Phototrophic organisms harbor two main bioenergetic hubs, photosynthesis and respiration, and these processes dynamically exchange and share metabolites to balance the energy of the cell. In microalgae and cyanobacteria, the crosstalk between the light-triggered reactions of photosynthesis and respiration is particularly prominent with respiratory O₂ uptake which can be stimulated upon illumination. Since its discovery, this light-enhanced respiration has been proposed to be critical in dissipating the excess reducing power generated by photosynthesis. Importantly, the physiological role and putative molecular mechanism involved have just recently started to be understood. Here, we revisit the physiological functions and discuss possible molecular mechanisms of interactions between the photosynthetic and respiratory electron flows in microalgae and cyanobacteria.

光养生物拥有两个主要的生物能量中心：光合作用和呼吸，这些过程动态交换和共享代谢物以平衡细胞的能量。在微藻和蓝藻中，光触发的光合作用和呼吸反应之间的串扰在光照下可刺激呼吸性O _{2吸收方面尤为突出。}自发现以来，这种光增强呼吸作用被认为对于消散光合作用产生的过量还原能力至关重要。重要的是，相关的生理作用和假定的分子机制最近才开始被人们所理解。在这里，我们重新审视微藻和蓝藻的生理功能，并讨论光合作用和呼吸电子流之间相互作用的可能分子机制。