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Physiol Plant

Title:		Cuticle characteristics and volatile emissions of petals in Antirrhinum majus
Author(s):		Goodwin SM; Kolosova N; Kish CM; Wood KV; Dudareva N; Jenks MA;
Address:		"Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN 47907, USA Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA"
Journal Title:		Physiol Plant
Year:		2003
Volume:		117
Issue:		3
Page Number:		435 - 443
DOI:		10.1034/j.1399-3054.2003.00047.x
ISSN/ISBN:		1399-3054 (Electronic) 0031-9317 (Linking)
Abstract:		"Floral volatiles, which are small and generally water-insoluble, must move from their intracellular sites of synthesis through the outermost cuticle membrane before release from the flower surface. To determine whether petal cuticle might influence volatile emissions, we performed the first analysis of petal cuticle development and its association with the emission of flower volatiles using Antirrhinum majus L. (snapdragon) as a model system. Petal cuticular wax amount and composition, cuticle thickness and ultrastructure, and the amounts of internal and emitted methylbenzoate (the major snapdragon floral scent compound) were examined during 12 days, from flower opening to senescence. Normal (n-) alkanes were found to be the major wax class of snapdragon petals (29.0% to 34.3%) throughout the 12 days examined. Besides n-alkanes, snapdragon petals possessed significant amounts of methyl branched alkanes (23.6-27.8%) and hydroxy esters (12.0-14.0%). Hydroxy esters have not been previously reported in plants. Changes in amount of methylbenzoate inside the petals followed closely with levels of methylbenzoate emission, suggesting that snapdragon petal cuticle may provide little diffusive resistance to volatile emissions. Moreover, clear associations did not exist between methylbenzoate emission and the cuticle properties examined during development. Nevertheless, the unique wax composition of snapdragon petal cuticles shows similarities with those of other highly permeable cuticles, suggesting an adaptation that could permit rapid volatile emission by scented flowers"
Keywords:
Notes:		"PubMed-not-MEDLINEGoodwin, S Mark Kolosova, Natalia Kish, Christine M Wood, Karl V Dudareva, Natalia Jenks, Matthew A eng Denmark 2003/03/26 Physiol Plant. 2003 Mar; 117(3):435-443. doi: 10.1034/j.1399-3054.2003.00047.x"