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Figure 5


Fig. 5. Assessment of HCO3– dependency for Na+ uptake by bled and un-bled L. stagnalis as tested under control (sodium bicarbonate) and treatment (NaCl, sodium gluconate or sodium sulfate) conditions. Each treatment medium contained 500 µmol l–1 of Na+. Differences between un-bled and bled conditions within treatments were significantly different. There were no significant differences among sodium treatment groups in un-bled or bled conditions. N=10 in all cases except control (NaCl, N=8) and sodium gluconate treatment (N=9). Values are means ± s.e.m.





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