Iron-mediated effects on nitrate reductase in marine phytoplankton

Authors :: Timmermans, K.R.
Stolte, W.
Baar, H.J.W. de
Source :: Marine Biology. Dec 31, 1994, Vol. 121 Issue 2, p389, 8 p.
Publication Year :: 1994
Abstract: Assay studies of the effects of enrichment and depletion of iron on nitrate reductase activity in Emiliania huxleyi, Isochrysis galbana and Tetraselmis sp. cultures show that iron-depletion incompletely inhibits nitrase reductase activity. Addition of iron enhances the enzyme activity in deficient cells. Potential nitrate reductase activities in the phytoplanktons are higher than actual nitrate uptake rates.