The excess of water in plant is got rid of by means of
transpiration through the stomata on the leaves.
The excess water in plants is typically eliminated through a process called transpiration. Transpiration occurs primarily through small pores on the surface of leaves called stomata. Here's a step-by-step explanation of how plants get rid of excess water:
1. Water is absorbed by the roots of the plant from the soil through a process called osmosis.
2. The absorbed water is transported upward through the stem and into the leaves through a network of specialized tissue called xylem.
3. Once in the leaves, the water evaporates from the surfaces of the cells within the spongy mesophyll and palisade mesophyll layers.
4. The water vapor then diffuses through the air spaces within the leaf and exits the plant through the stomata.
5. Stomata are small openings located mainly on the underside of the leaves. They are surrounded by guard cells that control their opening and closing.
6. When the plant needs to conserve water, the guard cells close the stomata to reduce water loss. This mechanism helps control the rate of transpiration.
By transpiring excess water through the stomata, plants maintain their internal water balance and facilitate the transport of essential nutrients throughout their tissues.
The excess of water in plants is primarily eliminated through a process called transpiration. Transpiration is the loss of water vapor from plant leaves and stems to the atmosphere. It occurs due to the evaporation of water from specialized structures called stomata, which are small openings found on the surface of leaves.
To understand how excess water is eliminated through transpiration, let's go through the process step by step:
1. Water is absorbed by the plant's roots from the soil through structures called root hairs. This water is essential for various plant functions, such as nutrient uptake and photosynthesis.
2. Once inside the plant, water is transported upwards through specialized tissues called xylem. Xylem vessels act like tiny straws, conducting water and dissolved minerals from the roots to the rest of the plant.
3. As water moves upward through the plant, it reaches the leaves. The leaves contain numerous stomata, which are small pores primarily found on the undersides of leaves. Stomata play a crucial role in gas exchange by allowing carbon dioxide to enter the plant for photosynthesis and releasing oxygen produced during this process.
4. Along with carbon dioxide, water vapor also diffuses through the stomata into the surrounding air. This process is known as transpiration. When the water evaporates from the moist surfaces of the leaf, it pulls more water molecules up through the xylem from the roots, creating a continuous flow called the transpiration stream.
5. Transpiration helps plants maintain their water balance by regulating the amount of excess water leaving the plant. This is particularly crucial during times of plentiful water supply or after rainfall when the plant absorbs more water than it needs.
In summary, the excess water in plants is eliminated through transpiration, a process in which water vapor evaporates from the stomata on the leaves, pulling up more water from the roots through the xylem. This continuous flow of water helps maintain the plant's water balance and ensures proper functioning of various physiological processes.