Photosynthesis Research

, Volume 39, Issue 3, pp 413–425

Acclimation of photosynthetic proteins to rising atmospheric CO2

  • Andrew N. Webber
  • Gui-Ying Nie
  • Stephen P. Long
Terrestrial photosynthesis Minireview

DOI: 10.1007/BF00014595

Cite this article as:
Webber, A.N., Nie, GY. & Long, S.P. Photosynth Res (1994) 39: 413. doi:10.1007/BF00014595

Abstract

In this review we discuss how the photosynthetic apparatus, particularly Rubisco, acclimates to rising atmospheric CO2 concentrations (ca). Elevated ca alters the control exerted by different enzymes of the Calvin cycle on the overall rate of photosynthetic CO2 assimilation, so altering the requirement for different functional proteins. A decreased flux of carbon through the photorespiratory pathway will decrease requirements for these enzymes. From modeling of the response of CO2 uptake (A) to intracellular CO2 concentration (ci) it is shown that the requirement for Rubisco is decreased at elevated ca, whilst that for proteins limiting ribulose 1,5 bisphosphate regeneration may be increased. This balance may be altered by other interactions, in particular plasticity of sinks for photoassimilate and nitrogen supply; hypotheses on these interactions are presented. It is speculated that increased accumulation of carbohydrate in leaves developed at elevated ca may signal the ‘down regulation’ of Rubisco. The molecular basis of this ‘down regulation’ is discussed in terms of the repression of photosynthetic gene expression by the elevated carbohydrate concentrations. This molecular model is then used to predict patterns of acclimation of perennials to long term growth in elevated ca.

Key words

elevated CO2 gene expression Rubisco rbcL rbcS 

Copyright information

© Kluwer Academic Publishers 1994

Authors and Affiliations

  • Andrew N. Webber
    • 1
  • Gui-Ying Nie
    • 2
  • Stephen P. Long
    • 3
  1. 1.Department of Botany and Center for the Study of Early Events in PhotosynthesisArizona State UniversityTempeUSA
  2. 2.Department of Applied ScienceBrookhaven National LaboratoryUptonUSA
  3. 3.Department of BiologyUniversity of EssexColchesterUK

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