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《Journal of Nuclear Agricultural Sciences》 2008-03
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EFFECTS OF Cu~(2+) CONCENTRATION ON CUCUMBER SEED AND PHYSIOLOGICAL CHARACTERISTICS OF SEEDLING

SUN Yong-Dong LI Zhen-xia LI Xin-Zheng LUO Wei-Rong(College of Landscape,Henan Institute of Science and Technology,Xinxiang,Henan 453003)  
Effects of different concentration Cu~(2+) on development and physiological characteristics of cucumber during seed germination were studied.The results showed that lower Cu~(2+) concentration(25mg/L) could promote the seed germination and seedling growth of cucumber,under this concentration,seed germination rate,germinating energy,germination index,vigor index,length of root,length of hypocotyls,diameter of hypocotyls and relative water content of seedlings were higher than those of control,and under other Cu~(2+) concentrations.However the plasma membrane relative permeability,MDA content,soluble sugar content,proline content,SOD and POD activities of cucumber seedling at 25mg/L Cu~(2+) were the lowest among those of all treating concentrations.But with the increasing of Cu~(2+) concentration(50~300mg/L),the physiological indicators of seed germination decreased,while physiological index of seedling had an rising tendency,which indicated that higher Cu~(2+) concentration significantly inhibited the seed germination and seedling growth,especially at 300 mg/L Cu~(2+) concentration.The results provided the reliable basis for studying the relationship between growth of crops and heavy metal Cu.
【Fund】: 河南省重点科技攻关项目(072102120006);; 河南科技学院博士科研启动项目资助(6011)
【CateGory Index】: S642.2
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