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Bulletin of Botanical Research ›› 2011, Vol. 31 ›› Issue (4): 461-466.doi: 10.7525/j.issn.1673-5102.2011.04.013

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Comparison of 5 Species C4 Enzymes Activities, Pigments Contents and Chlorophyll Fluorescence Parameters in Leaf and Branch Chlorenchyma of 3 Species C3 Woody Plants

WANG Ying;WANG Wen-Jie;XU Hui-Nan;ZHENG Guang-Yu;SUN Wei;ZU Yuan-Gang*   

  1. Key Laboratory of Forest Plant Ecology of Northeast Forestry University,Ministry of Education,Harbin 150040
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-07-20 Published:2011-07-20
  • Contact: ZU Yuan-Gang
  • Supported by:

Abstract: All these 3 species of clove, poplar and larch showed that the contents of Chl.a+b in leaf were significantly higher than those in branch, Chl.a/b had no significant differences in clove and larch(p>0.05), but Chl.a/b in branch of poplar was significantly lower than that in leaf(p<0.05). When expressed as unit of chlorophyll, the activities of PEPC, PEPCK, PPDK, NADP-ME, NADP-MDH in branch of clove were respectively 2.4 times, 4.1 times, 3.2 times, 4.5 times and 1.9 times of those in leaf; in branch of poplar were respectively 2.1 times, 15 times, 6.3 times, 6.3 times and 2.8 times of those in leaf, and the corresponding values for larch were respectively 6.8 times, 6.3 times, 4.3 times, 4 times and 5.5 times. However, the differences in enzymes activities between leaf and branch at fresh weight unit were much smaller comparing with so large differences in chlorophyll unit. Inter-species comparison showed that 5 enzymes in poplar leaf and branch were significantly higher than clove and larch. The fact that C4 enzymatic activities in branch chlorenchyma were much higher than leaf shows that C4 enzyme-related biochemical processes may exist in the woody chlorenchyma. Electronic transportation rate and PSⅡ efficiency of branch in clove and larch were greater than leaf and contrary tendency was found in poplar. Correlation analysis between photosynthetic parameters and C4 enzymes showed that the high C4 enzymatic activities generally had no influence on the chlorophyll fluorescence indices(p>0.05), indicating the complexity of C4 enzymes functions on the photosynthesis of branch chlorenchyma and C3 leaf.

Key words: chlorophyll, C4 enzyme, chlorophyll fluorescence parameters, inter-species differences, chlorenchyma in leaf and branch

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