Fig. 2. Mean respiration rates during the dark periods and mean translocation rates for second trifoliolate leaves of soybeans exposed for three 24‐h periods to various [CO₂] during the dark periods, but 350 µmol mol^–1 [CO₂] during the light periods. Values are expressed relative to values of second trifoliolate leaves exposed to 370 µmol mol^–1 [CO₂] during the dark. Vertical bars indicate s.e.