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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