JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2012, Vol. 36 ›› Issue (05): 71-76.doi: 10.3969/j.jssn.1000-2006.2012.05.013

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Effect of doubled CO2 concentration on photosynthesis characteristics of Lycium barbarum seedling

HOU Jingdong, CAO Bing*,SONG Lihua   

  1. School of Agriculture, Ningxia University, Yinchuan 750021,China
  • Online:2012-09-30 Published:2012-09-30

Abstract: To study the effects of double CO2 concentration ([CO2]) on photosynthesis characteristics in Lycium barbarum, the seedlings of L. barbarum were exposed to either ambient [CO2] ((350±20) μmol/mol) or elevated [CO2] ((700±20) μmol/mol) in an open top chamber for four months, and the net photosynthesis rate, transpiration rate, stomatal conductance, water utilization efficiency, light response curve, and CO2 response curve of L. barbarum were tested. The result showed that elevating [CO2] could increase the net photosynthesis rate, evaporation rate and stomatal conductance, as well as water utilization efficiency of L. barbarum seedling. With the incubation time extending, the light saturation point decreased, but light compensation point and CO2 saturation point increased.

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