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Plant Physiol. Feb 1971; 47(2): 204–208.
PMCID: PMC365842

Relationship of Electrical Conductance at Two Frequencies to Cold Injury and Acclimation in Cornus stolonifera Michx. 1

Abstract

The ratio of electrical conductance measured at two frequencies can be used to predict the cold hardiness of stem sections of Cornus stolonifera Michx. during the first stage of cold acclimation. Electrical conductance at 50 hertz divided by electrical conductance at 100 kilohertz gave a better estimate of hardiness than measurements at either frequency alone. The observed increase in the electrical conductance ratio as hardiness increased is consistent with an increase in membrane permeability. After plants were exposed to nonlethal frost, hardiness increased rapidly, and the relation between the conductance ratio and hardiness changed. This change indicates that ice crystallization induces a significant physiological alteration in the plants. Contrary to expectations, stem sections exposed to lethal temperatures could not consistently be separated from sections exposed to nonlethal temperatures by electrical conductance ratio measurements made immediately after thawing.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.
  • Plater CV, Greenham CG. A Wide-Range A.C. Bridge for Determining Injury and Death. Plant Physiol. 1959 Nov;34(6):661–667. [PMC free article] [PubMed]
  • McLeester RC, Weiser CJ, Hall TC. Multiple freezing points as a test for viability of plant stems in the determination of frost hardiness. Plant Physiol. 1969 Jan;44(1):37–44. [PMC free article] [PubMed]
  • Weiser CJ. Cold Resistance and Injury in Woody Plants: Knowledge of hardy plant adaptations to freezing stress may help us to reduce winter damage. Science. 1970 Sep 25;169(3952):1269–1278. [PubMed]

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