Explain the role of water potential in the movement of water from soil

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02-03-2017
Biology

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Explain the role of water potential in the movement of water from soil

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XXLANAA XXLANAA · Answer 1 · 2017-03-02T17:31:13+01:00

It's been a while, but I think I can answer this. Concentration gradients tend to shift from high concentration to lower concentrations for equilibrium. So if the water potential is more in the soil and plant, but less in the air, water will want to travel from the soil, through the plant into the air.

Water evaporates into the atmosphere through the means of transpiration. As the water evaporates, it tends to pull more water molecules up along the xylem. This is known as transpiration pull, where because of surface tension of water and capillary action, water is pulled up along the xylem due to transpiration. This is not the only mechanism of water movement in plants however.

Anyways, from the example of transpiration pull, you can see the role of water potential as the water potential in the soil, being high, flows through the plant, and into the air.

Oseni Oseni · Answer 2 · 2022-04-20T12:39:31+02:00

Water potential aids the movement of water from the soil because water moves from the region of higher potentials to the region of lower potentials.

Water Potentials

This refers to the inherent potential energy of water relative to that of pure water.

Pure water has a water potential of zero, whereas, waters with dissolved solutes have lower water potential as compared to pure water.

Water generally moves from the region of high water potential to the region of low water potential. This dictates the movement of water in the soil.

More on water potential can be found here: https://brainly.com/question/23855783