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Accumulation of cell generations (cumulative growth) of N. lecointei in three pCO2 treatments over a period of 194 days. Accumulation of generations at 960 µatm was significantly lower compared with 280 and 390 µatm pCO2 at day 147*. Dotted vertical lines show the days where the culture flasks were acid-washed and autoclaved. Error bars represent standard error (n = 5). (Online version in colour.)
