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Importance of Water to Plants

By Denise Bertacchi ; Updated September 21, 2017
Water on a flower.

Every living thing requires water. Plants can use up to its entire body weight in water. If humans were to use the same amount of water, we would need to drink up to 20 gallons of fluid a day.

Function

Droplets on a plant.

Plants use water to dissolve minerals and nutrients from the soil surrounding the root system and carry it up through the stems and leaves.

Transpiration

Plants need water or will wilt.

Water is essential for transpiration, the exchange of water for carbon dioxide. Pores in the leaves of plants absorb carbon dioxide and allow water to evaporate out.

Structure

In need of energy.

Water fills the cells of plants providing firm support. This is why plants wilt when deprived of water and perk up after receiving water.

Photosynthesis

Delicate leaves.

Water is an important part of photosynthesis, the process plants use to convert the sun's energy into food. Water molecules combine with carbon to produce glucose, which the plant uses as food.

Expert Insight

Roots need attention, too.

Too much water can cause a plant's roots to rot. Gardeners should take care that plants have enough drainage to avoid overwatering.