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. 1984 Jul;75(3):720–725. doi: 10.1104/pp.75.3.720

Freezing Characteristics of Cultured Catharanthus roseus (L). G. Don Cells Treated with Dimethylsulfoxide and Sorbitol in Relation to Cryopreservation 1

Tony H H Chen 1,2, Kutty K Kartha 1,2, Friedrich Constabel 1,2, Lawrence V Gusta 1,2
PMCID: PMC1066983  PMID: 16663694

Abstract

The freezing behavior of dimethylsulfoxide (DMSO) and sorbitol solutions and periwinkle (Catharanthus roseus) cells treated with DMSO and sorbitol alone and in combination was examined by nuclear magnetic resonance and differential thermal analysis. Incorporation of DMSO or sorbitol into the liquid growth medium had a significant effect in the temperature range for initiation to completion of ice crystallization. Compared to the control, less water crystallized at temperatures below −30°C in DMSO-treated cells. Similar results were obtained with sorbitol-treated cells, except sorbitol had less effect on the amount of water crystallized at temperatures below −25°C. There was a close association between the per cent unfrozen water at −40°C and per cent cell survival after freezing for 1 hour in liquid nitrogen. It appears that, in periwinkle suspension cultures, the amount of liquid water at −40°C is critical for a successful cryopreservation. The combination of DMSO and sorbitol was the most effective in preventing water from freezing. The results obtained may explain the cryoprotective properties of DMSO and sorbitol and why DMSO and sorbitol in combination are more effective as cryoprotectants than when used alone.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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