诸葛菜试管苗的光合特性及其对CO_2浓度升高的响应

Photosynthetic Characteristics of Orychophragmus Plantlets and its Response to CO_2

用Li-840 CO2/H2O气体分析仪对诸葛菜试管苗的光合特性及其对CO2升高的响应进行研究。结果表明:诸葛菜试管苗的光合速率日变化不大,午间没有明显的“午休”现象。在不同光源下实际光合速率的比较,在相同的光强下LED-红光下的试管苗的光合速率最高,LED-蓝光次之。正常大气条件下,LED-蓝光在70μmol/(m2.s)光强下的诸葛菜试管苗的CO2饱和点为5 058μmol/mol,CO2补偿点为266μmol/mol。

The photosynthetic characteristics of Oryehophragmus plantlets and its response to CO2 were investigated with Li- 840 CO2/H2O gas analyzer. The results showed that the diurnal photosynthetic rate of Orychophragmus plantlets in sunny day was not significant. There was not a significant midday depression. Compared with the real photosynthetic rate under the different lights with the same light intensity, the real photosynthetic rate under LED-red was higher than under LED-blue. When LED-blue light intensity reached 70μmol/（m^2·s）, CO2 compensation point and CO2 saturation point were 266 μmol/mol and 5 058 μmol/mol, respectively. words