Effect of Choline Chloride on the Photosynthesis in Wheat Leaves

doi:10.3321/j.issn:1000-7091.1991.z1.001

Abstract

Abstract: The activities of the Hill reaction and ATPase of isolated chloroplast in wheat (Triticum aestivum) leaves could be increased by choline chloride. Meanwhile the activities of ribulose-1,5- bisphosphate carboxylase (E.C. 4 .1. 1.39) and glyceraldehyde- 3 - phosphate dehydrogenase ( E.C. 1 .2.1.13 ) in wheat leaves was found to be increased by choline chloride too. When choline chloride was introduced into the cytoplasm by vacuum infiltration method, the activity of ATPase was increased to 1.9 times and the activity of RuBPC-ase was increased to 1.7 times compared with that of the control. When choline chloride in suitable concentration was sprayed upon the wheat plants at different stages of development, the activities of the RuBPCase and G-3-PDH were higher than that of the control. It is possible that choline chloride was converted to phosphatidyl choline which caused an increase of the activity of the three enzymes. Higher concentrations of choline chloride appeared to inhibite the activities of these enzymes.The amounts of both protein and chlorophyll in the leaves were increased by choline chloride treatment. The pho-tosynthetic rate was increased by choline chloride too.The above data suggest that the effect of choline chloride may be pertained to both light reaction of photosynthesis and to the enzymes involved in dark reaction.

Key words: Choline chloride, Winter wheat, Hill reaction, ATPase, RuBP carboxylase, G- 3 -P dehydrogenase, Photosynthetic rate

FengFusheng, MaLigeng, FuJuan, GeDongxia. Effect of Choline Chloride on the Photosynthesis in Wheat Leaves[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1991, 6(S1): 1-8. doi: 10.3321/j.issn:1000-7091.1991.z1.001.

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