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Transpiration rates decrease proportionally to the amount of humidity in the air. This is because water diffuses from areas of higher concentration to areas of lower concentration. Thus, when the air spaces between the mesophyll cells in a leaf are saturated with water vapor, and the air outside the leaf is likewise saturated, there is a shallow gradient. A shallow gradient results in a slower transpiration rate. Conversely, if the air outside the leaf is relatively dry, the gradient becomes steep and the rate of transpiration increases.
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MaxineHumidity affects the rate of transpiration by creating a gradient that impacts the movement of water vapor from the plant to the atmosphere. Higher humidity levels outside the plant reduce the gradient, slowing down transpiration. Conversely, lower humidity levels increase the gradient, leading to a faster rate of transpiration.
As temperature increases, the rate* of evaporation also increases as water molecules move more rapidly at higher temperatures than at low tempratures and also because warm air can hold more water vapour than the cold air. So, on a warm day, the rate of transpiration is hence more than on a cold day.
* It should be noted that the term rate is used to imply: with respect to time.
As the temperature increases, the rate of transpiration increases. This is because if it is warm the plant cells that control the stoma (openings on underside of leaf), make them open wider to allow more water to evaporate. If it is cold, the stoma will remain closed or they will only open a very small way meaning that little water can evaporate.
Edited answer:
The opening and closing of stomata is regulated by sun shine. Temperature inhances the rate of water evaporation from leaves through stomata. Hence increase in transpiration is recorded with increse in temperature.
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Which factor affects most in transpiration-humidity or light intensity?
Light intensity
What is the rate of transpiration effected by?
The rate of traspiration is effected by light intensity, humidity and wind velocity etc.
What environmental factor has the greatest effect on transpiration?
The environmental factor that has the greatest effect on transpiration is humidity. High humidity levels reduce the rate of transpiration because there is already a lot of moisture in the air, making it harder for water to evaporate from the plant's leaves. Conversely, low humidity levels increase transpiration as the drier air creates a larger gradient for water to move out of the plant.
When transpiration would be minimum?
Transpiration would be minimum when the environmental conditions are cool, humid, and still. This is because high humidity reduces the rate of water loss from the plant leaves, while cool temperatures slow down the metabolic processes that drive transpiration. Calm conditions also prevent the movement of air that can increase evaporation from the leaves.
List environmental factors that effect the rate at which plants transpire?
Environmental factors that affect the rate at which plants transpire include temperature, humidity, wind speed, and light intensity. Higher temperatures generally increase transpiration rates, while higher humidity levels can decrease transpiration. Wind can increase transpiration by removing water-saturated air around the leaf surface, and light intensity can also influence the opening and closing of stomata, affecting transpiration rates.
