Recovery of uptake and assimilation of nitrate in Scenedesmus sp. previously exposed to elevated levels of Cu2+ and Zn2+.

A study of the effects of elevated levels of Cu2+ and Zn2+ on NO3- uptake and nitrate reductase (NR) activity in Scenedesmus sp. was carried out. The two metals inhibited NR and NO3- uptake in a concentration-dependent manner, with the latter process being inhibited more strongly than the former.