Madreporite or sieve plate is found in

Sieve cells are found in

Sieve tube is

Sieve tube is

Simple sieve plate occurs in

Simple sieve plate occurs in

Madreporite is associated with

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

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