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Effect of Elevated CO2 Concentration on Leaf Photosynthesis in Sanjiang-Deyeuxia angustifolia

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Abstract:

Deyeuxia angustifolia were grown under three different levels of CO2 concentration conditions, 370μmol mol-1(ambient CO2), 550μmol mol-1(elevated CO2) and 700μmol mol-1(elevated CO2) respectively. We investigated the responses of photosynthesis and growth of D.angustifolia under different CO2 concentration conditions. Leaf photosynthesis and chlorophyll content were checked. The results showed that the values of net photosynthetic rate (Pn), stomatal conductance (Gs), intercellular CO2 concentration (Ci), transpiration (E), chlorophyll content were influenced by the elevated CO2 concentrations. The photosynthetic parameters changed in parallel with CO2 enrichment. CO2 enrichment in short term improved the photosynthetic ability of leaves, whereas the capacity was weakened under long-term elevated CO2 concentration condition. The leaves of D.angustifolia grown under elevated CO2 concentrations at the end of growth, had lower Pn, Gs, Ci, E and chlorophyll content than those grown and measuered under ambient CO2 concentration. The results indicated that D.angustifolia appeared photosynthetic acclimation.

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Periodical:

Advanced Materials Research (Volumes 726-731)

Pages:

305-309

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.726-731.305

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Online since:

August 2013

Authors:

Ming Yi Xu*, Ao Xue Wang, Hong Wei Ni

Keywords:

Biomass Accumulation, CO2 Enrichment, Deyeuxia angustifolia, Photosynthesis

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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