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Ecophysiological responses of 28 species of garden plants to atmospheric CO_(2) enrichment

Yuelin Jiang, Qingguo Zhang, Shuyun Yang, Shiding Zhang, Jian Wu

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Abstract

Based on analysis of net photosynthetic rate(Pn),stomatal conductance(Gs),transpiration rate(Tr) and water use efficiency(WUE),ecophysiological responses of 28 species of garden plants to CO_(2) enrichment were compared.The results showed that Pn and WUE were positive and Gs,Tr negative linearly correlated with a series of CO_(2) concentrations over 350 μmol·mol~(-1).The average Pn and WUE increased by 31.2% and 49.2%,the average Gs and Tr decreased by 16.5% and 11.7% at doubled CO_(2) level from 350 to 700 μmol·mol~(-1).The order of Pn and WUE from high to low was C_(3) plant, CAM plant,C_(4) plant with CO_(2) concentration increasing.

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What this paper is about

Based on analysis of net photosynthetic rate(Pn),stomatal conductance(Gs),transpiration rate(Tr) and water use efficiency(WUE),ecophysiological responses of 28 species of garden plants to CO_(2) enrichment were compared.The results showed that Pn and WUE were positive and Gs,Tr negative linearly correlated with a series of CO_(2) concentrations over 350 μmol·mol~(-1).The average Pn and WUE increased by 31.2% and 49.2%,the average Gs and Tr decreased by 16.5% and 11.7% at doubled CO_(2) level from 350 to 700 μmol·mol~(-1).The order of Pn and WUE from high to low was C_(3) plant, CAM plant,C_(4) plant with CO_(2) concentration increasing.

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Available abstract

Based on analysis of net photosynthetic rate(Pn),stomatal conductance(Gs),transpiration rate(Tr) and water use efficiency(WUE),ecophysiological responses of 28 species of garden plants to CO_(2) enrichment were compared.The results showed that Pn and WUE were positive and Gs,Tr negative linearly correlated with a series of CO_(2) concentrations over 350 μmol·mol~(-1).The average Pn and WUE increased by 31.2% and 49.2%,the average Gs and Tr decreased by 16.5% and 11.7% at doubled CO_(2) level from 350 to 700 μmol·mol~(-1).The order of Pn and WUE from high to low was C_(3) plant, CAM plant,C_(4) plant with CO_(2) concentration increasing.

Key concepts: Transpiration, Water-use efficiency, Stomatal conductance, Photosynthesis, Chemistry, Botany, Horticulture, Biology

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