Supercooling ability in apple seeds as affected by temperature-induced modifications in water relations in the seed parts [Pyrus malus, Malus domestica]

almacenamiento cell membranes contenido de humedad cooling embriones vegetales enfriamiento graine ion exchange malus membranas celulares membrane cellulaire moisture content permeabilidad permeability phosphatide phospholipids plant embryos potentiel hydrique pyrus refroidissement seeds semilla stockage storage teneur en eau water potential