cell specialisation in plant (biology form 4)

Cell specialisation

Cell undergoing differention to carry a specific function.

Differention- Cell change it structure or shape in order to carry specific

function efficiently.

Xylem vessel

transport water from root to the leaves

support plant(mechanical strenght)

Differentiation of xylem

• Deposition of lignint

support• Elimination of cytoplasm- dead tissue

(reduce obstacle)• Elimination of the joined end wall to form

hollow tiub.

(enable water move in one water column continuosly)

Other examples

phloem

Specialised structure

• Seive plate• Seive tube

• Thin layer of cytoplasm

Live cell

function

Transport organic substances/ food from leaves to all parts of plant.

translocation

Specialised structure

• Long projection elongate from an epidermal cell

• To increase surface area • Enable more water absorbed by

root

Specialised structure

• Contain chloroplast ( not present in others epidermal cell like onion)• Thick inner wall• Thin outer wall

A type of epidermal cell

Function of guard cell

Control opening and closing of stomata.

Function oF stoma

Epidermal tissue

SPECIALISED AND FUNCTION

• MANY CHLOROPLAST• ARRANGE VERTICALLY• CLOSELY

• TRAP MORE LIGHT TO CARRY PHOTOSYNTHESIS

Plant cell

Parenchyma

OTHERS PLANT CELL