Plant Physiol. Journal of Pharmacology and Experimental Therapeutics
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Plant Physiology 64:675-678 (1979)
© 1979 American Society of Plant Biologists

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Articles

Proline: A Novel Cryoprotectant for the Freeze Preservation of Cultured Cells of Zea mays L

Lyndsey A. Withers1 and Patrick J. King

a Friedrich Miescher-Institut, Postfach 273, CH-4002 Basel, Switzerland2

Proline is an effective cryoprotectant for the storage of cultured cells of Zea mays L. in liquid N2. Increased freeze tolerance can be achieved by pregrowth for 3 to 4 days in medium containing proline. Cells cryoprotected with proline have an increased recovery potential when compared with cells cryoprotected with dimethylsulfoxide and glycerol. They also show a reduced postthaw viability loss and greater tolerance of a range of postthaw culture conditions. It is suggested that the mechanism of action of proline may be similar to that in its putative role of conferring protection against natural stresses. It may be protecting the cell against solution effects caused by dehydration during freezing. These findings are discussed in relation to other freeze tolerance enhancing treatments.

1 Present address: Botanical Laboratories, University of Leicester, Leicester, LE1 7RH, United Kingdom.

2 Reprint requests to be directed to this address.






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ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 1979 by the American Society of Plant Biologists