Ribulose Diphosphate Carboxylase regulates Soybean Photorespiration

Regeneration of Ribulose 1,5-bisphosphate and Ribulose 1,5-bisphosphate carboxylase/oxygenase Activity Associated with Lack of Oxygen Inhibition of Photosynthesis at Low Temperature

“…Fixation of one molecule of O 2 is followed by the release of half a molecule of CO 2 due to glycine decarboxylation in the glycolate pathway (Ogren and Chollet, 1982). Dark respiration is ignored.…”

Regulation of Soybean Net Photosynthetic CO2 Fixation by the Interaction of CO2, O2, and Ribulose 1,5-Diphosphate Carboxylase

“…This reversible inhibition is associated with the photosynthetic carbon reduction cycle (11), and the inhibition can be reduced by increasing the CO2 concentration, decreasing the 02 concentration, or by reducing the temperature (15,16). Direct inhibition of photosynthetic CO2 fixation has been explained by depletion of Calvin cycle intermediates, particularly the CO6 acceptor RuDP,4 which is presumed to occur because of the 02 stimulation of glycolate synthesis (21,23), or by competitive inhibition of RuDP carboxylase by 02 with respect to CO2 (6,20 (9,21,23,27). This reaction has been shown to occur in the light with chloroplast fragments (23).…”

William L. Ogren was honored with a Lifetime Achievement Award by the Rebeiz Foundation for Basic Research

“…As noted in the write-up by Archie Portis (see Ogren and Bowes 1971;Bowes et al 1971), the first observation that gave the idea that the same enzyme (known earlier as ''carboxydismutase'' in Melvin Calvin's lab) was responsible for reaction with CO 2 and O 2 evolved in the work of Bill Ogren with George Bowes, who was a postdoctoral associate at the University of Illinois at Urbana, Illinois. Although George was unable to attend the ceremony, he was invited by the two of us to present his story.…”