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How does the process of photosynthesis cause the stomata to open?

• what factors and things like that of photosynthesis cause the stomata to open.

• Answer:

  When stomata are open the guard cells are turgid, when they're closed the guard cells are flaccid. The number of ions in guard cells is partly responsible for the movement of water into guard cells. Ions, particularly potassium ions, migrate into guard cells from adjacent cells as carbon dioxide concentration declins when photosynthesis commences as light becomes available. As the concentration of ions rises, greater water absorpton by the guard cells occurs & stomata open. When potassium ions move out of guard cells, water also moves out. This may occur at the end of the day. Reduced light means less photosynthesis. Carbon dioxide accumulates making the cell more acidic. Potassium ions move out of the guard cells and this leads to water also leaving the guard cells. The guard cells become flaccid and stomatal pores close. I hope that's not too complicated.