The combined effects of CO2, ozone and drought on rubisco and nitrogen metabolism of young oak trees (Quercus petraea) A phytotron study

In this phytotron experiment we investigated the influence of increased CO2, O3 and drought on the content of soluble proteins and some enzymes of carbon and nitrogen metabolism. We found that the amounts of soluble proteins and the large subunit of the rubisco per fresh weight in young oak leaves declined under conditions of increasing levels of CO2 and after temporary water stress. The activities of nitrite reductase and glutamine synthetase were reduced when O3 and CO2 levels were raised.