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J Agric Food Chem

Title:		Volatile profiles of members of the USDA Geneva Malus Core Collection: utility in evaluation of a hypothesized biosynthetic pathway for esters derived from 2-methylbutanoate and 2-methylbutan-1-ol
Author(s):		Sugimoto N; Forsline P; Beaudry R;
Address:		"Department of Horticulture, Michigan State University , East Lansing, Michigan 48824, United States"
Journal Title:		J Agric Food Chem
Year:		2015
Volume:		20150216
Issue:		7
Page Number:		2106 - 2116
DOI:		10.1021/jf505523m
ISSN/ISBN:		1520-5118 (Electronic) 0021-8561 (Linking)
Abstract:		"The volatile ester and alcohol profiles of ripening apple fruit from 184 germplasm lines in the USDA Malus Germplasm Repository at the New York Agricultural Experiment Station in Geneva, NY, USA, were evaluated. Cluster analysis suggested biochemical relationships exist between several ester classes. A strong linkage was revealed between 2-methylbutanoate, propanoate, and butanoate esters, suggesting the influence of the recently proposed 'citramalic acid pathway' in apple fruit. Those lines with a high content of esters formed from 2-methylbutan-1-ol and 2-methylbutanoate (2MB) relative to straight-chain (SC) esters (high 2MB/SC ratio) exhibited a marked increase in isoleucine and citramalic acid during ripening, but those lines with a low content did not. Thus, the data were consistent with the existence of the hypothesized citramalic acid pathway and suggest that the Geneva Malus Germplasm Repository, appropriately used, could be helpful in expanding our understanding of mechanisms for fruit volatile synthesis and other aspects of secondary metabolism"
Keywords:		Biosynthetic Pathways Esters/*chemistry/metabolism Fruit/chemistry/classification/growth & development/metabolism Malus/*chemistry/classification/growth & development/metabolism United States United States Department of Agriculture Volatile Organic Compou;
Notes:		"MedlineSugimoto, Nobuko Forsline, Philip Beaudry, Randolph eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. 2015/02/05 J Agric Food Chem. 2015 Feb 25; 63(7):2106-16. doi: 10.1021/jf505523m. Epub 2015 Feb 16"