The Effect of Cycloheximide on Absorption of Ions by Bean (Phaseolus vulgaris L) Roots
- 1 January 1976
- journal article
- research article
- Published by Oxford University Press (OUP) in Annals of Botany
- Vol. 40 (1) , 43-48
- https://doi.org/10.1093/oxfordjournals.aob.a085113
Abstract
10−7 M cycloheximide inhibited bean (Phaseolus vulgaris) root elongation by about 20 per cent but it inhibited absorption of rubidium, sodium, and phosphate ions to a much greater extent (34–71 per cent). Tips of intact plant roots grown in the inhibitor showed more inhibition in ion uptake than adjacent proximal portions of the same roots and this is taken to indicate that 10−7 M cycloheximide does not exert its effect on ion uptake by any uncoupling action. Sodium uptake from 0.5 or 10 mM NaCl solutions by root tips was inhibited by 10−7 M cycloheximide to twice the extent that it was in the elongating region of the root. Assuming that the inhibitor affects the plasmalemma more than the tonoplast, Epstein's model of parallel operation of system 1 and system 2 at the plasmalemma is supported.This publication has 1 reference indexed in Scilit:
- Active sodium and potassium transport in cells of barley roots.Proceedings of the National Academy of Sciences, 1967