Abstract: | p. 383, Figure 2. The legend to Figure 2 should read: Fig. 2. Cumulative urea-N taken up as % total cellular N vs.time of incubation for T. pseudonana. Closed symbols = ureauptake; open symbols =urea uptake in the presence of NH4+. = pre-depletion (NO2 ] in culture medium = 5.0 µg-atomNO2-N 11 ), = at depletion, = post-depletion(16 h after nitrogenous nutrient could no longer be detectedin culture medium). |