TY - JOUR
AU1 - PEISKER, M.
AB - Abstract Models developed to explain the biphasic response of CO2 compensation concentration to O2 concentration and the C3‐like carbon isotope discrimination in C3‐C4 intermediate species are used to characterize quantitatively the steps necessary in the evolution of C4 photosynthesis. The evolutionary stages are indicated by model outputs, CO2 compensation concentration and δ13C value. The transition from intermediate plants to C4 plants requires the complete formation of C4 cycle capacity, expressed by the models as transition from C4 cycle limitation by phosphoenolpyruvate (PEP) regeneration rate to limitation by PEP carboxylase activity. Other steps refer to CO2 leakage from bundle sheath cells, to further augmentations of C4 cycle components, to the repression of ribulose‐1,5‐bisphos‐phate carboxylase in the mesophyll cells, and to a decrease in the CO2 affinity of the enzyme. Possibilities of extending the suggested approach to other physiological characteristics, and the adaptive significance of the steps envisaged, are discussed.
TI - Models of carbon metabolism in C 3 ‐C 4 intermediate plants as applied to the evolution of C 4 photosynthesis
JF - Plant Cell & Environment
DO - 10.1111/j.1365-3040.1986.tb01620.x
DA - 1986-11-01
UR - https://www.deepdyve.com/lp/wiley/models-of-carbon-metabolism-in-c-3-c-4-intermediate-plants-as-applied-Gkrsi600Gs
SP - 627
VL - 9
IS - 8
DP - DeepDyve
ER -