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FREEZING AVOIDANCE BY DEEP UNDERCOOLING OF TISSUE WATER IN WINTER-HARDY PLANTS.

Author(s) : GEORGE M. F., BECWAR M. R., BURKE M. J.

Type of article: Article

Summary

FREEZING AVOIDANCE BY DEEP UNDERCOOLING OF TISSUE WATER TO NEAR ITS HOMOGENEOUS NUCLEATION TEMPERATURE [APPROXIMATELY 233 K (-40 DEG C)] HAS RECENTLY BEEN SHOWN TO BE AN IMPORTANT SURVIVAL MECHANISM IN REPRODUCTIVE AND VEGETATIVE PARTS OF MANY WINTER-HARDY PLANTS. BIOPHYSICAL EXPERIMENTS WHICH SUPPORT THE CONCEPT OF UNDERCOOLING OF THE TISSUE WATER INCLUDE THERMAL ANALYSES, NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY, AND LOW-TEMPERATURE MICROSCOPY OF TISSUE FREEZING. ALL THESE EXPERIMENTS SUGGEST THAT IN PLANT PARTS THAT UNDERCOOL, TISSUE WATER IS COMPARTMENTALIZED AND IS NOT REMOVED TO EXTRACELLULAR ICE AS TISSUE TEMPERATURE DECLINES.

Details

  • Original title: FREEZING AVOIDANCE BY DEEP UNDERCOOLING OF TISSUE WATER IN WINTER-HARDY PLANTS.
  • Record ID : 1983-1774
  • Languages: English
  • Source: Cryobiology - vol. 19 - n. 6
  • Publication date: 1982

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