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J Exp Bot

Title:		Characterization of volatile production during storage of lettuce (Lactuca sativa) seed
Author(s):		Mira S; Gonzalez-Benito ME; Hill LM; Walters C;
Address:		"Departamento de Biologia Vegetal, E.U.I.T. Agricola, Universidad Politecnica de Madrid, Madrid, Spain"
Journal Title:		J Exp Bot
Year:		2010
Volume:		20100905
Issue:		14
Page Number:		3915 - 3924
DOI:		10.1093/jxb/erq202
ISSN/ISBN:		1460-2431 (Electronic) 0022-0957 (Linking)
Abstract:		"The duration that seeds stay vigorous during storage is difficult to predict but critical to seed industry and conservation communities. Production of volatile compounds from lettuce seeds during storage was investigated as a non-invasive and early detection method of seed ageing rates. Over 30 volatile compounds were detected from lettuce seeds during storage at 35 degrees C at water contents ranging from 0.03 to 0.09 g H(2)O g(-1) dw. Both qualitative and quantitative differences in volatile composition were noted as a function of water content, and these differences were apparent before signs of deterioration were visible. Seeds stored at high water content (L >or=0.06 g H(2)O g(-1) dw) emitted molecular species indicative of glycolysis (methanol+ethanol), and evidence of peroxidation was apparent subsequent to viability loss. Seeds containing less water (0.03-0.05 g H(2)O g(-1) dw) produced volatiles indicative of peroxidation and survived longer compared with seeds stored under more humid conditions. Production of glycolysis-related by-products correlated strongly with deterioration rate when measured as a function of water content. This correlation may provide a valuable non-invasive means to predict the duration of the early, asymptomatic stage of seed deterioration"
Keywords:		Lettuce/chemistry/*embryology/metabolism Lipid Peroxidation Seeds/chemistry/growth & development/*metabolism Temperature Volatile Organic Compounds/analysis/*metabolism Water;
Notes:		"MedlineMira, Sara Gonzalez-Benito, M Elena Hill, Lisa M Walters, Christina eng Research Support, Non-U.S. Gov't England 2010/09/08 J Exp Bot. 2010 Sep; 61(14):3915-24. doi: 10.1093/jxb/erq202. Epub 2010 Sep 5"