摘要
研究了用开顶箱控制CO2 浓度在 5 0 0和 70 0 μmol·mol-1左右时红松幼苗的生理生态反应 .结果表明 ,高浓度CO2 (5 0 0、70 0 μmol·mol-1CO2 )和对照 (对照开顶箱、裸地 )条件下 ,红松幼苗的净光合速率与气孔导度之间的变化不同 .红松幼苗在 5 0 0 μmol·mol-1CO2 条件下 ,RuBPcase活性最高 ,呈现光合上调反应 ,日平均净光合速率最大 ,叶绿素及可溶性糖含量最高 ;而生长在 70 0 μmol·mol-1CO2 的红松幼苗呈现光合下调反应 ,光合作用明显低于对照植株 。
Studies on the ecophysiological response of Pinus koraiensis seedlings were conducted in open top chambers which were controlled with CO 2 concentration of about 500 and 700μmol·mol -1 .The result shows that there were different responses in net photosynthetic rate and stomatal conductance at high CO 2(500 and 700μmol·mol -1 ) and ambient CO 2 concentrations.Under 500μmol·mol -1 CO 2,the carboxylase activity of RuBP was the highest,the photosynthesis showed “up ward”,the average daily net CO 2 assimilation was the greatest,and the contents of chlorophyll and soluble sugars were the highest.While under 700μmol·mol -1 CO 2,the photosynthesis showed “down ward” and was lower than that of the control,and the enzyme activity and the contents of substances were the lowest.
出处
《应用生态学报》
CAS
CSCD
2001年第1期27-30,共4页
Chinese Journal of Applied Ecology
基金
中国科学院"百人计划"资助项目
国家自然科学基金!(30 0 70 1 58)
中国科学院陆地生态过程开放研究实验室基金资助项目
