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Plant Physiology 57:553-555 (1976)
© 1976 American Society of Plant Biologists

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Articles

Interrelations between Environmental Factors and Freezing Resistance of Cabbage Leaves

Wesley Coxa

Jacob Levittb,1

a Division of Biological Science, University of Missouri, Columbia, Missouri 65201, b Laboratory of Plant Hardiness, Department of Horticultural Science, University of Minnesota, St. Paul, Minnesota 55101

Rapid wilting of cabbage leaves (Brassica capitata L.), induced by excision of the shoot, induced as rapid and high a degree of freezing resistance as a similar period of hardening at low temperature. Maximum hardening in the leaf was generally associated with the maximum growth rate. On the other hand, exposure of the excised shoot to low temperature while immersed in aerated water failed to harden the plants. In the absence of light, abrupt wilting at room or low temperature induced little or no hardening. With the available equipment, which required the absence of light, freezing temperatures induced little or no hardening above that obtained by nonfreezing low temperature. In fact, the plant frozen at moderate temperatures showed a gradual but steady decrease in freezing resistance. Since these experiments were performed with plants grown in pots, and since they eventually became pot-bound, the results may not apply equally to field-grown plants.

1 To whom requests for reprints should be sent.




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 Proc. Natl. Acad. Sci. USAHome page
N. N. Artus, M. Uemura, P. L. Steponkus, S. J. Gilmour, C. Lin, and M. F. Thomashow
Constitutive expression of the cold-regulated Arabidopsis thaliana COR15a gene affects both chloroplast and protoplast freezing tolerance
PNAS, November 12, 1996; 93(23): 13404 - 13409.
[Abstract] [Full Text] [PDF]


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Copyright © 1976 by the American Society of Plant Biologists