FORESTRY
PLANT AND WOOD ANATOMY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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ABAXIAL SURFACE
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ADAXIAL SURFACE
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BOTH SURFACES
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NEITHER OF THESE
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Detailed explanation-1: -The upper surface of the leaf is more exposed to sunlight, thus the rate of transpiration is high. In order to reduce the loss of water due to transpiration the dorsiventral leaf has more stomata in the lower surface than the upper surface.
Detailed explanation-2: -In dorsiventral leaves, epidermis is present on the outer side of both upper (adaxial) and lower (abaxial) surfaces with cuticle deposition and stomata. Stomata are usually present only on the lower surface.
Detailed explanation-3: -Lower surfaces are not directly exposed to sun. This tends to reduce excessive water loss. It is a beneficial adaptation to check water loss in plants. Thus, the underside of leaves have more stomata.
Detailed explanation-4: -The leaf dorsiventral polarity In mature leaves, the side towards the sun is the adaxial side and the other side is the abaxial side. The adaxial sides are greener and have more cuticle than the abaxial sides. The position and structures of the two sides also reflect different functions of the two domains.