Stomatal opening is stimulated by low internal CO2 and blue light, which causes K+ ions to be actively transported into guard cells, leading to water influx and opening.
Öffnung der Spaltöffnungen modernes Konzept: Stimuli: niedriger CO²-Gehalt im Innenraum. Einwirkung von Blauem Licht, das H+-Ionen aus der Apfelsäure produziert, die herausgepumpt werden. --- Effekt: *Aktiver Transport* von K+-Ionen in die Zelle unter Verwendung von ATP. K+-Ionen verbinden sich mit Malat und lösen sich in Wasser auf. --- Umkehrung: K+ wird durch aktiven Transport herausgepumpt.
| Front | Opening of stomata modern concept |
|---|---|
| Back | Stimuli: • Low level of CO² inside life spaces • Exposure to blue light, which produces H+ ions from Malic acid that are pumped out. Effect: • *Active transport* of K+ ions into the cell using ATP. • K+ ions combine with malate and dissolve in water. Reversal: K+ is pumped out by active transport |
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