah, Merlot, and Petit Verdot grapes produced using conventional agriculture and Monastrell grape cultivated using organic agriculture, collected during two consecutive harvests at different stages of ripening, were studied. These years of harvest were very different climatic years; even so, the grape varieties presented similar qualitative compositions. Therefore, the percentage of amino acids at harvest moment allowed differentiation of grapes according to variety and cultivated system, regardless of the year. The nitrogen composition could allow estimation of the fermentative aroma potential of grapes. Thus, Syrah was the grape with the greatest aroma potential at harvest. Monastrell nonorganic grape had a concentration of nitrogen compounds superior to that of Monastrell organic grape. In Monastrell, Syrah, and Merlot, traditional varieties in the area, the highest concentration of nitrogen compounds coincided with the highest degrees Baume/total acidity ratio and color index during 2007. Consequently, technological and phenolic maturity of these grape varieties coincided with the maximum composition of nitrogen compounds. However, in 2008, this did not happen because grape ripening was irregular as a consequence of different climatological conditions.
Authors:
Teresa Garde-Cerdán; Cándida Lorenzo; José Félix Lara; Francisco Pardo; Carmen Ancín-Azpilicueta; M Rosario Salinas
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  57     ISSN:  1520-5118     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2009 Mar 
Date Detail:
Created Date:  2009-03-18     Completed Date:  2009-05-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2410-9     Citation Subset:  IM    
Affiliation:
Catedra de Quimica Agricola, ETSI Agronomos, Universidad de Castilla-La Mancha, Campus Universitario, Albacete, Spain.
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MeSH Terms
Descriptor/Qualifier:
Agriculture / methods
Amino Acids / analysis
Climate
Fruit / chemistry*,  growth & development*
Health Food
Nitrogen Compounds / analysis*
Quaternary Ammonium Compounds / analysis
Seasons
Species Specificity
Vitis / growth & development*
Wine / analysis
Chemical
Reg. No./Substance:
0/Amino Acids; 0/Nitrogen Compounds; 0/Quaternary Ammonium Compounds

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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