Soluble sugars and membrane lipids in winter wheats (Triticum aestivum L.) during cold acclimation [cold hardiness]

adaptation azucares carbohydrate content cells cellule cereal crops cold contenido de carbohidratos cultivos de cereales cultivos de invierno culture d'hiver frio froid lipid content resistencia a la temperatura sucres sugars temperature resistance teneur en glucides teneur en lipides triticum aestivum winter crops