Which of the following will affect the active uptake of
water?
(a) Transpirational power of the root hairs.
(b) Typical tissue organization.
(C) Tension due to transpiration.
(d) Osmotic concentration of the cell sap of the leaves
Answers
Explanation:
According to the transpiration pull theory, water is absorbed by plants with the help of transpiration pull. Transpiration pull generates a tension in continuous water column in the xylem elements, which lifts up the water and is also responsible for absorption of water.
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Answer:
Option C is correct.
Explanation:
Plant cells require high "turgor" to maintain rigidity (or keep leaves open and open to block the maximum amount of light and gases) - called a hypotonic state. The opposite is hypertonic, when the turgor pressure in the plant cell is low, water escapes from the cell, the walls contract, and the leaves wilt. Plants do this when they are very dry, but when the exchange of intracellular and extracellular water changes, the stomata (stoma) in plant leaves open and close and the release of water vapor and gases ( and as a result, they control the rate of photosynthesis). do.
1. Leaf surface - the main factor of water pumping is leaf transpiration. Of course, this is necessary for photosynthesis. Leaves absorb water through capillary action and overcome gravity.
2. Temperature - Depending on the type of plant, stomata open or close to promote or delay transpiration. Therefore, on cool to moderately hot days, the stomata are wide open, transpiration is maximized, and water needs are high. In most plants the stomata do not close completely.
3. The wind. Leaf surface (again, most plant species, especially deciduous plants (such as grapes), have a "layer" of water vapor on the surface that facilitates vapor exchange with the atmosphere (leaf photosynthesis). Again, temperature We consider it as the wind speed.
4. Humidity - Humidity affects the rate of transpiration depending on the species, so low humidity on very hot days also closes the stomata to maintain turgor pressure. ….. a windy and hot day.
What is transpiration ? Discuss the role
the that transpiration plays in a plant &
the factour that affect the rate of
transpiration?
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What is meant by ascent of sap?How does transpiration help in the ascent of sap?
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