Fig. 11. Comparison of the results of elevated total pressure and partial pressure
of CO2 under high humidity. “Base” is the standard rate of net photosynthesis at
0.1 MPa. The results indicate that the rate of net photosynthesis increased with an
increase in the partial pressure of CO2. The rate of net photosynthesis under elevated
total pressure decreased relative to that under the high partial pressure of CO2.