What does callose block?

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(D) Callose is a polysaccharide that is deposited in the sieve plates of sieve tube elements. During the dormant season,such as winter or autumn,the p

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Sieve tubes in winter/autumn

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(D) Callose is a polysaccharide that is deposited in the sieve plates of sieve tube elements. During the dormant season,such as winter or autumn,the plant deposits callose to block the sieve pores,effectively sealing off the sieve tubes to prevent the loss of nutrients and to protect the plant during unfavorable conditions. This process is known as the formation of a 'callose plug'.

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