Question

plant bodies can respond to changes in their environmental conditions. How does a plant regulate water in its body?

Answer 1

Stomatal pores in plants regulate the amount of water and solutes within them by opening and closing their guard cells using osmotic pressure. ... Third, it allows for oxygen to be expelled into the outside environment, a byproduct of photosynthesis that is no longer needed by the cell.

Answer 2

Stomata, located on the leaves' surfaces, are involved in regulating gas interchange and water release. Plants regulate water by opening and closing stomata.

What are the stomata?

Stomata are small pores placed in the leafs' surfaces, whose opening is regulated by two guard cells surrounding them.

These pores are involved in gas interchange -letting CO₂ get into the plant, and O₂ leave it- and the transpiration process -expelling water through transpiration-.

Guard cells can expand or contract according to the plants' needs, causing the stomata to open or close.

Stomata opening and closure depend on water and CO₂ concentration inside the plant.

·        If the plant is dehydrated, stomata close. If it is not dehydrated, it opens.

·        If CO₂ levels are too low, stomata open to gain it.

So, stomata affect photosynthesis by controlling gas interchange -CO₂ and O₂- and water release -transpiration-.

Water balance:

·        Stomata also regulate water vapor flow through transpiration.

·        By limiting its exit, stomata allow more water molecules to be available for light reaction processes when the plant is dehydrated.

According to this information, plants regulate water in their bodies by opening and closing stomata.

You can learn more about stomata and water regulation at

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