Long Distance Transport of Potassium in Intact Peanut Seedlings: Effects of Sodium and Ouabain

Abstract

Of the potassium originally present in peanut seeds, 66.3 % was transported to the shoot and 15.8 % to the root of the growing seedling after 8 days of growth, while the remaining 18 % could still be located in the cotyledons. At an external potassium level of 6 mM, long distance transport of potassium to the shoot by the intact peanut seedling was not affected by the sodium present in the culture solution. Ouabain at levels ranging from 0 to 30 mM also had no effect.