Studies of the Volumetric Response of Snow Gum Bark to Freezing

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Abstract:

Changes in volume of fresh bark samples of snow gum were measured in an improvised dilatometer as they were cooled from 20° down to -10°C and then warmed again to room temperature. Rapid shrinkage was coincident with ice formation in the tissue and continued with cooling to approximately -8°C. The amount of shrinkage was closely related to volume of intercellular spaces. On warming from -10°C to 0°C, the pattern of recovery in tissue dimensions was essentially the reverse of shrinkage and was completed at 0°C. The results in all respects are consistent with the explanation of extracellular freezing in plant tissue and show conclusively that changes in dimensions of tree boles under freeze-thaw conditions are the product of that process in live bark and similar tissue. FOREST SCI. 23:337-342.

Keywords: Eucalyptus pauciflora; bark shrinkage; dendrometric measurements; extracellular freezing; freezing effects; recovery

Document Type: Journal Article

Affiliations: Division of Plant Industry, Commonwealth Scientific and Industrial Research Organization, P.O. Box 1600, Canberra City, A.C.T. 2601, Australia

Publication date: September 1, 1977

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
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