Response of Stomatal Conductance to Vapor Pressure Deficit in Leaves of Four Trees at the Campus of Shandong University

Jing Li; Xiao Guang Wang; Gui Zhai Zhang; Xue Wei Hou; Xiao Ming Li

doi:10.4028/www.scientific.net/AMM.522-524.1055

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 522-524Response of Stomatal Conductance to Vapor Pressure...

Response of Stomatal Conductance to Vapor Pressure Deficit in Leaves of Four Trees at the Campus of Shandong University

Abstract:

Response of gas exchange to VPD in leaves of four trees (Prunus serrulata, Prunus lannesiana, Populus deltoides I-69 (I-69) and Populus × euramericana Neva (I-107)) at the campus of Shandong University in Jinan, Shandong Province were measured. The result showed that: the stomatal conductance increased with increasing VPD, and g_s reached g_s-max at intermediate VPD, and a steady decline in g_s with further increases in VPD. This response pattern was fitted by a parabolic curve (g_s=aD²+bD+c, D=VPD, R²>0.52). The g_s-max at intermediate VPD with changing VPD showed that there was an optimal VPD (or RH) to plants. Therefore, while VPD (or RH) was higher or lower than the optimal VPD (or RH) of plant, g_s would decrease. The response of g_s to VPD in I-69 and I-107 were much more sensitive than P. serrulata and P. lannesiana.

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Periodical:

Applied Mechanics and Materials (Volumes 522-524)

Pages:

1055-1058

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.522-524.1055

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Online since:

February 2014

Authors:

Jing Li, Xiao Guang Wang, Gui Zhai Zhang, Xue Wei Hou, Xiao Ming Li*

Keywords:

Photosynthetic Rate, Stomatal Conductance, Transpiration Rate, Vapor Pressure Deficit

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* - Corresponding Author

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