Open AccessFreezing of Nonwoody Plant Tissue
Author(s) -
Milford S. Brown,
E. Sa B. Pereira,
Bernard J. Finkle
Publication year - 1974
Publication title -
plant physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.554
H-Index - 312
eISSN - 1532-2548
pISSN - 0032-0889
DOI - 10.1104/pp.53.5.709
Subject(s) - plateau (mathematics) , supercooling , crystallization , freezing tolerance , ice crystals , ice formation , congelation , biophysics , chemistry , geology , materials science , mineralogy , biology , thermodynamics , atmospheric sciences , meteorology , physics , biochemistry , mathematical analysis , mathematics , organic chemistry , gene
Temperature recordings of the freezing of plant tissues include two plateaus or regions of reduced slope. During the second of these, small positive spikes were observed. When a completely frozen tissue was thawed and refrozen, neither the second plateau nor the spikes were recorded. Both were present, however, if the initial freezing had been terminated before the second plateau had been reached. The spikes appear to represent the release of heat of crystallization during the freezing of individual cells. Such a freezing and thawing cycle destroys the ability of the cells to remain supercooled in the presence of the ice that is formed as the first plateau is recorded.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom