of respiration (Fig. 6) and net photosynthesis (Fig. 8). The results
indicated that absolute humidity had an effect on the rate of gross
photosynthesis. At a high absolute humidity, the rates of gross
photosynthesis at elevated total pressure were equal to that at
0.1 MPa. At a low absolute humidity, the rate of gross photosynthesis
at 0.5 MPa was up to 1.7-fold higher in comparison with that
at 0.1 MPa.