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Position: Home > Articles > Ecophysiological response of Pinus koraiensis seedlings to elevated CO_2. Chinese Journal of Applied Ecology 2001,12 (1) 27-30

红松幼苗对CO_2浓度升高的生理生态反应

作  者:
韩士杰;周玉梅;王琛瑞;张军辉;邹春静
单  位:
中国科学院沈阳应用生态研究所
关键词:
红松;CO2浓度;净光合速率;气孔导度;RuBP;叶绿素;可溶性糖
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 ,其酶活性及物质含量均最低
译  名:
Ecophysiological response of Pinus koraiensis seedlings to elevated CO_2.
作  者:
HAN Shijie, ZHOU Yumei,WANG Chen rui,ZHANG Junhui,ZOU Chunjing (Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016).
关键词:
Pinus koraiensis , Elevated CO 2, Net photosynthetic rate, Stomatal conductance, RuBP, Soluble sugar, Chlorophyll.
摘  要:
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.

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