Nitrate reductase and urease enzyme activity in the marine diatom

  title={Nitrate reductase and urease enzyme activity in the marine diatom},
  • Published 2003
The dissolved nitrogen pool in aquatic systems is comprised of many different nitrogen forms, both inorganic and organic. Interaction among these nitrogen forms at the level of uptake and enzyme activity is, with the exception of NH4 + and NO3 , not completely understood. Nitrate reductase (NR) and urease (UA) activities in the marine diatom Thalassiosira weissflogii (Grunow) Fryxell et Hasle were measured in NO3 , NH4 , and urea-sufficient cultures before and after challenge additions of NH4… CONTINUE READING


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