Question

write a short note on phloem and its funtion​

Answer 1

Answer:

phloem runs alongside the xylem tissue. It contains of sieve cells which from long narrow tubes with perforated sieve plates along the thin length. The function of these tissues is to transport food nutrients such as sucrose and amino acid from the leaves to all other cells of the plant. This is called translocation.

Answer 2

PHLOEM

Phloem is type of complex permanent tissue which conducts food materials from the leaves to other parts of the plant. This a type of permanent tissue which do not provide any mechanical strength to plant.

Below are some types of phloem :-

Sieve tubes :-  Sieve tubes are conducting elements which are elongated and are of tube-like structures. The sieve tube cells consist no nucleus and have a large vacuole.

Companion cells :-  Companion cells are parenchymatous cells which are closely associated with the sieve tube. As these cells have nucleus so it controls metabolic activities of sieve tubes.

Phloem parenchyma :-  Phloem parenchyma are long and cylindrical cells and have a dense cytoplasm and nucleus. It helps to store the food in it.

Phloem fibers :- Phloem fibers are sclerenchymatous cells which means they are non-living. As they are made of sclerenchymatous cells then they have thick cell walls and offers mechanical strength.