All measurements of intact leaf 02 sensitivity can be explained by the oxygenation model for glycolate formation and glycolate metabolism by established pathways. Predicting the rate of oxygenation from the underlying biochemistry is more reliable than calculating the rate of oxygenation from intact leaf gas exchange measurements. REFERENCES 1. Badger MR, TD Sharkey, S von Caemmerer: The relationship between steady-state gas exchange of bean leaves and the levels of carbon reduction cycle intermediates. Planta 160:305-313, 1984. 2. Bowes, G, WL Ogren, RH Hageman: Phosphoglycolate production catalyzed by ribulose diphosphate carboxylase. Biochem. Biophys. Res. Commun. 45:716-722, 1971. 3. Farquhar GD, S von Caemmerer, JA Berry: A biochemical model of photosynthetic C02 assimilation in leaves of C3 species. Planta 149: 78-90, 1980. 4. Farquhar GD, S von Caemmerer: Modelling of photosynthetic response to environmental conditions. In OL Lange, PS Nobel, CB Osmond, H Ziegler, eds, Encycl. of Plant Physiol., New Series, Springer Verlag, Heidelberg 12b: 549-587, 1982. 5. Jordan DB, WL Ogren: The C02/02 specificity of ribulose 1- bisphosphate carboxylase/oxygenase. Dependence on ribulose bisphosphate concentration, pH and temperature. Planta 161: 308-313, 1984. 6. Ku SB, GE Edwards: Oxygen inhibition of photosynthesis. I. Temperature dependence and relation to 02/C02 solubility ratio. Plant Physiol 59: 986-990, 1977. 7. Laing WA, WL Ogren, RL Hageman: Regulation of soybean net photosynthetic C02 fixation by the interaction of C02' 02 and ribulose l,5-diphosphate carboxylase. Plant Physiol 54: 678-685, 1974.
