PLANT PHYSIOLOGY
TRANSPORT IN PLANT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Diffusion can account for the observed rates of transport.
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Movement can occur both upward and downward in the plant.
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Sugar is translocated from sinks to sources.
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Sugar transport does not require energy.
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Detailed explanation-1: -Which of the following is a correct statement about sugar movement in phloem? Sugar transport does not require energy. Sugar is translocated from sinks to sources.
Detailed explanation-2: -Detailed Solution. The correct answer is Phloem transports photosynthetic products. Phloem is a living tissue in vascular plants that conducts the soluble organic compounds synthesized downwards from the leaves during photosynthesis.
Detailed explanation-3: -The photosynthates from the source are usually translocated to the nearest sink through the phloem sieve tube elements. For example, the highest leaves will send sugars upward to the growing shoot tip, whereas lower leaves will direct sugars downward to the roots.
Detailed explanation-4: -The food materials synthesized in the leaves move downwards to the stems and roots. The upward and downward translocation takes place through the phloem. The upward movement of food materials occurs from the leaves to the buds, growing leaves, flowers, fruits and seeds.