Growth, gas exchange and water use efficiency of the facultative hemiparasite Rhinanthus minor associated with hosts differing in foliar nitrogen concentration

absorption d'eau absorption de substances nutritives alternative hosts chlorophylle chlorophylls clorofilas crecimiento croissance especies feuille growth hojas host parasite relations leaves nitrogen content nutrient uptake parasitic plants photosynthese photosynthesis plante parasite species teneur en azote trifolium pratense water uptake