JOURNAL OF CULTURE COLLECTIONS
Volume 2, 1997-1998

 

STUDIES ON VACUUM-DRYING FOR THE PRESERVATION
OF PLANT PATHOGENIC BACTERIA

 Maureen J. Fletcher and John M. Young*

International Collection of Microorganisms from Plants,
Landcare Research, Private Bag 92170, Auckland, New Zealand
 
 

Summary

        A comparison of freeze-drying and vacuum-drying of plant pathogenic bacteria showed no short-term differences in survival. Storage long term with vacuum-drying suggests that this simpler method offers similar survival rates to freeze-drying. A modification of the procedure in which the condenser is by-passed in the latter stages of drying offers the prospect of achieving lower pressures which are not limited by the vapour pressure of ice.
 

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