PLANT PHYSIOLOGY
TRANSPORT IN PLANT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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I only
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II only
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I and II only
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II and III only
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Detailed explanation-1: -Wind & air movement: Increased movement of the air around a plant will result in a higher transpiration rate. Wind will move the air around, with the result that the more saturated air close to the leaf is replaced by drier air.
Detailed explanation-2: -The transpiration rate is directly proportional to the absorption of water by the roots from the soil. A decrease in water absorption causes the closure of stomata and wilting, thereby reducing the rate of transpiration.
Detailed explanation-3: -Transpiration rate increases with the velocity of wind and intensity of light. As the humidity of the outside atmosphere is increased, transpiration decreases.
Detailed explanation-4: -Water is able to diffuse through the leaf due to the many interconnecting air spaces. This increases the diffusion of the water out of the plant’s leaves. Mesophyll cells in the leaves have a large surface area. This also means water vapour can diffuse out of the plant quite quickly thus, increasing water loss.