PLANT PHYSIOLOGY
TRANSPORT IN PLANT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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High levels of water in the plant
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Low levels of water in the plant
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Either A or B
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None of the above
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Detailed explanation-1: -Stomata are mouth-like cellular complexes at the epidermis that regulate gas transfer between plants and atmosphere. In leaves, they typically open during the day to favor CO2 diffusion when light is available for photosynthesis, and close at night to limit transpiration and save water.
Detailed explanation-2: -In angiosperms, passive inflation of epidermal cells at high water potential pushes back on guard cells, causing stomata to close rather than open.
Detailed explanation-3: -When the turgidity increases within the two guard cell, the thin outer walls bulge out and stomata opens. the microfibrils in guard cells are made up of cellulose oriented radially rather than longitudinally making it easier for the stomata to open.