Experiment 9 Effect of potassium ions on pore opening

。 Effect of Experiment 9 Potassium Ions on Pore OpeningPrincipleThe permeation system that defends cells can be regulated by potassium ions, whether ring or non-cyclic photolysis
phosphorylation
, which can form ATP. ATP continuously supplies the potassium-hydrogen ion exchange pump on the protosite membrane of the defense cell to work, supporting the defense cells against the difference in ion concentration to absorb potassium ions from the surrounding epithetral cells, reducing the penetration of the defense cells, so that the pores open.。 Instrument drugsmicroscopetweezer temperature box slide, cover slide
culture
dishes 0.5% potassium nitrate 0.5% sodium nitrate operating steps 1. With 0.5% KNO3 and 0.5% NaNO
3
solution.2. Put 0.5% KNO
3
, 0.5% NaNO
3
and 15 ml of distilled water in 3 Petri dishes.3. Tear the bean leaf skin several into the above 3 petri dishes.4. The petri dish is placed in a temperature tank at 25 degrees C, so that the solution temperature reaches 25 degrees C.5. Place the Petri dish in artificial light for half an hour.6. Observe the opening of the pores under a microscope.。