Abstract
The aim of this work was to investigate the mechanism of formation of triose phosphates and 3-phosphoglycerate during photosynthetic induction in leaves of Zea mays. Simultaneous measurements of gas exchange, chlorophyll a fluorescence and metabolite contents of maize leaves were made. Leaves illuminated in the absence of CO2 showed a build-up of triose phosphates during the first 2 min of illumination which was comparable to the build-up observed in the presence of CO2. Isolated mesophyll protoplasts, which lack the Calvin cycle, also showed a build-up of triose phosphates upon illumination. Leaves contained amounts of phosphoglycerate mutase and enolase adequate to account for the formation of triose phosphates and 3-phosphoglycerate from intermediates of the C4 cycle and their precursors.
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Furbank, R.T., Leegood, R.C. Carbon metabolism and gas exchange in leaves of Zea mays L.. Planta 162, 457–462 (1984). https://doi.org/10.1007/BF00393459
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DOI: https://doi.org/10.1007/BF00393459