Effects of potassium deficiency on cell water relations and elongation of tap and lateral roots of maritime pine seedlings

arbre forestier carence en substance nutritive cell walls crecimiento croissance deficiencias nutritivas forest trees growth nutrient deficiencies osmotic pressure pared celular paroi cellulaire pinus pinaster plant water relations plantule potasio potassium pression osmotique racine relaciones planta agua relation plante eau root systems roots seedlings sistema radicular turgencia turgescence turgor