Chen Genyun, Liao Yi, Cai Shiqing, Zeng Qing, Zhu Jianguo, Han Yong, Liu Gang, Xu Daquan
Institute of Plant Physiology and Ecology, Shanghai Institutes of Biological Sciences, Chinese Academy of Sciences, Shanghai 200032.
Ying Yong Sheng Tai Xue Bao. 2002 Oct;13(10):1201-4.
A comparative study was made between the leaves of Echinochloa crusgalli grown at 580 (FACE) and 380 (control, ambient air) mumol CO2 mol-1 air by observation of net photosynthetic rates (Pn) and the contents of soluble protein and the key enzyme of photosynthetic carbon assimilation, Rubisco. When measured at the ambient air CO2 concentration (380 mumol.mol-1), Pn were significantly lower in leaves grown under FACE conditions than that in those leaves grown in the ambient air. This indicates that photosynthetic acclimation to high CO2 occurs in the leaves grown under FACE conditions. Also, the stomatal conductance (Gs) and intercellular CO2 concentration (Ci) were decreased significantly in the leaves grown under FACE. The content of total soluble protein was much lower in the leaves grown under FACE conditions than that the in the control, and the content of Rubisco was also decreased in the FACE leaves, but the difference was not significant. From these results it is deduced that the photosynthetic acclimation to high CO2 in Echinochloa crusgalli leaves grown under FACE conditions is mainly related to the partial closure of stomata and the decrease in soluble protein containing some enzymes.
通过观察净光合速率（Pn）、可溶性蛋白质含量以及光合碳同化关键酶核酮糖-1,5-二磷酸羧化酶/加氧酶（Rubisco），对在580（自由空气CO₂浓度增高，FACE）和380（对照，环境空气）μmol CO₂·mol⁻¹空气条件下生长的稗草叶片进行了比较研究。在环境空气CO₂浓度（380 μmol·mol⁻¹）下测定时，FACE条件下生长的叶片Pn显著低于环境空气中生长的叶片。这表明在FACE条件下生长的叶片中发生了对高CO₂的光合适应。此外，FACE条件下生长的叶片气孔导度（Gs）和胞间CO₂浓度（Ci）显著降低。FACE条件下生长的叶片中总可溶性蛋白质含量远低于对照，FACE叶片中Rubisco含量也降低，但差异不显著。从这些结果可以推断，FACE条件下生长的稗草叶片对高CO₂的光合适应主要与气孔部分关闭以及含某些酶的可溶性蛋白质减少有关。
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