Polyamines and sterols in Cichorium heads

achicoria age biochemistry biochimie calidad chemical composition chicory cichorium intybus composition chimique cosecha edad endive espermidina esteroles etapas de desarrollo de la planta fisiologia vegetal harvesting metabolism metabolisme metabolismo plant developmental stages plant physiology poliaminas polyamine polyamines putrescina putrescine quality spermidine sterol sterols