PLANT PHYSIOLOGY
TRANSPORT IN PLANT
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Outside the plasma membrane
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In the entire cytosol
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On both sides of plasma membrane
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In the plasticity content
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Detailed explanation-1: -The apoplast is the space outside the plasma membrane consisting of intercellular spaces where the material diffuses freely. It does not involve protoplasm in the plant tissues but involves the non-living parts of the plant such as cell wall and intercellular spaces.
Detailed explanation-2: -Apoplast is the space outside the plasma membrane that allows free movement of material. This route plays a crucial role, and allows diffusion of a solvent across the tissue or organ. The response to different environmental and biotic stimuli in apoplast can be an oxidative or respiratory burst (Fig.
Detailed explanation-3: -Apoplast is the system of cell walls which is continuous throughout the plant except in some parts like Casparian strips in the roots. Therefore it cannot be aided by cytoplasmic streaming and cannot occur through plasmodesmata. So, the correct answer is ‘apoplast pathway is faster than the symplast pathway’
Detailed explanation-4: -The apoplast is the route the water moves through the cell walls and intercellular space of the root cortex. In the symplastic route, the water moves through the protoplasts of the root cortex. The apoplast route is the fully permeable route in which the water movement occurs in passive diffusion.
Detailed explanation-5: -apoplast does not provide any barrier to water movement and water movement is through mass flow.