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Exploring metabolic responses of potato tissue induced by electric pulses

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Author

Summary, in English

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.

Department/s

Publishing year

2008

Language

English

Publication/Series

Food Biophysics

Document type

Journal article

Publisher

Springer

Topic

  • Food Engineering
  • Materials Engineering

Keywords

  • Metabolic stimulation
  • Isothermal calorimetry
  • Impedance
  • Electrical resistance

Status

Published

ISBN/ISSN/Other

  • ISSN: 1557-1866