Sieve Elements (Sieve Cells and Sieve Tubes)

Sieve tube is

Differentiate between Sieve cells and sieve tubes

Differentiate between the following: Sieve cells and Sieve tubes

Sieve cells occur in

Sieve tubes and companion cells are sister cells and (a) Companion cells maintain the osmotic balance in sieve elements (b)Both cells are derived from same mother cells (c )Sieves are associated with companion cells in all seed bearing plants (d) Companion cells present in Pinus only

Assertion :- Sieve tube element and companion cell are called sister cells. Reason :- Sieve tube element and companion cells arise from same mother cells.

Companion cells are closely associated with 1 Vessel elements 2 Trichomes 3 Guard cells 4 Sieve elements

Spermatophytes in which phloem have albuminous cells and sieve cells

Mature sieve tube has