Discussion space 2: water activity and storage

The Genebank Standards suggest long-term storage at a relative humidity of 15 ± 3% RH. They also say that ideally, seeds should be stored in hermetically sealed packages. If the packages are hermetically sealed, does it matter what the relative humidity of the base store itself is? What advice would you give to the manager of a national genebank that does not have the facility to hermetically seal samples, but instead uses rubber-sealed jars?

water activity and long term storage 

 

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