PLANT PHYSIOLOGY
TRANSPORT IN PLANT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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To reduce resistance to the flow of substances in the phloem.
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To reduce energy required for transport of mineral salts.
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To increase the production of amino acids.
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None of the above
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Detailed explanation-1: -The sieve tube cells contain no organelles and very little cytoplasm to create more space for solutes to be transported.
Detailed explanation-2: -(d)Absence of nucleus at maturity. (e)Tube-like structures present in longitudinal series. Hint: Found in the phloem, sieve tube elements are very specialized cells due to their modified and metabolically restricted protoplasm.
Detailed explanation-3: -Sieve tubes are a component of the phloem in plants. They function as the vessle that transports organic food and other material across the plant.
Detailed explanation-4: -Pores on sieve areas allow for cytoplasmic connections to neighboring cells, which allows for the movement of photosynthetic material and other organic molecules necessary for tissue function. Structurally, they are elongated and parallel to the organ or tissue that they are located in.