【摘要】 以大气CO₂浓度和温度升高为主要特征的气候变化已成为全球关注的焦点问题，极大地影响作物生产。光合作用是作物产量形成的基础，CO₂是植物光合作用的底物。大气CO₂浓度升高会促进C₃作物的光合能力，而大气温度升高通常限制作物光合能力。两种环境因素同时升高对作物光合生理机制的影响尚不明确。本文聚焦于大气CO₂浓度及温度单独升高，以及二者共同升高情景，重点解析了C₃作物光合速率、叶绿素含量、气孔开合度变化以及“光合驯化”现象。结合区域气候变化差异，阐述了大气CO₂浓度和温度同时升高下光合生理机制，旨在为提升C₃作物在气候变化条件下的光合能力及最终生产能力提供理论支持。更多还原

【Abstract】 Climate change, characterized by elevated atmospheric CO₂ concentration and rising temperature, has become a globally focused issue that has significantly impacted crop production. Photosynthesis serves as the foundation of crop yield formation, while CO₂ is the substrate for photosynthesis. The increased atmospheric CO₂ concentration can promote the photosynthesis of C₃ crops,while increased air temperature generally constrains crop photosynthetic ability. However, the combined effects of elevated atmospheric CO₂ concentration and temperature on the crop photosynthetic mechanisms remain unclear. Focusing on the separate and interactive effects of elevated atmospheric CO₂ concentration and temperature, this review analyzes the changes of photosynthetic rate, chlorophyll content and stomatal conductance, as well as the phenomenon of "photosynthetic acclimation" in various crops,particularly C₃ crops. Considering regional differences in climate change, it explores the photosynthetic physiological mechanisms under concurrent elevated CO₂ concentration and temperature, with the aim of providing theoretical support for enhancing the photosynthetic capacity and ultimate productivity of C₃ crops under climate change conditions.更多还原