C₄ Photosynthesis and Light-dependent Accumulation of Inorganic Carbon in Leaves of C₃-C₄ Flaveria Species

Abstract

Various C₃,C₃-C₄ Flaveria Species were examined for their light-dependent ability to concentrate inorganic carbon (CO₂ plus HCO₃^-) within leaf discs. The five C₄ species concentrated 14-32 nmol of inorganic carbon per mg Chl (after reaching saturation with ¹⁴CO₂). Among the 10 C₃-C₄ species examined, six species showed a considerable capacity to concentrate inorganic carbon (8-31 nmol per mg Chl).