HORTICULTURE SCIENCE
PLANT BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following explains why having sunken stomata reduces the rate of transpiration?
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less water molecules blown away gives a lower concentration gradient
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more water molecules blown away gives a lower concentration gradient
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less water molecules blown away gives a higher concentration gradient
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more water molecules blown away gives a higher concentration gradient
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Explanation:
Detailed explanation-1: -Because of the high humidity in the air pocket, the water potential gradient between the leaf air spaces and the exterior is reduced, and the rate of transpiration is reduced.
Detailed explanation-2: -They reduce the rate of water loss by transpiration.
Detailed explanation-3: -But when limited water is available in the soil, plants try to prevent water loss. Water loss through transpiration can be reduced by closing the stomata in the leaves using a substance called ABA.
Detailed explanation-4: -Transpiration is closely related to stomata. Nearly 97 % of water from plants is lost through stomatal transpiration, so the more stomata, the higher the transpiration rate [3].
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