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Planta

Title:		Rhythmic emission of floral volatiles from Rosa damascena semperflorens cv. 'Quatre Saisons'
Author(s):		Picone JM; Clery RA; Watanabe N; MacTavish HS; Turnbull CG;
Address:		"Department of Agricultural Sciences, Imperial College London, Wye Campus, TN25 5AH, Kent, UK"
Journal Title:		Planta
Year:		2004
Volume:		20040331
Issue:		3
Page Number:		468 - 478
DOI:		10.1007/s00425-004-1250-5
ISSN/ISBN:		0032-0935 (Print) 0032-0935 (Linking)
Abstract:		"The control of rhythmic emission of floral volatiles emitted from Rosa damascena semperflorens cv. 'Quatre Saisons' throughout floral development under various light regimes was studied. 2-Phenylethanol was the major volatile emitted in addition to monoterpenols, oxidised monoterpenols, monoterpenes and aromatic compounds. All detected volatiles were emitted rhythmically, with maximum peaks coinciding 8-10 h into a 12-h photoperiod. For some compounds a secondary, nocturnal peak was apparent. The primary and secondary maxima both occurred at approximately 24-h intervals. Rhythms appeared to be regulated endogenously: rhythmic emission continued upon exposure to continuous light or continuous darkness, and a phase shift in emission was induced upon inversion of the photoperiod. Additionally, emission continued after flower excision. A similar profile of free volatiles was stored within the floral tissue, together with glycosidic forms of 2-phenylethanol (>99% beta-D-glucoside), benzyl alcohol, citronellol and geraniol. Regression analysis indicated a significant decrease in glycosylated 2-phenylethanol through the photoperiod. These results suggest that glycosylated volatiles stored within petals may be a source of rhythmically emitted volatiles"
Keywords:		"Alcohols/metabolism Flowers/metabolism Glycosylation Oils, Volatile/metabolism Periodicity Phenylethyl Alcohol/metabolism Photoperiod Rosa/*metabolism;"
Notes:		"MedlinePicone, Joanne M Clery, Robin A Watanabe, Naoharu MacTavish, Hazel S Turnbull, Colin G N eng Germany 2004/04/01 Planta. 2004 Jul; 219(3):468-78. doi: 10.1007/s00425-004-1250-5. Epub 2004 Mar 31"