Claim · model-written summary
Cell membranes of maize roots have rather similar diffusivities for potassium and sodium.
Zea maysVerbatim
e6“the cell membranes have rather similar diffusivities for these two cations”
e7“The release of potassium and sodium from excised roots of Zea mays”
Title
Konrad Mengel; Reinhard Pflüger PLANT PHYSIOLOGY 1972. doi:10.1104/pp.49.1.16
Other claims from this paper (10)
- Observation At 2 C the potassium and sodium efflux rates from excised maize roots were very similar.
- Intervention effect At 20 C the potassium release from excised maize roots was reduced considerably compared with 2 C.
- Intervention effect At 20 C the sodium release from excised maize roots was hardly affected compared with 2 C.
- Intervention effect Under anaerobic conditions the potassium efflux rate from maize roots was nearly as high as the sodium efflux rate.
- Intervention effect With normal O2 supply the potassium release from maize roots was reduced to about one-fifth.
- Intervention effect A changing efflux medium had no great influence on sodium release from maize roots, compared with a constant medium.
- Intervention effect A changing efflux medium influenced potassium release from maize roots very much, compared with a constant medium.
- Mechanism The low potassium release under normal metabolic conditions is assumed to be due to reabsorption of effluxed potassium from free space.
- Mechanism Reabsorption of sodium is of minor significance for maize roots, because their sodium uptake potential is very poor.
- Mechanism Potassium and sodium release from maize roots is a diffusion process.
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Hemerocallis hybrid cultivar