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Duan Changqun Wang Huanxiao(Biology Department & Evolutionary Ecology Laborotary,Yunnan University,Kunming,650091,China)  
The activity of Lactate dehyderogenase(LDH) in broadbean was enhanced under the treatment by Pb+2,Cd+2,Hg+2 at the concentration of 5.00mg/kg 2.00mg/kg and 0.50 mg/kg respectively ver the concentrations stated above,it went down.using electrophoresis,5 LDH isozymes were presented differentially under treatment by different metal ions at different dosages.Among them,LDH2 was induced by lower concentration of metal ions.LDH4 was sensitive to metal ions and dispeared when treated with enhanced concentrations.LDH3 AND LDH5 were tolerant to metal ions.the effect of the differential expression of LDH isozymes on the total activities of LDH and their impact on physiological ecological precesses in plants were discussed.Adaptation cost was put forward as a concept.
【Fund】: 国家自然科学基金 云南省应用基础研究基金
【CateGory Index】: S143.7
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