Deep supercooling

[Nigel Gomm]

Can anyone offer any help. My physiology text books (Taiz & Zeiger) nor 
my Alberts, Bray et al go into any detail.

What is it within a cell that are used as freezing nuclei (aka "ice 
nucleation points")? My understanding is that bacteria on leaf surfaces 
may act as freezing nuclei and so cause frost damage. Does this mean that 
Chloroplasts and mitochondria can be freezing nuclei within a cell?
If so does a frost hardened cell purge itself of all MCs and chloroplasts?


Nigel Gomm                  
ngomm at cix.compulink.co.uk
100045.331 at compuserv.com 
--------------------------