Effect of Sugar Starvation on the Sugar Transport System in Suspension Cultures of Streptanthus trotus
2000
Cho Bong-Heuy The University of Suwon, Suwon (Korea Republic)
In suspension cultures of Streptanthus, the uptake rate of sugar was increased during the cell starvation of sugar in the medium. The maximal uptake rate obtained with 3 days of cell starvation. Sugar transport system induced by the sugar starvation was completely inhibited by 10 micro M cycloheximide. Plant cells are known to possess only one sugar transport system, but the uptake rate of glucose obtained a saturated kinetic while the one of sucrose had two different kinetics after the sugar starvation. Induced sugar transport systems had different kinetics compared to plant cell. These results showed that higher plants have adaptable ability to induce new sugar transport systems when the enviornment changed unsuitable.
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