Title: Effects of Different Salt Treatments on the Root Proton Extrusion and Membrane Permeability of Zea mays Seedlings
Abstract:The effects of different salt stress on the root proton extrusion and membrane permeability of Zea mays(cv.Zhengdan No.958) seedlings treated with 100 mmol/L NaCl,100 mmol/L KCl and 50 mmol/L Na2CO3 f...The effects of different salt stress on the root proton extrusion and membrane permeability of Zea mays(cv.Zhengdan No.958) seedlings treated with 100 mmol/L NaCl,100 mmol/L KCl and 50 mmol/L Na2CO3 for 3 d were examined.The results indicated that different salt treatments significantly inhibited Zea mays roots growth,and the inhibitory degree was Na2CO3KClNaCl.The treatments of NaCl and Na2CO3 markedly reduced root K+ content and increased Na+ content,leading to a significant increase of the ratio of Na+/K+.However,KCl treatment just resulted in an opposite trend.Different salt treatments significantly enhanced the plasma membrane permeability and inhibited the proton extrusion ability of the Z.mays roots,and the influence degree was Na2CO3KClNaCl.These results suggest that:under the same cation concentration condition,the inhibitory effect of KCl on the roots proton extrusion was much more than that of NaCl treatment,and alkaline salt more than neutral salt.Salt tress possibly regulates the proton extrusion of Z.mays roots by altering the stability of plasma membrane,leading to the growth inhibition of the roots.Read More
Publication Year: 2007
Publication Date: 2007-01-01
Language: en
Type: article
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