Plant Physiology 94:1078-1083 (1990)
© 1990 American Society of Plant Biologists
Molecular Biology and Gene Regulation
Cold Acclimation in Arabidopsis and Wheat 1
A Response Associated with Expression of Related Genes Encoding `Boiling-Stable' Polypeptides
Chentao Lin,
Wei Wen Guo,
Everett Everson and
Michael F. Thomashow
Department of Crop and Soil Sciences, Michigan State University, East Lansing, Michigan 48824-1325,
Department of Microbiology and Public Health, Michigan State University, East Lansing, Michigan 48824-1325,
Program in Genetics, Michigan State University, East Lansing, Michigan 48824-1325
Changes in gene expression occur during cold acclimation in a wide variety of plant species. Here we show that a number of the polypeptides encoded by cold-regulated (cor) genes of Arabidopsis thaliana L. (Heyn) and wheat share the unusual biochemical property that they remain soluble upon boiling in aqueous solution. Further, cDNA cloning in conjunction with Southern and Northern analyses indicate that wheat has a cor gene that is related to Arabidopsis cor47, a gene encoding a 47 kilodalton `boiling-stable' COR polypeptide. We suggest it is likely that the boiling-stable COR polypeptides have a fundamental role in plants acclimating to cold temperatures and discuss the possibility that they may act as cryoprotectants.
1 This work was supported by grants to M. F. T. from the U.S. Department of Agriculture Competitive Research Grants Office (88-37264-3880) and the Michigan Agricultural Experiment Station. W. W. G. was supported in part by a grant to E. E. from the Michigan State Millers Association.
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