Qu Xian-You, Sun Nian-Xi, Li Long-Yun, Zhong Guo-Yue, Yin Fu-Jun
Chongqing Academy of Chinese Materia Medica, Chongqing 400065, China.
Zhong Yao Cai. 2011 Mar;34(3):336-9.
Evaluate the photosynthesis characteristics of Coptis chinensis and provide theoretical basis for the optimization of Coptis chinensis germplasm resources and variety.
The daily variation of the net photosynthetic rate, transpiration rate, stomatal conductance and intercellular CO2 density in leaf blade were determined by Photosynthesis analyzer, and the net photosynthesis rate of Coptis chinensis from different plant ages, types and production places was compared.
The light saturation point in Coptis chinensis was about 500 micromol/m2 x s, light compensation point was about 12.04 micromol/(m2 x s), apparent quantum yield was 0.011. When the temperature was above 33 degrees C, the transpiration rate increased but the net photosynthesis rate decreased. There was no significant difference (P > 0.05) among the net photosynthesis rate of Coptis chinensis from different plant ages. The net photosynthesis rate of the type DA-YE and ZHI-HUA was significantly higher than that of other types (P < 0.05); The net photosynthesis rates of specimens from Fubao mountain in Lichuan county of Hubei and Fengmu village in Shizhu county of Chongqing were significantly higher than that of others.
The net photosynthesis rate of Coptis chinensis decreased under hight temperation and hight light. Different germplasm resources of Coptis chinensis, the net photosynthetic rate had certain differences.
评价黄连的光合特性，为黄连种质资源优化及品种选育提供理论依据。
用光合分析仪测定叶片净光合速率、蒸腾速率、气孔导度和胞间CO₂浓度的日变化，并比较不同株龄、类型及产地黄连的净光合速率。
黄连光饱和点约为500 μmol/m²·s，光补偿点约为12.04 μmol/(m²·s)，表观量子效率为0.011。温度高于33℃时，蒸腾速率升高但净光合速率下降。不同株龄黄连的净光合速率差异不显著（P>0.05）。大叶型和直花型黄连的净光合速率显著高于其他类型（P<0.05）；湖北利川福宝山和重庆石柱枫木乡的黄连样本净光合速率显著高于其他产地。
高温强光下黄连净光合速率下降。黄连不同种质资源的净光合速率存在一定差异。
