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Plant Physiology 66:74-77 (1980) © 1980 American Society of Plant Biologists In Vivo Detection of Membrane Injury at Freezing TemperaturesRange Research Station, Agriculture Canada, Kamloops, British Columbia V2B 8A9 Canada The release of hydrogen cyanide from Amelanchier alnifolia was monitored at 30 C and 10 C following lethal freezing at both slow and fast rates. Assuming that hydrogen cyanide release indicates membrane damage, it was concluded that during a fatal freeze-thaw cycle membrane damage occurred during cell contraction and, therefore, was not dependent upon membrane area expansion during thawing.
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