Increased Rate of Net Photosynthetic Carbon Dioxide Uptake Caused by the Inhibition of Glycolate Oxidase

AUTOR(ES)

Zelitch, Israel

RESUMO

There is considerable variation among species in their rate of photorespiration, and photorespiration increases greatly at higher temperatures. The addition of an inhibitor of glycolate oxidase, α-hydroxy-2-pyridinemethanesulfonic acid, to tobacco leaf disks at 35° stimulated photosynthetic 14CO2 uptake at least 3-fold, but 14CO2 uptake was not changed by the inhibitor at 25°. The inhibitor did not increase photosynthesis in maize leaf disks at either temperature.

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