Osmotic: Relating to water movement across a semi-permeable membrane, such as a plant cell wall.
Osmosis is a process in which water moves from an area with a higher concentration of water molecules to an area with a lower concentration across a membrane that lets water through but not other substances. Think of it as water finding its own level, trying to balance things out. In plants, this happens through cell walls, which act as semi-permeable membranes.
Osmosis is how plants take up water from the soil. The roots have a higher concentration of dissolved substances (like sugars and minerals) than the surrounding soil, so water moves into the roots to try to balance things out. This is why it’s important to water your plants properly so the soil has enough moisture for the roots to absorb. Osmosis also plays a role in how plants maintain their shape and structure. The pressure created by water moving into cells helps keep them firm and upright.
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