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TitleExploring metabolic responses of potato tissue induced by electric pulses
Author(s)Gómez Galindo, Federico
Wadsö, Lars
Vicente, A. A.
Dejmek, Petr
KeywordsMetabolic stimulation
Isothermal calorimetry
Electrical resistance
Issue dateDec-2008
JournalFood Biophysics
Citation“Food Biophysics”. ISSN 1557-1858. 3:4 (2008) 352–360.
Abstract(s)In this study, we investigated the metabolic responses of potato tissue induced by pulsed electric field (PEF). Potato tissue was subjected to field strengths ranging from 30 to 500 V/cm, with a single rectangular pulse of 10 μs, 100 μs, or 1 ms. Metabolic responses were monitored using isothermal calorimetry, changes on electrical resistance during the delivery of the pulse, as well as impedance measurements. Our results show that the metabolic response involves oxygen consuming pathways as well as other unidentified events that are shown to be insensitive to metabolic inhibitors such as KCN and sodium azide. The metabolic response is strongly dependent on pulsing conditions and is independent of the total permeabilization achieved by the pulse. Evidence shows that calorimetry is a simple and powerful method for exploring conditions for metabolic stimulation, providing information on metabolic responses that can not be obtained from electrical measurements. This study set the basis for further investigations on defense-related consequences of PEF-induced stress.
AccessOpen access
Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series

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