2008•Acta Agriculturae Boreali-SinicaRequires access

Light Intensity on Flag Leaf Photosynthetic Characteristics and Water Use of Two Spike-type Cultivars of Winter Wheat

Yonghua Wang

Abstract

Flag leaf photosynthetic characteristics and water use were investigated in different light intensity in two spike-type wheat(Triticum aestivum L.)varieties,Lankaoaizao 8 and Yumai 49.The results showed that,at anthesis,with increasing light intensity,there were increases in photosynthetic rate,stomatal conductance,transpiration rate and water use efficiency.They would decrease if light intensity was increased to a limited light intensity.But intercellular CO2 concentration decreased with increasing light intensity.Compared with Yumai 49,flag leaf of Lankaoaizao 8 had higher photosynthetic characteristics and water use in higher light intensity.

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Key concepts: Light intensity, Photosynthesis, Transpiration, Flag (linear algebra), Cultivar, Stomatal conductance, Anthesis, Intensity (physics)