Photorespiratory Metabolism: Genes, Mutants, Energetics, and Redox Signaling

DOI Web Site 10 Citations
  • Christine H. Foyer
    School of Agriculture, Food, and Rural Development, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom;
  • Arnold J. Bloom
    Department of Plant Sciences, University of California, Davis, California 95616;
  • Guillaume Queval
    Institut de Biotechnologie des Plantes, UMR-CNRS 8618, Université de Paris sud XI, 91405 Orsay CEDEX, France;,
  • Graham Noctor
    Institut de Biotechnologie des Plantes, UMR-CNRS 8618, Université de Paris sud XI, 91405 Orsay CEDEX, France;,

Search this article

Description

<jats:p> Photorespiration is a high-flux pathway that operates alongside carbon assimilation in C<jats:sub>3</jats:sub> plants. Because most higher plant species photosynthesize using only the C<jats:sub>3</jats:sub> pathway, photorespiration has a major impact on cellular metabolism, particularly under high light, high temperatures, and CO<jats:sub>2</jats:sub> or water deficits. Although the functions of photorespiration remain controversial, it is widely accepted that this pathway influences a wide range of processes from bioenergetics, photosystem II function, and carbon metabolism to nitrogen assimilation and respiration. Crucially, the photorespiratory pathway is a major source of H<jats:sub>2</jats:sub>O<jats:sub>2</jats:sub> in photosynthetic cells. Through H<jats:sub>2</jats:sub>O<jats:sub>2</jats:sub> production and pyridine nucleotide interactions, photorespiration makes a key contribution to cellular redox homeostasis. In so doing, it influences multiple signaling pathways, particularly those that govern plant hormonal responses controlling growth, environmental and defense responses, and programmed cell death. The potential influence of photorespiration on cell physiology and fate is thus complex and wide ranging. The genes, pathways, and signaling functions of photorespiration are considered here in the context of whole plant biology, with reference to future challenges and human interventions to diminish photorespiratory flux. </jats:p>

Journal

Citations (10)*help

See more

Details 詳細情報について

Report a problem

Back to top