« Previous AbstractThe transcription factor HIG1/MYB51 regulates indolic glucosinolate biosynthesis in Arabidopsis thaliana    Next AbstractSocial interactions among grazing reef fish drive material flux in a coral reef ecosystem »

Phytochemistry

Title:		Volatile organic compounds characterized from grapevine (Vitis vinifera L. cv. Malbec) berries increase at pre-harvest and in response to UV-B radiation
Author(s):		Gil M; Bottini R; Berli F; Pontin M; Silva MF; Piccoli P;
Address:		"Laboratorio de Bioquimica Vegetal, Instituto de Biologia Agricola de Mendoza, Consejo Nacional de Investigaciones Cientificas y Tecnologicas-Universidad Nacional de Cuyo, Almirante Brown 500, M5528AHB Chacras de Coria, Argentina"
Journal Title:		Phytochemistry
Year:		2013
Volume:		20130925
Issue:
Page Number:		148 - 157
DOI:		10.1016/j.phytochem.2013.08.011
ISSN/ISBN:		1873-3700 (Electronic) 0031-9422 (Linking)
Abstract:		"Ultraviolet-B solar radiation (UV-B) is an environmental signal with biological effects in plant tissues. Recent investigations have assigned a protective role of volatile organic compounds (VOCs) in plant tissues submitted to biotic and abiotic stresses. This study investigated VOCs in berries at three developmental stages (veraison, pre-harvest and harvest) of Vitis vinifera L. cv. Malbec exposed (or not) to UV-B both, in in vitro and field experiments. By Head Space-Solid Phase Micro Extraction-Gas Chromatography-Electron Impact Mass Spectrometry (HS-SPME-GC-EIMS) analysis, 10 VOCs were identified at all developmental stages: four monoterpenes, three aldehydes, two alcohols and one ketone. Monoterpenes increased at pre-harvest and in response to UV-B in both, in vitro and field conditions. UV-B also augmented levels of some aldehydes, alcohols and ketones. These results along with others from the literature suggest that UV-B induce grape berries to produce VOCs (mainly monoterpenes) that protect the tissues from UV-B itself and other abiotic and biotic stresses, and could affect the wine flavor. Higher emission of monoterpenes was observed in the field experiments as compared in vitro, suggesting the UV-B/PAR ratio is not a signal in itself"
Keywords:		Alcohols/analysis/radiation effects Aldehydes/analysis/radiation effects Fruit/chemistry Gas Chromatography-Mass Spectrometry Ketones/analysis/radiation effects Molecular Structure Monoterpenes/*analysis/radiation effects *Ultraviolet Rays Vitis/*chemistr;
Notes:		"MedlineGil, Mariana Bottini, Ruben Berli, Federico Pontin, Mariela Silva, Maria Fernanda Piccoli, Patricia eng Research Support, Non-U.S. Gov't England 2013/10/01 Phytochemistry. 2013 Dec; 96:148-57. doi: 10.1016/j.phytochem.2013.08.011. Epub 2013 Sep 25"