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At maturity the sieve plates become impr...

At maturity the sieve plates become impregnated with

A

cellulose

B

pectin

C

suberin

D

callose

Text Solution

Verified by Experts

The correct Answer is:
D
Sieve plates are formed by two adjoining end walls of neighbouring sieve elements of sieve tube of phloem. At maturity, these become impregnated with callose pad, which may be seasonal callose (for only limited unfavourable period) or definitive callose (formed permanently in functionless old sieve tubes).
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