Electrical impedance analysis in plant tissues: a double shell model

Electrical impedance was measured at a range of AC frequencies of 100 Hz to 1 Mhz in potato tubers and carrot roots. Details of a method for analysing the data in relation to electrical models, using complex non-linear least squares (CNLS), are described. The measured data were analysed in relation...

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Bibliographic Details
Published in:Journal of experimental botany 1991-11, Vol.42 (244), p.1465-1475
Main Authors: Zhang, M.I.N, Willison, J.H.M
Format: Article
Language:English
Subjects:
Biological and medical sciences
Capacitance
Cell membranes
Cell physiology
complex non-linear least squares
cytoplasm
Daucus carota
electric circuits
Electric fields
Electrical impedance
electrical models
Electrodes
Fundamental and applied biological sciences. Psychology
impedance
mathematical models
membrane capacitance
Modeling
Parametric models
Plant physiology and development
Plant tissues
plasma membrane
Plasma membrane and permeation
Reactance
roots
Solanum tuberosum
statistical analysis
tissue impedance
Tubers
vacuoles
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Summary:Electrical impedance was measured at a range of AC frequencies of 100 Hz to 1 Mhz in potato tubers and carrot roots. Details of a method for analysing the data in relation to electrical models, using complex non-linear least squares (CNLS), are described. The measured data were analysed in relation to four previously-described electrical models for plant tissues. The results showed that plant tissue conforms well to a double-shell model which includes components (resistors and capacitors) representing the vacuole, as well as cytoplasm, plasma membrane, and extracellular space. The method permitted the calculation of specific membrane capacitance, which was found to approximate 1.0 microfarad cm-2.
ISSN:0022-0957
1460-2431
DOI:10.1093/jxb/42.11.1465