Why do floating leaves of aquatic plants have stomata only on the upper side of the leaf
| April 11, 2021 | education
Why do floating leaves of aquatic plants have stomata only on the upper side of the leaf, while leaves immersed in water have no stomata at all?
The stomata are used for gas exchange with the surrounding air and moisture evaporation. In aquatic plants, the lower surface of floating leaves is immersed in water, in which gas exchange and evaporation cannot occur, therefore the stomata are located only on the upper side of the leaf. Leaves completely submerged in water have no contact with the air at all, so they have no stomata.
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