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Rate of CO2 assimilation of barley versus Ci at 10 °C (top) and 25 °C (bottom) with and without the addition of phosphate. A temperature-dependent increase in photosynthetic assimilation is observed upon addition of phosphate. Adapted by permission from Springer: Springer Planta. Limitation of photosynthesis by changes in temperature, Labate, CA, Leegood, RC, Copyright 1988.
