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Study of the Plant's Absorbing and Distributing Characteristic to Pb on Nelumbo mucifera

LIU Yi-ping,WANG Hai-bo,KONG De-zheng*(Henan Agricultural University,Zhengzhou 450002,China)  
A cultivar of Lotus(Nelumbo mucifera),Jiandehonglian,was under different concentrations of Pb(NO3)2 solutions to study the discipline of the uptake to Pb and its distribution in the plant.Pb in the plant distributed as follows:fibrous rootpetiolebudleaveslotus root,especially,Pb in the fibrous root was much higher than that in other organs.Under normal conditions,when Pb(NO3)2 concentration was lower than 100mg/L,the higher the Pb(NO3)2 concentration,the higher content the plant;and its inhibition to Jiandehonglian lotus strengthened.While the Pb(NO3)2 concentration was above 100mg/L,Pb content increased with the increase of Pb(NO3)2 concentration;after being up to the peak,decreased,furthermore,prompted the growth of Jiandehonglian lotus
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