Table 2.

Response to [CO₂] during the dark periods of 3‐d on total net photosynthesis, respiration, change in dry mass, and translocation from second trifoliolate leaves of soybean over the 3‐d

Dark [CO2] (µmol mol–1)	Net photosynthesis (mg dry mass per leaflet)	Respiration	Change in mass	Translocation
220	411 ± 16	36 ± 2	47 ± 3	328 ± 13
370	388 ± 14	33 ± 3	56 ± 4	299 ± 11
700	376 ± 13	30 ± 3	73 ± 5	273 ± 9
1400	361 ± 9	27 ± 2	79 ± 3	255 ± 6

Values represent overall means (± s.e.) for three replicates, each consisting of four to six plants, except for the 1400 µmol mol^–1 CO₂ treatment when there were six replicates.