Root and shoot growth and chlorophyll content of Taraxacum officinale provenances as affected by defoliation and debudding under organic and hydroponic cultivation

agriculture biologique asteraceae chemical composition chlorophylle chlorophylls clorofilas compositae composition chimique cultivars cultivo protegido cultivo sin tierra cultural methods culture hydroponique culture sans sol culture sous abri defoliation disbudding drug plants hydroponics medicinal properties mode de culture organic farming peat plantas medicinales plante medicinale procedencia propiedades medicinales protected cultivation provenance racine roots soilless culture stems tallo taraxacum taraxacum officinale tige tourbe turba variedades varieties