Download 1-biochemical criteria

ALGAE
Position of algae :
According to five king dome classifiction
system whish was suggested by Ropert
wittaker in 1969. the 5 kingdoms were (
monera , protista , plants ,animals ,fungi) . So
algae included in kingdome monera wich
contains cyanophyta or blue green algae and
kingdom protista which contains all other
groups of algae.
Classification of algal division based
on:
1-biochemical criteria:
A-pigments.
B-storge products.
C- cell wall composition.
2-morphologi criteria.
3-genetic differences.
4-many can survive desiccation for several years or have
resting stages that can do so.
Classification:
1 . monera Kingdome:
(cyanobacteria) Cyanophyta.
2. protista Kingdome:
A. Euglenophyta
B. Chlorophyta ( green algae)
C. Chrysophyta( yellow – green)
D. Bacillariophyta (diatoms)
E. Phaeophyta ( brown algae)
F. Rhodophyta ( red algae)
Cyanophyta (cyanobacteria)

Blue-green or cyanobacteria are microscopis cell that grow
naturally in fresh and salt water.

They are a type of bacteria, but som ways act like plants by
photosynthesis.

They grown in dams , Rivers ,creeks ,reservoirs, lakes and hot
spring.
Kingdom : Monera
Division : Cyanophyta
Class : Cyanophyceae
Order : Chroococcales
Family : Chroococcaceae
Genus : 1- Chroococcus
1- Chroococcus
1-occurs in colonies of 2-4
cells.
2 – the cells are generally
spherical to hemispherical
3-independent of one anthor
4-each cell in the colony
produced a gelatinous thin
sheath of its own.and each
colony also.
Kingdom : Monera
Division : Cyanophyta
Class : Cyanophyceae
Order : Chroococcales
Family : Chroococcaceae
Genus : 2- Gloeocapsa
2- Gloeocapsa
1- ehch cell is more or less
spherical in shpe and
surrounded by concentrically
layered sheth of of mucilage
2-these sheaths unite the
cell into extensive gelatinous
colonies.
Kingdom : Monera
Division : Cyanophyta
Class : Cyanophyceae
Order : Chroococcales
Family : Chroococcaceae
Genus : 3- Microcystis
3- Microcystis
1- large numbers of spherical
cell are held within a commoon
mass of mucilage
2- the colonies are always free
– floating.