C₂ photosynthesis is a carbon concentrating mechanism that can increase net CO₂ assimilation by capturing, concentrating and re‐assimilating CO₂ released by photorespiration. Empirical and modelling studies indicate that C₂ plants assimilate more carbon than C₃ plants under high temperature, bright light, and low CO₂ conditions. I argue that engineering C₂ photosynthesis into C₃ crops is a promising approach to improve photosynthetic performance under these – and temporally heterogeneous – environments, and review the modifications that may re‐create a C₂ phenotype in C₃ plants. Although a C₂ engineering program would encounter many of the same challenges faced by C₄ engineering programmes, the simpler leaf anatomical requirements make C₂ engineering a feasible approach to improve crops in the medium term.

中文翻译：

---

C2光合作用：实现作物改良的有希望的途径？

c ^ _2个光合作用是碳浓缩机制，可以增加净CO ₂通过捕获同化，浓缩和再同化CO ₂通过光呼吸释放。实证和模型研究表明，在高温，强光和低CO ₂条件下，C ₂植物比C ₃植物吸收更多的碳。我认为将C ₂光合作用工程化为C ₃作物是改善在这些和时间异质环境下光合作用性能的有前途的方法，并回顾了可能在C _3中重新产生C ₂表型的修饰。植物。尽管C ₂工程计划会遇到C ₄工程计划面临的许多相同挑战，但较简单的叶片解剖要求使C ₂工程成为中期改善作物的可行方法。