ALGAE TYPES

1. NAME : SHIPRA RATHOUR
ROLL NO. : 2022/10/090
COURSE : BSC BOTANY (H)
SUBJECT : DSC 7
PHYCOLOGY – THE WORLD OF ALGAE

2. CHARA
Chara is a genus of charophyte
green algae in the family
Characeae. They are multicellular
and superficially resemble land
plants because of stem-like and
leaf-like structures. They are found
in freshwater, particularly in
limestone areas throughout the
northern temperate zone, where
they grow submerged, attached to
the muddy bottom. They prefer
less oxygenated and hard water and
are not found in waters where
mosquito larvae are present.

3. FUCUS
Fucus is a genus of brown algae
found in the intertidal zones of
rocky seashores almost throughout
the world. The thallus is perennial
with an irregular or disc-shaped
holdfast or with haptera. The erect
portion of the thallus is
dichotomous or subpinnately
branched, flattened and with a
distinct midrib. Gas-filled
pneumatocysts are present in pairs
in some species, one on either side
of the midrib.

4. POLYSIPHONIA
Polysiphonia is a red algae, polysi-
phonous and usually well branched,
with some plants reaching a length of
about 30 cm. They are attached by
rhizoids or haptera to a rocky surface
or other alga. The thallus consists of
fine branched filaments each with a
central axial filament supporting
pericentral cells. The number of these
pericentral cellS is used in
identification. Polysiphonia elongata
shows a central axial cell with 4
periaxial cells with cortical cells
growing over the outside on the older
fronds.

5. CYANOBACTERIA
Cyanobacteria Also called Cyano-
bacteriota or Cyanophyta, are a
phylum of gram-negative bacteria
that obtain energy via
photosynthesis. The name
cyanobacteria refers to their color
(from Ancient Greek κύανος, which
similarly forms the basis of
cyanobacteria's common name,
blue-green algae, although they are
not usually scientifically classified
as algae. They appear to have
originated in a freshwater or
terrestrial environment.