Understanding the photosynthetic responses of terrestrial plants to environments with high levels of CO₂ is essential to address the ecological effects of elevated atmospheric CO₂. Most photosynthetic models used for global carbon issues are based on steady-state photosynthesis, whereby photosynthesis is measured under constant environmental conditions; however, terrestrial plant photosynthesis under natural conditions is highly dynamic, and photosynthetic rates change in response to rapid changes in environmental factors. To predict future contributions of photosynthesis to the global carbon cycle, it is necessary to understand the dynamic nature of photosynthesis in relation to high CO₂ levels.
    In this presentation, I focus on the effects of the photosynthetic response to changes in light intensity under experimentally elevated CO₂ conditions, and introduce following three outlines. 1) Overview of photosynthetic induction under high CO₂ conditions. 2) Dynamic light utilization efficiency of plant (i.e. carbon fixation efficiency). 3) Effects of two high CO₂ effect to dynamic photosynthesis, CO₂ supply effect (short-term response) and plant acclimation effect (long-term response). We will share about several knowledge gaps that should be addressed to aid future predictions of photosynthesis in high-CO₂ environments.