1College of Agriculture, Henan University of Science and Technology, Luoyang 471003, China 2South China Agricultural University, Guangzhou 510642, China
Photorespiration involves oxygen uptake and CO2 release in light. The photorespiration of C3 plants may consume 25% of the carbon fixed by photosynthesis, so engineering photorespiration could improve photosynthesis. Screening and use of photorespiration mutants is the best way to study the metabolism and functions of photorespiration. This review covers the research progress in selection and use of photorespiratory mutants for clarifying the metabolic pathway and functions of photorespiration.