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Effect of light on plant guard cells?

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how do light cause H+ to exit plant cells and open the stomata?

is there a special protain, which?

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  1. reversal absorption of water due to varied solute concentrations-----ultimately result in opening & closing of stomata.


  2. opening and closing of stomata.Formation of malic acid.Dissociation into malate & H+ions.H+ ions are exchanged for K+ IONS.Influx of potassium ions and aflux of h ions.Endosmosis and turgor pressure.
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