Sucrose uptake by cotyledons of Ricinus communis L.: Characteristics, mechanism, and regulation

@article{Komor1977SucroseUB,
  title={Sucrose uptake by cotyledons of Ricinus communis L.: Characteristics, mechanism, and regulation},
  author={Ewald Komor},
  journal={Planta},
  year={1977},
  volume={137},
  pages={119-131}
}
Cotyledons of Ricinus communis take up externally supplied sucrose at a rate of up to 150 μmol/h/g fresh weight, which is very high when compared with other sugar transport systems of higher plants. The uptake of sucrose is catalysed with a K m of 25 mmol l−1; at high sucrose concentrations a linear (diffusion) component becomes obvious. Other mono-, di-, or trisaccharides do not compete for sucrose uptake. Sucrose is accumulated by the cotyledons up to 100-fold, whereby most of the transported… CONTINUE READING