Electrical Impedance Studies on Potato and Alfalfa Tissue

Hayden, Róisín; Moyse, C. A.; Calder, F. W.; Crawford, D.; Fensom, D. S.

doi:10.1093/jxb/20.2.177

Cited by 167 publications

(110 citation statements)

References 15 publications

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“…But the time constant increased with increasing temperature at nonfreezing temperatures (Table II). This is consistent with an expected membrane permeability increase with increasing temperature (10). Because NA stems were injured by freezing to -5.6°C and -8°C, it was not considered valid to calculate a time constant for NA stems at these temperatures.…”

Section: Discussionsupporting

confidence: 66%

“…In contrast to the (Hz) linear relationship between log (conductance) and T' reported by Hayden et al (10), other researchers (1, 3, 23) reported a linear relationship between log (resistance) and T. Walton (23) studied the effect of cold acclimation on the temperature dependence of tissue impedance and reported that the temperature dependence was similar for ACCL and NA tissue at freezing temperatures but was different at nonfreezing temperatures.…”

mentioning

confidence: 92%

“…Greenham and Daday (8) used 1000 Hz as a low frequency and 1.0 MHz as a high frequency. Hayden et al (10) recommended using 60 Hz for the low frequency impedance measurement.…”

mentioning

confidence: 99%

“…For example, Hayden et al (10) measured the electrical conductance (1/resistance) of alfalfa over the temperature range 5 to -6°C. E* was then calculated from Arrhenius plots of log (conductance) versus T-'.…”

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confidence: 99%

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Effect of Cold Acclimation on Bulk Tissue Electrical Impedance

Stout

1988

Plant Physiol.

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The resistive and reactive components of electrical impedance were measured for birdsfoot trefoil (Lotus corniculatus L.) stems at freezing temperatures to -8°C. As temperature decreased the specific resistance at frequencies between 49 hertz and 1.11 megahertz of stems from cold acclimated plants increased more rapidly than from nonaccimated plants. This temperature dependence of specific resistance could be characterized by an Arrhenius activation energy, cold acclimated stems had a larger Arrhenius activation energy than nonaccimated stems. The low frequency resistance is believed to characterize the extracellular region of the stems and the high frequency resistance is believed to characterize the intracellular region of the stems. Cold acclimation increased the intracellular but not the extracellular resistance at nonfreezing temperatures. Cold acclimated stems were not injured by freezing to -8°C and thawing, but nonaccimated stems were injured by freezing to temperatures between -2.2 and -5.6°C and thawing. hjury to nonaccimated stems at freezing temperatures below -2.2°C was indicated by a decrease in the ratio of resistance at 49 Hz to that at 1.11 megahertz.Large voltages develop at the ice water interface when dilute aqueous solutions are frozen (27). Freeze-induced electrical transients also occur when solutions containing protoplasts are frozen, but it is not known if these electrical transients can develop across the cell membranes and injure them (19,20 ability increased and membrane injury occurred while plants were in a frozen state.As temperature decreases, electrical impedance gradually increases at nonfreezing temperatures, and then increases rapidly at freezing temperatures (1,3,23). For example, Hayden et al. (10) measured the electrical conductance (1/resistance) of alfalfa over the temperature range 5 to -

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Section: Discussionsupporting

confidence: 66%

mentioning

confidence: 92%

“…Greenham and Daday (8) used 1000 Hz as a low frequency and 1.0 MHz as a high frequency. Hayden et al (10) recommended using 60 Hz for the low frequency impedance measurement.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

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Effect of Cold Acclimation on Bulk Tissue Electrical Impedance

Stout

1988

Plant Physiol.

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“…We attribute the changes primarily to the eŠects on the cell plasma membrane, both for theoretical reasons and based on the fact that the directly observed eŠect of gelatinization was too small to explain the large change in impedance (see below). Hayden et al 10) have divided the impedance of plant cell tissue into three components corresponding to the cell wall (R1), plasma membrane (R2), and cytoplasm (R3). As R2À ÀR1 and R3, damage to the plasma membrane by heating brought about the large decrease in impedance.…”

Section: Resultsmentioning

confidence: 99%

Relationship between the Electrical and Rheological Properties of Potato Tuber Tissue after Various Forms of Processing

Dejmek

Miyawaki

2002

Bioscience, Biotechnology, and Biochemistry

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Cellular Changes in “Hass” Avocado Mesocarp During Cold‐Pressed Oil Extraction

Yang

Hallett

Rebstock

et al. 2018

J Americ Oil Chem Soc

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The aim of this study was to understand factors affecting oil release from "Hass" avocado cells during the cold-pressed oil extraction process. Early-season "Hass" avocado fruit and pulp were sampled from a commercial extraction process. Light microscopy and electrical impedance spectroscopy were used to examine avocado flesh structure at defined steps during the extraction process (destoning, grinding, malaxing, and decanting). Most parenchyma cells were ruptured during destoning, grinding, and mixing before malaxing. In contrast, the other oil bearing cells, idioblast cells, appeared to remain unruptured and intact during the extraction process. The greatest reduction in electrical resistance was observed after the destoning step. There were also significant differences between the resistances of flesh after destoning, grinding, and prior to malaxing samples. Malaxing for two hours assisted the process of oil aggregation, which led to a greater oil yield. These findings will help to develop methods to enhance oil extraction from early-season "Hass" avocado fruit.

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Electrical Impedance Studies on Potato and Alfalfa Tissue

Cited by 167 publications

References 15 publications

Effect of Cold Acclimation on Bulk Tissue Electrical Impedance

Effect of Cold Acclimation on Bulk Tissue Electrical Impedance

Relationship between the Electrical and Rheological Properties of Potato Tuber Tissue after Various Forms of Processing

Cellular Changes in “Hass” Avocado Mesocarp During Cold‐Pressed Oil Extraction

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