Abstract
AbstractUptake and fluxes of sodium, rubidium (instead of potassium), and chloride ions in segments of 3‐week‐old sugar beet roots were studied. Radioactive 22Na, 86Rb and 36Cl were used for labelling of the ions. Compartmental analysis was used to obtain the fluxes and concentrations in the cell compartments. The passive or active character of the movements was examined by the Ussing‐Teorell equation and compared with electropotential measurements.In the case of sodium, net flux was in the outward direction over both tonoplast and plasmalemma, but the active components were directed away from the cytoplasm. Potassium was close to equilibrium. Chloride was actively transported from the medium to the cytoplasm, and — contrary to observations in other systems — from the vacuole to the cytoplasm. This unusual situation may be caused by a loss of sugar, both by lowering the energy supply and by formation of organic acids.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
