Protonic conductivity in seeds has been studied by means of broad-band
dielectric relaxation spectroscopy and of various techniques of therm
ally stimulated currents over wide ranges of water contents, temperatu
re and frequency. Results are discussed in terms of percolative proton
transfer along threads of hydrogen-bonded water molecules and of a gl
ass transition occurring in the seed constituents, and in relation to
the emergence of biological functions in seeds. The work proposes, mor
eover, an alternative non-destructive method for the determination of
water content in biological materials.