In old sieve tubes at the end of the growing | vedclass

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(B) During the end of the growing season,the sieve pores in old sieve tubes become blocked by the deposition of a polysaccharide called $Callose$.This

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Callose

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(B) During the end of the growing season,the sieve pores in old sieve tubes become blocked by the deposition of a polysaccharide called $Callose$.This deposition of $Callose$ forms a $Callose$ pad or plug over the sieve plate,which effectively reduces or stops the transport of sugars and other organic solutes through the sieve tubes.

In old sieve tubes at the end of the growing season,which of the following gets deposited over the sieve plate to regulate sugar transport?

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