Carbon Isotope Discrimination in Photosynthesis of CAM Plants

  title={Carbon Isotope Discrimination in Photosynthesis of CAM Plants},
  author={C. Barry Osmond and W. G. Allaway and B G Sutton and John H. Troughton and Orlando Queiroz and Ulrich E. L{\"u}ttge and Klaus Winter},
SUCCULENT plants capable of Crassulacean acid metabolism (CAM) show extremely variable carbon isotope discrimination ratios1,2. This ratio, usually expressed as a δ13C value referred to a standard3, has emerged as a useful diagnostic criterion to determine photosynthetic pathways in higher plants3–5. Species with the C4 photosynthetic pathway6 show less negative δ13C values than do species with the C3 photosynthetic pathway. The difference in isotope discrimination is believed to be a result of… CONTINUE READING