« Previous AbstractEffects of 3 Feeding Modes on the Volatile and Nonvolatile Compounds in the Edible Tissues of Female Chinese Mitten Crab (Eriocheir sinensis)    Next AbstractBiosynthesis and emission of insect herbivory-induced volatile indole in rice »

J Agric Food Chem

Title:		Emission of volatile chemicals from flowering dogwood (cornus Florida L.) flowers
Author(s):		Zhuang X; Klingeman WE; Hu J; Chen F;
Address:		"Department of Plant Sciences, 2431 Joe Johnson Drive, University of Tennessee, Knoxville, Tennessee 37996-4561, USA"
Journal Title:		J Agric Food Chem
Year:		2008
Volume:		20080924
Issue:		20
Page Number:		9570 - 9574
DOI:		10.1021/jf801651v
ISSN/ISBN:		1520-5118 (Electronic) 0021-8561 (Linking)
Abstract:		"Reproduction of flowering dogwood trees occurs via obligate out-crossing, and U.S. native bees have been suggested to be primary pollinators of this ecologically and economically important deciduous tree. Whether floral volatiles play a role in reproduction of the dogwood remains unclear. Objectives of this study were to identify principal volatile chemicals emitted from dogwood flowers and to assess a temporal volatile emission profile and volatile consistency across four cultivars. Inflorescences with intact bracts and 5 cm flower pedicel were removed from dogwood trees and subjected to headspace volatile collection. Six principal volatile compounds were detected from the flowers of the cultivar 'World's Fair' with 3-formylpyridine as the most abundant constituent. Subsequent headspace analyses performed using inflorescences without bracts or floral pedicels alone indicated that 3-formylpyridine, E-beta-ocimene, S-linalool, and ketoisophorone were mainly emitted from inflorescences. Experiments were also conducted to determine whether volatile emissions differed across time and between different cultivars of flowering dogwood. When volatile emission was analyzed for 48 h using 12 h light/dark cycles, the emission of several volatile compounds displayed diurnal patterns. Finally, whereas florets in inflorescences of four different dogwood cultivars emitted similar levels of the six principal floral volatile chemicals, 'Cherokee Brave' flowers alone yielded 4-methoxybenzaldehyde and germacrene-D. The implications of the findings of this study to dogwood breeding programs are discussed"
Keywords:		Acyclic Monoterpenes Cornus/*chemistry Flowers/*chemistry Gas Chromatography-Mass Spectrometry Monoterpenes/analysis Volatilization;
Notes:		"MedlineZhuang, Xiaofeng Klingeman, William E Hu, Jun Chen, Feng eng 2008/09/25 J Agric Food Chem. 2008 Oct 22; 56(20):9570-4. doi: 10.1021/jf801651v. Epub 2008 Sep 24"