reported that, at a higher partial pressure of CO2, the rate
of respiration was increased in some experiments. Therefore, the
rate of respiration under a high partial pressure of CO2 could be
increased. In addition, the stomatal opening speed is higher at a
high absolute humidity than at a low absolute humidity Since stomatal opening
may have a proportional effect on the rate of respiration, it
could be considered that the rate of respiration was increased under
elevated total pressure and low-absolute-humidity conditions