%0 Journal Article %T Regulation of Nitrate Uptake in Green Algae and Duckweeds Effect of Starvation and Induction %A Ullrich, W. R. %A Schmitt, H.-D. %A Arntz, E. %A , %J Proceedings in Life Sciences, Biology of Inorganic Nitrogen and Sulfur %P 244-251 %@ 0172-6625 %D 1981-01-01 %I Springer Berlin Heidelberg %~ DeepDyve