GLUTAMINE SYNTHETASE AND AMMONIUM ASSIMILATION IN ROOTS OF ZINC-TOLERANT AND NON-TOLERANT CLONES OF DESCHAMPSIA CESPITOSA (L.) BEAUV. AND ANTHOXANTHUM ODORATUM L.
Department of Biological Sciences, University of Exeter, Hatherly Laboratories, Prince of Wales Road, Exeter EX4 4PS, UK;Department of Botany and Microbiology, University College London, Gower Street, London WC1E 6BT, UK