Volatile organic compounds characterized from grapevine (Vitis vinifera L. cv. Malbec) berries increase at pre-harvest and in response to UV-B radiation

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.

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Bibliographic Details
Main Authors: Gil, Mariana, Bottini, Ambrosio Rubén, Berli, Federico Javier, Pontin, Mariela Ana, Silva, Maria Fernanda, Piccoli, Patricia Noemí
Format: info:ar-repo/semantics/artículo biblioteca
Language:eng
Published: 2013-12
Subjects:Uva, Compuesto Volátil, Radiación Ultravioleta, Radiación Solar, Terpenoidos, Grapevines, Volatile Compounds, Ultraviolet Radiation, Solar Radiation, Terpenoids, Malbec, Terpenos,
Online Access:https://www.sciencedirect.com/science/article/pii/S0031942213003336?via%3Dihub
http://hdl.handle.net/20.500.12123/2676
https://doi.org/10.1016/j.phytochem.2013.08.011
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