. Both analyses revealed that upon dehydration the contribution of the two slowest
components (lifetimes τ ~300 ms and ~60 ms), attributed to P700
•+ [FA/FB]•− recombination, decreased in parallel
with the increase of the fastest component (τ ~ 150 μs), and of additional distributed phases with intermediate lifetimes.
Dehydration at RT mimicked the effects of freezing water-glycerol PS I systems, suggesting an impairment of
PS I protein dynamics in the dry trehalose glass.