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Photorespiration Redesigned

ABSTRACT

Photorespiration has been a target for crop improvement ever since the energy losses associated with this pathway were identified in the 1970s. However, recent research highlights the importance of photorespiration as a recycling pathway for the products of ribulose-1,5-bisphosphate (RuBP) oxygenation and its intimate interconnection with primary metabolism. Nevertheless, reducing photorespiratory losses by installation of alternative salvage pathways in Arabidopsis (Arabidopsis thaliana) resulted in enhanced growth and biomass. Such approaches will probably also prove useful under field conditions, and in a future atmosphere containing higher CO2 concentrations combined with high temperature or limiting water.