ISSN:
1432-2048
Keywords:
C4 photosynthesis
;
Chlorophyll a fluorescence
;
Enolase
;
Photosynthesis (induction)
;
Phosphoglycerate mutase
;
Zea (C metabolism, gas exchange)
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00393459
