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Effects of Dehydration on Freezing Characteristics and Survival in Liquid Nitrogen of Three Recalcitrant Seeds


Citation

Hor, Yue Luan and Stanwood, P. C. and Chin, H. F. (1990) Effects of Dehydration on Freezing Characteristics and Survival in Liquid Nitrogen of Three Recalcitrant Seeds. Pertanika, 13 (2). pp. 309-314.

Abstract / Synopsis

The recalcitrant seeds rambutan( Nephelium lappaceum). durian (Durio zibethinus) and cempedak (Artocarpus inleger) have a high critical moisture content (below which ·rapid loss of viability occurs of 27.0%, 26.0% and 37.9%,respectively. The critical moisture for embroys were higher at 39.0% for rambutan, 53.9% for durian and 43.2% for Cempedak. Differential Thermal analysis of the embroyos confirmed that their threshhold moistures (below which there is no freezable water) were lower than their critical moistureS. The Threshhold moistures for rambutan, durian and cempedak embryos were approximately 30%, 32% and 33% respectively. It is suggested that unsuccessful attempts at cryopreservation of embroyos of 'recalcitrant seeds in the past maybe due to the absence of safe window between the high critical moisture content and the threshhold moisture. This results in freezing injury at the higher moistures and dehydration injury' at the lower moistures. Potential techniques to overcome this and improve cryopreservation of recalcitrant seed embryos are discussed.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Agriculture
Keywords: recalcitrant seeds, cryopreservation
Depositing User: Nur Izyan Mohd Zaki
Date Deposited: 18 Nov 2009 10:16
Last Modified: 27 May 2013 15:03
URI: http://psasir.upm.edu.my/id/eprint/2813
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