Relationship between the lipid content and the unfrozen water content of seeds of the four Citrus (open circles) species analysed in the present study, seven coffee (filled circles) species (Dussert et al., 2001), Azadirachta indica (Sacandé et al., 2000; filled square), pea (Vertucci, 1989a; open diamond), Quercus rubra (Pritchard and Manger, 1998; open triangle), Quercus robur (Sun, 1999; open square) and soybean (Vertucci, 1989a; filled triangle).