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Explain how the presence of chloroplasts in guard cells affect the opening of stomata.

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  • Chloroplasts are sites of photosynthesis. During the day, photosynthesis takes place. Glucose is manufactured , and being osmotically active, it increases the internal concentration of guard cells, making them turgid and bulge outward, opening the stomata.
     
  • ( starch interconversion theory)- Chloroplasts are sites for photosynthesis. When photosynthesis takes place, Coconcentration goes up and the pH of the guard cells rise, favouring the conversion of starch to glucose then being osmotically active, it increases the internal concentration of guard cells, making them turgid and bulge outward, opening the stomata.
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