Studies on Photosynthesis of Flag Leaf of Wheat Cultivars with Big Kernels

doi:10.3321/j.issn:1000-7091.1991.z1.002

Abstract

Abstract: The physiological parameters of photosynthesis of flag leaf of winter wheat (Triticum aestivum) cultivars with big kernels were determined. The results indicated that there existed large differences in physiological properties of photosynthesis among different wheat genotypes. The means of apparent photosynthesis and photorespiration were 15.54±4.56mgCO2?dm-2?h-1 and 26.77%±9.19% respectively. High concentration of oxygen and high temperature inhibited photosynthesis by 43.26% and 43.25% respectively. In the contrast, low level of oxygen stimulated photosynthesis. As oxygen concentration decreased by 1 %, the photosynthesis rate increased byl.46%. Forty-one cultivars tested were classified into four groups by cluster analysis based on the parameters measured: Group 1 with high intensity of photosynthesis, Group 2 with low intensity of photosynthesis, Group 3 with photosynthesis resistant to stresses and Group 4 with photosynthesis sensitive to stresses.

Key words: Triticum aestivum, Photosynthesis, Cluster analysis

ZhangJingxian, LuMengyu, HanFengshan, JiLiang. Studies on Photosynthesis of Flag Leaf of Wheat Cultivars with Big Kernels[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1991, 6(S1): 9-14. doi: 10.3321/j.issn:1000-7091.1991.z1.002.

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