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In situ visualization of the effect of a pulsed electric field on plant tissue

Fincan, Mustafa LU and Dejmek, Petr LU (2002) In Journal of Food Engineering 55(3). p.223-230
Abstract
A new method was developed for in situ visualization of changes related to electropermeabilization of plant tissue. Onion epidermis stained with neutral red was subjected to a pulsed electric field (PEF), and serial images were captured by a camera connected to a stercomicroscope. Sample resistance was recorded simultaneously. Above a threshold level of a field strength of 0.35 kV/cm, it was possible to distinguish the individual permeabilized cells by their colour. Over 90-95% of the PEF-induced colour changes occurred during the first 2-3 min after the electric pulse and the rest after some 20 min. The size and rate of the observed changes were correlated with the severity of PEF, and were further influenced by the pH and conductivity of... (More)
A new method was developed for in situ visualization of changes related to electropermeabilization of plant tissue. Onion epidermis stained with neutral red was subjected to a pulsed electric field (PEF), and serial images were captured by a camera connected to a stercomicroscope. Sample resistance was recorded simultaneously. Above a threshold level of a field strength of 0.35 kV/cm, it was possible to distinguish the individual permeabilized cells by their colour. Over 90-95% of the PEF-induced colour changes occurred during the first 2-3 min after the electric pulse and the rest after some 20 min. The size and rate of the observed changes were correlated with the severity of PEF, and were further influenced by the pH and conductivity of the solution used in mounting the epidermis, the sampling location on the onion epidermis, and cell size and number. The final conductivity increase was directly proportional to the number of permeabilized cells. Permeabilization was not randomly distributed but occurred along preferential paths connecting the electrodes. (C) 2002 Elsevier Science Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
onion, pulsed electric field, visualization, cell permeablization, epidermis, neutral red
in
Journal of Food Engineering
volume
55
issue
3
pages
223 - 230
publisher
Elsevier
external identifiers
  • wos:000178945200005
  • scopus:0036887437
ISSN
0260-8774
DOI
10.1016/S0260-8774(02)00079-1
language
English
LU publication?
yes
id
e8362a6e-0ee9-4f00-be53-4af7273451f7 (old id 324452)
date added to LUP
2007-08-17 12:50:06
date last changed
2017-10-29 04:20:02
@article{e8362a6e-0ee9-4f00-be53-4af7273451f7,
  abstract     = {A new method was developed for in situ visualization of changes related to electropermeabilization of plant tissue. Onion epidermis stained with neutral red was subjected to a pulsed electric field (PEF), and serial images were captured by a camera connected to a stercomicroscope. Sample resistance was recorded simultaneously. Above a threshold level of a field strength of 0.35 kV/cm, it was possible to distinguish the individual permeabilized cells by their colour. Over 90-95% of the PEF-induced colour changes occurred during the first 2-3 min after the electric pulse and the rest after some 20 min. The size and rate of the observed changes were correlated with the severity of PEF, and were further influenced by the pH and conductivity of the solution used in mounting the epidermis, the sampling location on the onion epidermis, and cell size and number. The final conductivity increase was directly proportional to the number of permeabilized cells. Permeabilization was not randomly distributed but occurred along preferential paths connecting the electrodes. (C) 2002 Elsevier Science Ltd. All rights reserved.},
  author       = {Fincan, Mustafa and Dejmek, Petr},
  issn         = {0260-8774},
  keyword      = {onion,pulsed electric field,visualization,cell permeablization,epidermis,neutral red},
  language     = {eng},
  number       = {3},
  pages        = {223--230},
  publisher    = {Elsevier},
  series       = {Journal of Food Engineering},
  title        = {In situ visualization of the effect of a pulsed electric field on plant tissue},
  url          = {http://dx.doi.org/10.1016/S0260-8774(02)00079-1},
  volume       = {55},
  year         = {2002},
}