Assimilation of ethylenediamine as nitrogen source by the cyanobiont Nostoc ANTH.

Nostoc ANTH metabolizes ethylenediamine (EDA) as sole nitrogen source but not as a carbon source. EDA is assimilated by the glutamine synthetase-glutamate synthase pathway. EDA represses heterocyst formation and nitrogenase activity but this is reversed by L-methionine-DL-sulphoximine.