Photosynthesis Research

, Volume 25, Issue 2, pp 83–100 | Cite as

The mechanisms contributing to photosynthetic control of electron transport by carbon assimilation in leaves

  • Christine Foyer
  • Robert Furbank
  • Jeremy Harbinson
  • Peter Horton
Mini Review

Abstract

‘Photosynthetic control’ describes the processes that serve to modify chloroplast membrane reactions in order to co-ordinate the synthesis of ATP and NADPH with the rate at which these metabolites can be used in carbon metabolism. At low irradiance, optimisation of the use of excitation energy is required, while at high irradiance photosynthetic control serves to dissipate excess excitation energy when the potential rate of ATP and NADPH synthesis exceed demand. The balance between ΔpH, ATP synthesis and redox state adjusts supply to demand such that the [ATP]/[ADP] and [NADPH]/[NADP+] ratios are remarkably constant in steady-state conditions and modulation of electron transport occurs without extreme fluctuations in these pools.

Key words

Photosynthesis Photosystem II Photosystem I Chlorophyll fluorescence Pi Benson-Calvin cycle metabolites 

Abbreviations

FBPase

Fructose-1,6-bisphosphatase

PS I

Photosystem I

PS II

Photosystem II

Pi

inorganic phosphate

PGA

glycerate 3-phosphate

PQ

plastoquinone

QA

the bound quinone electron acceptor of PS II

qP

Photochemical quenching of chlorophyll fluorescence associated with the oxidation of QA

qN

non-photochemical quenching of chlorophyll fluorescence

qE

non-photochemical quenching associated with the high energy state of the membrane

RuBP

ribulose-1,5-bisphosphate

TP

triose phosphate

Ф

intrinsic quantum yield of PS II

Ф

quantum yield of electron transport

Ф

quantum yield of CO2 assimilation

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Copyright information

© Kluwer Academic Publishers 1990

Authors and Affiliations

  • Christine Foyer
    • 1
  • Robert Furbank
    • 2
  • Jeremy Harbinson
    • 3
  • Peter Horton
    • 4
  1. 1.Laboratoire du MétabolismeI.N.R.A.VersaillesFrance
  2. 2.Division of Plant IndustryC.S.I.R.O.CanberraAustralia
  3. 3.ATO/AgrotechnologieWageningenThe Netherlands
  4. 4.Robert Hill Intitute, Department of Molecular Biology and BiotechnologyUniversity of SheffieldSheffieldUK

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