how is water transported upwards in plants give the answer in brief
Answers
It is through them that the water evaporates into the air. This reduces the pressure at the top of xylem vessels and thus water flows up into them. The food which is prepared by the process of photosynthesis in the leaves of a plant has to be transported to other parts like stem, roots, branches etc.
the leaves of a plant? How does water get all the way up to the top of a tall tree? In this month’s Home Connections activity, you will learn about the movement of water through a plant.
Water is very important to plants. Plants need water to produce food and grow. Plants make their own food through a complex, sunlight-powered process called photosynthesis. Simply put, in photosynthesis, water absorbed by a plant’s roots and carbon dioxide taken from the air by a plant’s leaves combine to make the plant’s food.
Water helps transport nutrients throughout all parts of the plant. Water also helps support the plant by filling up the cells that make up the plant so it can stand up straight.
A Long Road to Travel
Water is absorbed from the soil into the roots of a plant. However, to reach the leaves where photosynthesis takes place, water must move upward to the top of the plant.
Water travels through long, thin tubes running up from the roots through the stems and leaves called xylem.
Water Attracts
Water moves up the xylem through a process called capillary action. Capillary action allows water to be pulled through the thin tubes because the molecules of the water are attracted to the molecules that make up the tube. The water molecules at the top are pulled up the tube and the water molecules below them are pulled along because of their attraction to the water molecules above them.
A sponge also absorbs water through capillary action. The sponge is filled with thin spaces that act like thin tubes.
What Transpires
When plants have more water in their leaves than they need, they get rid of this extra water through a process called transpiration. During transpiration, water evaporates from holes in the surfaces of leaves into the air. As water molecules evaporate from plant leaves, they attract the water molecules still in the plant, helping to pull water up through the stems from the roots. The combination of transpiration and capillary action delivers the water from the bottom to the top of a plant.
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