Journal of Experimental Botany, Vol. 51, No. 90001, pp. 319-328,
February 2000
© 2000 Oxford University Press
Modelling photosynthesis and its control
School of Biological and Molecular Sciences, Oxford Brookes University, Headington, Oxford OX3 0BP, UK
The dynamic and steady-state behaviour of a computer simulation of the Calvin cycle reactions of the chloroplast, including starch synthesis and degradation, and triose phosphate export have been investigated. A major difference compared with previous models is that none of the reversible reactions are assumed to be at equilibrium. The model can exhibit alternate steady states of low or high carbon assimilation flux, with hysteresis in the transitions between the steady states induced by environmental factors such as phosphate and light intensity. The enzymes which have the greatest influence on the flux have been investigated by calculation of their flux control coefficients. Different patterns of control are exhibited over the assimilation flux, the flux to starch and the flux to cytosolic triose phosphate. The assimilation flux is mostly sensitive to sedoheptulose bisphosphatase and Rubisco, with the exact distribution depending on their relative activities. Other enzymes, particularly the triose phosphate translocator, become more influential when other fluxes are considered. These results are shown to be broadly consistent with observations on transgenic plants.
Key words: Computer modelling, photosynthesis, genetic manipulation techniques.
CiteULike 
Connotea 
Del.icio.us What's this?
This article has been cited by other articles:
|
|
 |
|
  X.-G. Zhu, E. de Sturler, and S. P. Long Optimizing the Distribution of Resources between Enzymes of Carbon Metabolism Can Dramatically Increase Photosynthetic Rate: A Numerical Simulation Using an Evolutionary Algorithm Plant Physiology, October 1, 2007; 145(2): 513 - 526. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 E. M. Heizer Jr, D. W. Raiford, M. L. Raymer, T. E. Doom, R. V. Miller, and D. E. Krane Amino Acid Cost and Codon-Usage Biases in 6 Prokaryotic Genomes: A Whole-Genome Analysis Mol. Biol. Evol., September 1, 2006; 23(9): 1670 - 1680. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 M. G. Poolman, H. E. Assmus, and D. A. Fell Applications of metabolic modelling to plant metabolism J. Exp. Bot., June 1, 2004; 55(400): 1177 - 1186. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J. W. White and G. Hoogenboom Gene-Based Approaches to Crop Simulation: Past Experiences and Future Opportunities Agron. J., January 1, 2003; 95(1): 52 - 64. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D. W. Lawlor Carbon and nitrogen assimilation in relation to yield: mechanisms are the key to understanding production systems J. Exp. Bot., April 15, 2002; 53(370): 773 - 787. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 B. L. Triggs-Raine, R. D. Kirkpatrick, S. L. Kelly, L. D. Norquay, P. A. Cattini, K. Yamagata, A. J. G. Hanley, B. Zinman, S. B. Harris, P. H. Barrett, et al. HNF-1alpha G319S, a transactivation-deficient mutant, is associated with altered dynamics of diabetes onset in an Oji-Cree community PNAS, April 2, 2002; 99(7): 4614 - 4619. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
H. Ölçer, J. C. Lloyd, and C. A. Raines Photosynthetic Capacity Is Differentially Affected by Reductions in Sedoheptulose-1,7-Bisphosphatase Activity during Leaf Development in Transgenic Tobacco Plants Plant Physiology, February 1, 2001; 125(2): 982 - 989. [Abstract] [Full Text]
|
|
|
|
|
|
B. L. Triggs-Raine, R. D. Kirkpatrick, S. L. Kelly, L. D. Norquay, P. A. Cattini, K. Yamagata, A. J. G. Hanley, B. Zinman, S. B. Harris, P. H. Barrett, et al. HNF-1alpha G319S, a transactivation-deficient mutant, is associated with altered dynamics of diabetes onset in an Oji-Cree community PNAS, April 2, 2002; 99(7): 4614 - 4619. [Abstract] [Full Text] [PDF]
|
|