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Chinese Journal of Applied Ecology ›› 2001, Vol. ›› Issue (1): 27-30.

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Ecophyslological response of Pinus koraiensis seedlings to elevated CO2

HAN Shijie, ZHOU Yumei, WANG Chenrui, ZHANG Junhui, ZOU Chunjing   

  1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016
  • Received:2000-06-07 Revised:2000-08-03 Online:2001-01-25

Abstract: Studies on the ecophysiological response of Pinus koraiensis seedlings were conducted in open-top chambers which were controlled with CO2 concentration of about 500, 700μmol·mol-1 .The result shows that there were different responses in net photosynthetic rate, stomatal conductance at high CO2(500, 700μmol·mol-1), ambient CO2 concentrations.Under 500μmol·mol-1 CO2,the carboxylase activity of RuBP was the highest,the photosynthesis showed “up-ward”,the average daily net CO2 assimilation was the greatest,and the contents of chlorophyll, soluble sugars were the highest.While under 700μmol·mol-1 CO2,the photosynthesis showed “down-ward”, was lower than that of the control,and the enzyme activity, the contents of substances were the lowest.

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