Interactive effects of temperature, carbon dioxide (CO₂), and watering regime on the reproductive yield of plants have not yet been fully understood. We grew Arabidopsis thaliana (wild-type (WT) and abi1-1, ABA-insensitive mutant) plants under two temperature regimes (22/18 °C and 28/24 °C; 16 h light/8 h dark), two CO₂ concentrations (400 and 700 μmol mol^–1), and two watering regimes (well-watered and water-stressed) for 34 days, and measured plant growth, reproductive yield and seed free amino acids. Plant growth and yield were decreased by higher temperatures and water stress, but aborted seed number was increased by water stress. Stem height and aborted seed number were decreased, but silique width and mass were increased, by elevated CO₂. Stem diameter, and silique width and mass were lowest in the water-stressed abi1-1 plants grown under higher temperatures at elevated CO₂. Under higher temperatures, elevated CO₂ and water stress, the abi1-1 plants produced seeds with lower amino acids than the WT plants. Most amino acids were increased by higher temperatures and elevated CO₂ than by water stress. Elevated CO₂ partially mitigated the adverse effects of stresses on some traits in both genotypes, with a larger extent in the WT plants than in the abi1-1 plants, and indirectly indicating the role of endogenous ABA in the process.

温度、二氧化碳 (CO ₂ ) 和浇水方式对植物生殖产量的交互作用尚未完全了解。我们长大拟南芥（野生型（WT）和abi1-1，ABA不敏感的突变体）的植物在两种温度状况（22/18℃，28/24℃; 16小时光照/ 8小时黑暗），两个CO _{2 种}浓度（400 和 700 μmol mol ^–1）和两种浇水方式（充分浇水和水分胁迫）持续 34 天，并测量植物生长、繁殖产量和无种子氨基酸。较高的温度和水分胁迫会降低植物的生长和产量，但水分胁迫会增加流产的种子数。由于 CO ₂升高，茎高和流产种子数减少，但长角果宽度和质量增加。茎直径、长角果宽度和质量在受水胁迫的abi1-1植物中最低，在升高的 CO ₂温度下生长。在较高温度、升高的 CO ₂和水分胁迫下，abi1-1植物产生的种子氨基酸比 WT 植物低。与水分胁迫相比，温度升高和 CO ₂升高会增加大多数氨基酸。升高的 CO ₂部分减轻了胁迫对两种基因型中某些性状的不利影响，在 WT 植物中的程度大于abi1-1植物，并间接表明内源 ABA 在该过程中的作用。