Transcript Plant-like Protists

Plant-like Protists
Phytoplankton
All are photosynthetic
 Sessile algae
 Are classified according to
their unique characteristics

Phytoplankton

We will study 2 plant-like protists:
1.
Euglena (flagellate)
2.
Spirogyra (sessile algae)
Euglena
 Euglena
gracilis
 Division Euglenophyta
 Movement

– use of flagellum
can also move by changing
it’s shape in a process called
“euglenoid” movement
-
Euglena
 Food
– Photosynthetic
– 6CO2 + 6H2O
C6H12O6 + 6O2
– Euglena can switch to being
heterotrophic if they can’t find any light
(now that’s cool!)
Euglena


1.
2.
3.
Reproduction – Asexual binary
fission
Special Structures
Flagellum – locomotion
Chloroplasts – site of
photosynthesis
Eye spot – light sensitive pigment
Euglena
Spirogyra
 Spirogyra
ternatum
 Division Chlorophyta
 Movement
 Food

– sessile
– Photosynthesis
(You write the equation)
Spirogyra
Reproduction – filaments of spirogyra line
up and connect with conjugation tubes.
 All the contents of the donor cell pass
through the tube into the recipient cell
 The donor cell is now a dead, empty cell
 Since the filamentous cells are considered
haploid (n), the recipient cell is now
considered a zygote (2n)

Conjugation continued
 The
zygote becomes protected by a
Zygospore
 Eventually
the zygote divides by
meiosis to produce more haploid
cells
Spirogyra

1.
2.
3.
4.
Special structures
Conjugation tube
Spiraling chloroplast
Zygote
Zygospore
Spirogyra
Other Phytoplankton
 Volvox
– Division Chlorophyta
Other Phytoplankton
 Diatoms
– Division Chrysophyta
Mycoplankton
 Fungus-like
 Slime
Protists
molds
 Colonial
organisms
 Terrestrial
decomposers
Slime Molds