Influence of Virus Inflections on Impedance Parameters

Greenham, C. G.; Helms, Katie; Müller, W. J.

doi:10.1093/jxb/29.4.867

Cited by 17 publications

(8 citation statements)

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“…Modifications of this basic concept were applied to biological, biochemical, or biomedical problems (4)(5)(6)(7)(8)(9)(10). In the field of plant physiology, electrical impedance analysis was used to detect freezing injury (11,12), cold adaptation (13,14), or infection by viruses (15).…”

Section: Introductionmentioning

confidence: 99%

Electrophysiological Model of Intact and Processed Plant Tissues: Cell Disintegration Criteria

Angersbach¹,

Heinz²,

Knorr³

1999

Biotechnol. Prog.

189

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Frequency versus conductivity relationships of food cell system, based on impedance measurements as characterized by polarization effects of the Maxwell-Wagner type at intact membrane interfaces, are presented. The electrical properties of a biological membrane (represented as a resistor and capacitor) are responsible for the dependence of the total conductivity of the cell system on the alternating current frequency. Based on an equivalent circuit model of a single plant cell, the electrical conductivity spectrum of the cell system in intact plant tissue (potato, carrot, banana, and apple) was determined in a frequency range between 3 kHz and 50 MHz. The electrical properties of a cell system with different ratios of intact/ruptured cells could also be predicted on the basis of a description of a cell system consisting of elementary layers with regularly distributed intact and ruptured cells as well as of extracellular compartments. This simple determination of the degree of cell permeabilization (cell disintegration index, p(o)) is based upon electric conductivity changes in the cell sample. For accurate calculations of p(o), the sample conductivities before and after treatment, obtained at low- (f(l)) and high-frequency (f(h)) ranges of the so-called beta-dispersion, were used. In this study with plant cell systems, characteristic conductivities used were measured at frequencies f(l) = 3 kHz and f(h) = 12.5 MHz. The disintegration index was used to analyze the degree of cell disruption after different treatments (such as mechanical disruption, heating, freeze-thaw cycles, application of electric field pulses, and enzymatic treatment) of the plant tissues.

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Section: Introductionmentioning

confidence: 99%

Electrophysiological Model of Intact and Processed Plant Tissues: Cell Disintegration Criteria

Angersbach¹,

Heinz²,

Knorr³

1999

Biotechnol. Prog.

189

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“…The roots were immersed in the nutrient KNOP solution at various concentrations (0.1x); (1x); (2x) and (4x). For the control concentration (1x) the constitution was the following (g/l): KNO 3 …”

Section: Hydroponic Culturementioning

confidence: 99%

“…Measurements of electrical impedance have been used to estimate the general sanitary state of plants [1], the nu-tritional state [2], the presence of viruses [3], the damage to fruit [4], frost intensity [5], structural variation of cells according to ethylene induction by electric currents [6], cell viability during increasing frost [7], rooting capacity of cuttings [8], fruit maturity [9] [10], sensitivity to salinity [11], etc.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Short-Term Stress Applied to the Root System by Electrical Impedance Measurement in the First Leaf of Corn (<i>Zea mays</i> L.) and Pumpkin (<i>Cucurbita maxima</i> L.)

Laarabi¹

2014

AJPS

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We applied electrical spectroscopic impedance measurements (ESI) to the first leaf of intact plants of corn and pumpkin. The electric capacity (C) and resistance (Rp) were determined at the characteristic frequency (FC). We observed that the electrical parameters of the ESI change in relation to the nutrition and the addition to the root medium of KCN, N,N'-dicyclohexylcar-bodiimide (DCCD), CH 3 COOH, H 2 SO 4 , polyethylene glycol 200 (PEG 200) and NaCl. The amplitude of the curves of bioimpedance spectrometry decreased when plant roots were stressed comparatively to their controls. An increase of the electrical capacity with a reduction of the electrical resistance characterizes a stress. The increase of stress intensity provokes decreases of Rp and curve amplitudes and an increase of C. We conclude that electrical parameters studied can be widely used for stress characterization.

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“…Two modeling approaches were proposed and the model parameters were correlated with the physical characteristics of the leaves. Electrical impedance measurements were also used by other authors to assess several plant characteristics (Greenham et al, 1978;Zhang and Willison, 1993;Mizukami et al, 2007;Hong et al, 2009;Urban et al, 2011;Ellis et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Modeling vegetable fractals by means of fractional-order equations

Lopes

Machado

2015

Journal of Vibration and Control

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This paper characterizes four 'fractal vegetables': (i) cauliflower (brassica oleracea var. Botrytis); (ii) broccoli (brassica oleracea var. italica); (iii) round cabbage (brassica oleracea var. capitata) and (iv) Brussels sprout (brassica oleracea var. gemmifera), by means of electrical impedance spectroscopy and fractional calculus tools. Experimental data is approximated using fractional-order models and the corresponding parameters are determined with a genetic algorithm. The Havriliak-Negami five-parameter model fits well into the data, demonstrating that classical formulae can constitute simple and reliable models to characterize biological structures.

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Influence of Virus Inflections on Impedance Parameters

Cited by 17 publications

References 0 publications

Electrophysiological Model of Intact and Processed Plant Tissues: Cell Disintegration Criteria

Electrophysiological Model of Intact and Processed Plant Tissues: Cell Disintegration Criteria

Characterization of Short-Term Stress Applied to the Root System by Electrical Impedance Measurement in the First Leaf of Corn (<i>Zea mays</i> L.) and Pumpkin (<i>Cucurbita maxima</i> L.)

Modeling vegetable fractals by means of fractional-order equations

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Influence of Virus Inflections on Impedance Parameters

Cited by 17 publications

References 0 publications

Electrophysiological Model of Intact and Processed Plant Tissues: Cell Disintegration Criteria

Electrophysiological Model of Intact and Processed Plant Tissues: Cell Disintegration Criteria

Characterization of Short-Term Stress Applied to the Root System by Electrical Impedance Measurement in the First Leaf of Corn (&lt;i&gt;Zea mays&lt;/i&gt; L.) and Pumpkin (&lt;i&gt;Cucurbita maxima&lt;/i&gt; L.)

Modeling vegetable fractals by means of fractional-order equations

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Characterization of Short-Term Stress Applied to the Root System by Electrical Impedance Measurement in the First Leaf of Corn (<i>Zea mays</i> L.) and Pumpkin (<i>Cucurbita maxima</i> L.)