Leaf O(2) uptake in the dark is independent of coincident CO(2) partial pressure.
Elevated CO(2), in the dark, is sometimes reported to inhibit leaf respiration, with respiration usually measured as CO(2) efflux. Oxygen uptake may be a better gauge of respiration because non-respiratory processes can affect dark CO(2) efflux in elevated CO(2). Two methods of quantifying O(2) uptake indicated that leaf respiration was unaffected by coincident CO(2) level in the dark.
Amthor
J S
JS
Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA. Amthor@aya.Yale.edu
Koch
G W
GW
Willms
J R
JR
Layzell
D B
DB
D002245:Carbon Dioxide / Q000032:analysis / Q000378:metabolism*; D003624:Darkness; D010100:Oxygen / Q000032:analysis / Q000378:metabolism*; D010101:Oxygen Consumption; D018515:Plant Leaves / Q000378:metabolism* / Q000502:physiology; D019664:Polygonaceae / Q000378:metabolism* / Q000502:physiology
D002245:Carbon Dioxide; D010100:Oxygen