比较分析了植物光合同化 CO2 速率、Rubisco活性等性状对长期和短期高浓度 CO2 的反应 .结果表明 :所研究的植物在高浓度 CO2 下生长 ,可以长期保持高的 CO2 同化速率 ;长期在高浓度 CO2 下生长植物的光合速率增加有两个来源 ,其一 ,是 ...比较分析了植物光合同化 CO2 速率、Rubisco活性等性状对长期和短期高浓度 CO2 的反应 .结果表明 :所研究的植物在高浓度 CO2 下生长 ,可以长期保持高的 CO2 同化速率 ;长期在高浓度 CO2 下生长植物的光合速率增加有两个来源 ,其一 ,是 CO2 浓度增加而增加的底物浓度效应 (Δ Pc) ,它的大小随外界短期 CO2 浓度改变而改变 ,其二 ,是植物光合系统结构改变而提高光合能量转换或是电子传递效率所产生的光合速率增加 (ΔPs) ,它的大小不随外界短期 CO2 浓度变化而改变。植物光合速率对大气 CO2展开更多
Seasonal changes in the photosynthetic characteristics of Ammopiptantus mongolicus (Maxim. )Chen f. were studied. When the net photosynthetic rate decreased with the elevation of air temperature, thestomatal conductan...Seasonal changes in the photosynthetic characteristics of Ammopiptantus mongolicus (Maxim. )Chen f. were studied. When the net photosynthetic rate decreased with the elevation of air temperature, thestomatal conductance and stomatal limitation value tended to decline simultaneously, while the interoellularCO2 concentration was increased. According to the two criteria discriminating the stomatal limitation of Photosynthesis suggeSted by Fmrquhar and Sharkey, the seasonal changes in these parameters indicated that the decrease in Pn may not be due to stomatal factor. These studies proved that the relative contents of the large subunit of Rubisco and the photochemical activities correlated with the seasonal changes in the net photosyntheticrate, whieh may show that these two factors contribute primarily to the seasonal changeS in CO2 assimilation.展开更多
文摘比较分析了植物光合同化 CO2 速率、Rubisco活性等性状对长期和短期高浓度 CO2 的反应 .结果表明 :所研究的植物在高浓度 CO2 下生长 ,可以长期保持高的 CO2 同化速率 ;长期在高浓度 CO2 下生长植物的光合速率增加有两个来源 ,其一 ,是 CO2 浓度增加而增加的底物浓度效应 (Δ Pc) ,它的大小随外界短期 CO2 浓度改变而改变 ,其二 ,是植物光合系统结构改变而提高光合能量转换或是电子传递效率所产生的光合速率增加 (ΔPs) ,它的大小不随外界短期 CO2 浓度变化而改变。植物光合速率对大气 CO2
文摘Seasonal changes in the photosynthetic characteristics of Ammopiptantus mongolicus (Maxim. )Chen f. were studied. When the net photosynthetic rate decreased with the elevation of air temperature, thestomatal conductance and stomatal limitation value tended to decline simultaneously, while the interoellularCO2 concentration was increased. According to the two criteria discriminating the stomatal limitation of Photosynthesis suggeSted by Fmrquhar and Sharkey, the seasonal changes in these parameters indicated that the decrease in Pn may not be due to stomatal factor. These studies proved that the relative contents of the large subunit of Rubisco and the photochemical activities correlated with the seasonal changes in the net photosyntheticrate, whieh may show that these two factors contribute primarily to the seasonal changeS in CO2 assimilation.
