Effect of inland salt-alkaline stress on C4 enzymes, pigments, antioxidant enzymes, and photosynthesis in leaf, bark, and branch chlorenchyma of poplars
作者： H. M. Wang , W. J. Wang , H. Z. Wang , Y. Wang , H. N. Xu
DOI: 10.1007/S11099-013-0008-3
关键词:
摘要: The effects of soil salt-alkaline (SA) stress on leaf physiological processes are well studied in the laboratory, but less is known about their effect leaf, bark and branch chlorenchyma no reports exist C4 enzymes field conditions. Our results demonstrated that activities enzymes, such as phospholenolpyruvate carboxylase (PEPC), NADP-malic enzyme (NADP-ME), pyruvate orthophosphate dikinase (PPDK), NADP-dependent malate dehydrogenase (NADP-MDH), could also be regulated by salinity/alkalinity poplar (Populus alba × P. berolinensis) trees, similarly already documented changes antioxidative superoxide dismutase (SOD), catalase (CAT), glutathione reductase (GR), pigment composition, photosynthesis, respiration. However, compared with 50–90% a young chlorenchyma, much smaller malondialdehyde (MDA), enzymatic were observed showing was organ-dependent. This suggests ratios between nonleaf (the commonly used parameter to discern operation photosynthetic pathway chlorenchyma), dependent SA stress. Moreover, enhancement these seen an improved contrary soil, when fresh mass (FM) unit calculation chlorophyll (Chl) unit. An identification photosynthesis via difference should take this environmental regulation unit-based into account.
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