PROCESSUS BIOLOGIQUES RESPONSABLES DE L'ACCUMULATION DU 99-TC PAR LES VEGETAUX
Considerable uncertainties are associated with the environmental behaviour of 99-Tc and particularly with its transfer from soils to plant. First results have shown that plants may play an important role in the environmental cycling but more information is needed before the dynamics of Tc uptake and distribution can be understood fully. Tc transfer factors from soil to plant vary with time and cultural conditions, and solution culture experiments do not always relate to transfer factors obtained in field conditions. Tc is accumulated in the leaves and mechanisms responsible for the Tc absorption seem to be in place for essential elements. The Tc behaviour has thus to be studied within the framework of the mineral nutrition of plants. The scope of the present investigation was to study the influence of ecological conditions (light intensity, transpiration level and mineral composition of the nutrient solution) on the accumulation of Tc by plants).
Références bibliographiques: SCIENTIFIC SEMINAR ON THE BEHAVIOUR OF TC IN THE ENVIRONMENT, CADARACHE (FRANCE) OCT. 23-26, 1984 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER F 31772 ORA
Disponibilité: Can be ordered online
Numéro d'enregistrement: 1989123029200 / Dernière mise à jour le: 1987-01-01
Langues disponibles: fr