Deposition of callose is found in

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(D) The correct answer is $D$. Sieve tubes are specialized cells in the phloem tissue responsible for the translocation of food. During the winter sea

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Sieve tubes

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(D) The correct answer is $D$. Sieve tubes are specialized cells in the phloem tissue responsible for the translocation of food. During the winter season or when the plant is injured,the sieve pores become plugged with a carbohydrate polymer known as callose. This deposition of callose reduces or blocks the transport of food materials through the sieve tubes.

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