C3 和 C4 植物的光合作用对温度的适应：短草原中的一个可能的生态作用。
Photosynthetic adaptation to temperature in c(3) and c(4) grasses: a possible ecological role in the shortgrass prairie.
机构信息
Department of Botany and Biological Science, Washington State University, Pullman, Washington 99163.
出版信息
Plant Physiol. 1974 Nov;54(5):709-11. doi: 10.1104/pp.54.5.709.
Increasing pretreatment day temperatures of 20, 30, and 40 C resulted in decreased net photosynthesis in Agropyron smithii (C(3)) while in Bouteloua gracilis (C(4)) net photosynthesis was increased. The effect on photosynthesis of increasing analysis temperatures was the same as observed by increasing pretreatment temperatures. Resistance of the stomata and boundary layer were less affected by pretreatment temperatures than were the remaining resistances of a physical and chemical nature. Resistances for A. smithii were increased and those for B. gracilis were decreased by increasing pretreatment temperatures. Phenology of the species in the shortgrass prairie is such that A. smithii has its greatest growth activity during the cool portion of the growth season, whereas B. gracilis is most active in the warm portion. Thus, photosynthetic adaptation to temperature is strongly suggested as a strategy for ecosystem utilization by reduction of interspecific competition.
预处理温度分别升高 20、30 和 40°C 导致冰草（C3）的净光合作用降低，而芨芨草（C4）的净光合作用增加。升高分析温度对光合作用的影响与升高预处理温度时观察到的结果相同。与物理和化学性质的其余阻力相比，预处理温度对气孔和边界层的阻力的影响较小。预处理温度的升高增加了冰草的阻力，而降低了芨芨草的阻力。短草草原物种的物候学表明，冰草在生长季节的凉爽部分具有最大的生长活性，而芨芨草在温暖部分最为活跃。因此，强烈建议通过减少种间竞争来适应温度的光合作用作为生态系统利用的策略。
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