1932

Abstract

Photorespiration is a high-flux pathway that operates alongside carbon assimilation in C plants. Because most higher plant species photosynthesize using only the C pathway, photorespiration has a major impact on cellular metabolism, particularly under high light, high temperatures, and CO 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 HO in photosynthetic cells. Through HO 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.

Loading

Article metrics loading...

/content/journals/10.1146/annurev.arplant.043008.091948
2009-06-02
2024-06-18
Loading full text...

Full text loading...

/content/journals/10.1146/annurev.arplant.043008.091948
Loading
/content/journals/10.1146/annurev.arplant.043008.091948
Loading

Data & Media loading...

Supplementary Data

  • Article Type: Review Article
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error