TREE PHYSIOLOGY
TRANSPIRATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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As humidity increases, the rate of transpiration decreases.
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As humidity increases, the rate of transpiration increases.
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As humidity increases, the rate of transpiration stays constant.
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None of the above
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Detailed explanation-1: -The transpiration rate is inversely proportional to the humidity in air. High humidity reduces the outward diffusion of water through the stomata. As a result, less water is lost, and lower transpiration rates are observed.
Detailed explanation-2: -As the relative humidity of the air surrounding the plant rises the transpiration rate decreases. It is easier for water to evaporate into dryer air than into more saturated air.
Detailed explanation-3: -When the relative humidity is high, the atmosphere contains more moisture. This lowers the driving force for transpiration. Lower relative humidity levels correspond to less moisture in the atmosphere and thus a higher driving factor for transpiration.
Detailed explanation-4: -When the moisture carrying capacity of the air increases, there is more space left for new water molecules to accommodate in the air. This increases the rate of transpiration through plants. Similarly, when the light intensity decreases, the rate of transpiration also decreases.
Detailed explanation-5: -The rate of transpiration decreases with the closure of stomata, high humidity, high atmospheric carbon dioxide level, the low water content of leaf, shedding of leaf.