OBJECTIVE LIFE SCIENCE
PLANT PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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WHICH OF THE FOLLOWING FACILITATES OPENING OF STOMATAL APERTURE?
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DECREASE IS TURGIDITY OF GUARD CELL
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RADIAL ORIENTATION OF CELLULOSE CELL WALL OF GUARD CELL
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CONTRACTION OF OUTER WALL OF GUARD CELL
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None of the above
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Explanation:
Detailed explanation-1: -The guard cells’ cell walls’ microfibrils work together to control the opening of the stomata. The orientation of cellulose microfibrils takes place radially rather than longitudinally, which makes it easier for the stomata to open.
Detailed explanation-2: -Stomata are pores found in the epidermis of most aerial parts of plants and are formed between a specialized pair of cells, the guard cells. Stomata facilitate the uptake of CO2 at the expense of water vapor release via transpiration (Hetherington and Woodward, 2003).
Detailed explanation-3: -Cellulose microfibrils are oriented radially rather than longitudinally making it easier for the stomata to open.
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