Transcript Rhodopyhta - Bio Resource Site | Stuff from Ma'am Dawn

Rhodophyta
Characterized
byastheir
branching.

They
are
also
known
as red
 Store
sugars
glycogen
or
algae
or rhodophytes.
 Floridean
They are
able
to thrive at deeper
starch
depths of are
the ocean
compared to
 They
multicellular
 A algae.
long chain of glucose
other
organisms.
sugars
withfound
lots along
of side
 Characterized
They
are mostly
the

by
coastal
and continentalpigments
shelf areas
photosynthetic
branches.
of tropical,
and coldsuch
as temperate
phycoerythrin,
water regions.
phycocyanin
and
 allophycocyanins,
It consists of approximately
and 5000
the
genera and 5000
absence
of species.
flagella and
 centrioles.
It is one of the most ancient
eukaryotes,
fossils
that date
 They
don’twith
have
chloroplast
back to the mid-proterozoic.
endoplasmic
reticulum.
Structures
Open
Spermatangia
Red,
algal cell wall

protoplasmic
– Male
organ,
An innerreproductive
layer with cellulose.
connection
withouter
spermatia
– filled
Gelatinous
layer. (male
reproductive cell).daughter
—
– connects
Contain amorphous mucilages
Carpogonium
(shapeless mucuses).
cells.
– Female reproductive organ.
 Nuclei

Pitplug

Trichogyne
 Chloroplasts
–
receptor
of the
—
closeslike
the
connection
– Hair
Contain
phycobilins,
chlorophyll
carpogonium.
a, carotenes, xanthophylls.
between
2 daughter
 Cytoplasm
 Phycobilisomes
–cells.
Forms floridean starch
– Involved in photosynthesis
Reproduction
 Reproduce both sexually and asexually.
 The spermatium relies on water to reach the
carpogonium.
 It makes contact with trichogyne and its nucleus merges
with that of the carpogonium.
 The carpogonium forms a large bulb, which separates
and becomes young red algae.
Nutrition
 They obtain energy through
photosynthesis.
 Some rhodophytes were
found to be parasitic in
nature.
Ecology
 Someare
transport
from
 Most
foundnutrients
in marine
their host through
aahaustoria.
ecosystems,
while
few are
 Coralline red alga is essential
found
in freshwater.
in
marine
ecosystems because
 Some transfer their nuclei into
they
are
reef-building
the host plant and hijack the
organisms.
 They
attached to
host. live
 They
produce
calcium
surfaces.
carbonate in their cell walls.
 They harness light efficiently,
 Some red algae have been
which enables them to live at
found
to be parasitic
great depths.
Examples
They
are
often
attached
to
Appear
in their
Galaxaura

The
tips
spp.
ofgreen
itsfound
branches
have
Porphyra
Corallina
officinalis
tenera
rocks
orstages.
mollusk
shells. It is abundant
early
a
central
hole.
Marine
species,
also
known as

Tubular
thicket
algae.
It
is
also
known
as
nori.
especially
onbrownish-purple
exposed coasts.
Appear
or
coral
weed.

They
are
redish
to
orange

Heavilyred
calcified
and forms
Small,
alga.
purple-red
incarbonate
maturity.
and
off-white
indomes,
color.within
The
calcium
its
hemispherical
up to
Whitish-pink
to
lilac
in
color.
They
live crinkled
on itsexposed
They
have
edges
cell
walls
strengthens
structure

15
They
cm,
are
attached
most
by
commonly
a
single
coasts
and
are
attached
toa
and
causes
it able
to appear
pink. This
and
are
to
reach
 Its
calcified,
branching
and
holdfast
found
attached
or
root.
to
rocks
or
rocks
or
mollusks.
substance also protects them from
segmented
reach up to 12 cm
width
offronds
20
cm.
rocky
surfaces.

Its
segments
branch
being
eaten
by
shore
grazers.
They
also
foundout
in
in lengthcan
from
a be
crustose,
disk
They
irregularly
dichotomously.
the
midtidal
to splash
zone.
shaped
root. are
Serve
as most
a leaf-like
home
for small
shaped,
and
They
are
abundant
in

Its
segments
are
tubular
organisms
which
eat
the
Urn-shaped
reproductive
organs.
temperatures
between
4-9
membranous.
shape, smooth,
hard
microorganisms
living on and
it.
°C with flexible joints
60-70 mm high
Sources
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http://www.ehow.com/how-does_4574307_algae-reproduce.html
http://lifeofplant.blogspot.com/2011/01/red-algae.html
http://marinelife.about.com/od/plants/p/redalgae.htm
http://www.microscopyuk.org.uk/mag/indexmag.html?http://www.microscopyuk.org.uk/mag/artmar99/red.html
http://university.uog.edu/botany/Plant_Di/rhodophyta.htm
http://www.algaebase.org/search/species/detail/?species_id=107
http://www.marlin.ac.uk/speciesinformation.php?speciesID=3039
http://porphyra.wetpaint.com/
http://www.fao.org/fishery/species/2790/en