I came across the definition of photorespiration as a process that forms CO2 from O2 in the presence of light. However, the CO2 is released only when the plant cell undergoes the conversion of glycolate to PGA, i.e in the glycolate pathway.
Most textbooks seem to use the term photorespiration and glycolate pathway interchangeably, but then they seem to say that the glycolate pathway evolved to regain the energy lost in the formation of glycolate, whereas photorespiration is wasteful. How is this possible?
Shouldn't photorespiration be a conservation pathway as well? It is trying to regain lost energy from glycolate, isn't it? or Have I got the two terms completely confused?