Meisterprüfung Gärtner Practice Questions - Österreichische Meisterprüfung Für Das Reglementierte Handwerk Der Gärtner (Master Craftsman In Horticulture & Gardening) Exam

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What biophysical and ion-transport mechanism drives the opening of stomatal guard cells (Schließzellen) in response to light in greenhouse crops?

Passive efflux of potassium (K+) ions into surrounding epidermal cells causing cell wall shrinking Synthesis of abscisic acid (ABA) within the chloroplast stroma leading to immediate vacuolar water uptake Calcium (Ca2+) influx into the cytoplasm triggering rapid cell wall rigidification and water loss Active proton (H+) extrusion by plasma membrane H+-ATPases driving potassium (K+) and chloride/malate influx, increasing turgor

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Active proton (H+) extrusion by plasma membrane H+-ATPases driving potassium (K+) and chloride/malate influx, increasing turgor

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