Effects of Lead Stress on Potassium Uptake by Roots of Different Maize Varieties
In order to elucidate the mechanism of potassium uptake in plant roots under lead stress and the model of lead phytoremediation.In this study,the effects of different concentrations of Pb2+on the total K+uptake rate and the K+uptake rate mediated by NSCCs(Non-selective cation channels)in roots of four maize varieties were investigated,and the trend of Pb uptake in four maize varieties was also discussed.The results showed that Pb2+could affect the potassium absorption of NSCCs,but the sensitivity of different varieties of maize root NSCCs to lead was different.With the increase of Pb2+concentration,the difference of total potassium absorption and potassium absorption of NSCCs between varieties tended to zero.'Jinyu818'has the most significant increase in lead absorption,and can be used as a potential alternative variety for lead pollution control.This study supplemented the data of ion absorption by maize roots through NSCCs,and provided a research basis for further understanding the absorption mechanism of lead and potassium ions.
Lead stressNon selective cation channelPotassium absorption
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