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LIU Jin-Chun, ZHONG Zhang-Cheng, HE Yue-Jun, JIN Jing. Study on the Photosynthetic Dynamic and the Response to CO2 of Mahonia fortunei in the Limestone Zone in Chongqing[J]. Plant Science Journal, 2006, 24(2): 140-143.
Citation: LIU Jin-Chun, ZHONG Zhang-Cheng, HE Yue-Jun, JIN Jing. Study on the Photosynthetic Dynamic and the Response to CO2 of Mahonia fortunei in the Limestone Zone in Chongqing[J]. Plant Science Journal, 2006, 24(2): 140-143.
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Study on the Photosynthetic Dynamic and the Response to CO2 of Mahonia fortunei in the Limestone Zone in Chongqing

  • 1.

    Key Laboratory of Eco-environmnt in Three Gorges Reservoir Region(MOE), Southwest China University, Chongqing 400715, China

  • 2.

    Chongqing Key Laboratory of Plant Ecology and Resource Research in Three Gorges Reservoir Region, Southwest China University, Chongqing 400715, China

  • 3.

    School of Life Science, Southwest China University, Chongqing 400715, China

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  • Received Date: September 03, 2005
  • Revised Date: January 19, 2006
  • Published Date: April 24, 2006
    Graphical Abstract
    • Abstract
  • The photosynthetic characteristics of a shrub,Mahonia fortunei in the limestone area of Chongqing was studied by CI-310 portable photosynthesis system.The results showed as follows: The diurnal variation of Pn and Gs of M.fortunei was "twin-peaked" curves and appeared "photosynthetic depressed" in the noon that related to non-stomatal restriction factor.The diurnal variation of E was "singled-peaked" curve and that of WUE looked like an "L".The seasonal changes of Pn,E and Gs were all "twin-peaked" curves,but WUE appeared a "W" curve.In order to grow well in limestone area M.fortunei took a way of "low photosynthesis,low transpiration and high water use efficiency".The experiment of response of Pn to CO2 indicated that Pn increased with the rise of CO2 and CO2 compensation point was 90 μmol·mol-1 and CE was 0.0125,which caused that M.fortunei had slow grow speed.
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