regulation of stomatal opening for letting CO2 in..Plz explain this in simple way?
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There are two theories to this question..
1.old sugar concentration theory
During day time when sugar is produced, the sugar increases the osmotic pressure inside the leaf cell and the guard cells bulge out due to turgid conditions and hence the stomata opens for co2 to enter..
2.new k+ concentration theory..
During daytime when chloroplast in guard cells photosynthesise, ATP is produced which is a form of energy.. This energy is used to actively pump k+ ions into the guard cells which make the solution inside the cell hypertonic and water moves in from adjacent cells.. Hence the cells bulge out once again and the stomata opens for letting in co2..
Hope this helps..
1.old sugar concentration theory
During day time when sugar is produced, the sugar increases the osmotic pressure inside the leaf cell and the guard cells bulge out due to turgid conditions and hence the stomata opens for co2 to enter..
2.new k+ concentration theory..
During daytime when chloroplast in guard cells photosynthesise, ATP is produced which is a form of energy.. This energy is used to actively pump k+ ions into the guard cells which make the solution inside the cell hypertonic and water moves in from adjacent cells.. Hence the cells bulge out once again and the stomata opens for letting in co2..
Hope this helps..
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