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1. It is the opening present for loss of water in the gaseous form.
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1. It is the opening present for loss of water in the liquid form.
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2. The opening is guarded by the guard cells which are kidney shaped.
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2. No such cells are present for guarding the opening
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3. The stomata leads to a cavity into the interior of the epidermis called as the respiratory chamber or substomatal chamber.
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3. The hydathode is followed by a large intercellular space or air chamber. The loosely arranged cells beneath the air chamber at the end of the xylem element are known as epithem.
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4. Stomatal transpiration is controlled by the opening and closing of the stomata.
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4. Guttation takes place due to the root pressure.
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5. Transpiration occurs in the day time during the time when the stomata is opened
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5. Guttation occurs at the night and also at low transpiration.
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6. Usually the stomata remain open during the day time and closed during the night time.
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6. The hydathode remains open during the day as well as the night time.
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7. Stomata is more common on the abaxial surface than adaxial surface.
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7. The hydathodes are seen at the tips of the veins of the leaves.
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