Authors: ZP Ye Q Yu
Publish Date: 2008/12/10
Volume: 46, Issue: 4, Pages: 637-640
Abstract
The model couples stomatal conductance g s and net photosynthetic rate P N describing not only part of the curve up to and including saturation irradiance I max but also the range above the saturation irradiance Maximum stomatal conductance g smax and I max can be calculated by the coupled model For winter wheat Triticum aestivum the fitted results showed that maximum P N P max at 600 µmol mol−1 was more than at 350 µmol mol−1 under the same leaf temperature which can not be explained by the stomatal closure at high CO2 concentration because g smax at 600 µmol mol−1 was less than at 350 µmol mol−1 The irradianceresponse curves for winter wheat had similar tendency eg at 25 °C and 350 µmol mol−1 both P N and g s almost synchronously reached the maximum values at about 1 600 µmol m−2 s−1 At 25 °C and 600 µmol mol−1 the I max corresponding to P max and g smax was 2 080 and 1 575 µmol m−2 s−1 respectively
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