Frost resistance and water status of winter rape leaves as affected by differential shoot/root temperature

adaptation brassica napus carbohidratos carbohydrates cold contenido de humedad cultivos de invierno culture d'hiver feuille frio froid frost gel glucide helada hojas induced resistance leaves moisture content phosphatide phospholipids potentiel hydrique proteine proteins racine resistencia a la temperatura resistencia inducida roots stems tallo temperature resistance teneur en eau tige water potential winter crops