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Diversity
Eukaryotes
“Protists” —> a) unicellular
b) multicellular
c) heterotrophic
Unicellular:•
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Euglenophyta
Cryptophyta
Dinophyta (dinoflagellates)
Haptophyta
Bacillario phyta (diatoms) [Heterokont]
Chrysophyta
[Heterokont]

Classification:
By pigment [chlorophyll type [a, b, c, d etc]; carotenoid; bilin]
By food storage [e
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Unicellular- closely related
to each other
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• Protist Diversity- Think of it in terms of classification, which groups are which,
use a couple of techniques
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Basically on pigment- have chlorophyll which have different types
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Allows us to separate
clades of protists based on difference in pigments
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Only one chemical difference between the
two
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Methyl is more
reduced than an aldehyde
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Defines protists groups based on pigment
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Differentiates based on a colour difference
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All have a
significant difference based on colour but function is the same
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Some of them are made
of glass (silicon)
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Think about all
three aspects- pigment, cell wall and food source when classifying
protists
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Dinophyta- has a transverse flagellum
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Dino means that it has one that
makes it goes forward and one that makes it go in circles (reverse)
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Dinophytes are heterotrophs and have glass
walls
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Shape shifting occurs due to its
outer wall that protects it
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Have an eye spot
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Rhodopsins are found in all kingdoms: prokaryote and
eukaryotes
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Chloroplasts absorb blue light because of photosynthesis
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Volvox aureus - colonial multi cellular structure
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Can see flagella rowing the solution in the cell (stirring)
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This is what occurs in
protists- this appearance of multicellularity
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The internal structures- the wall that allows for the shape
shifting is the cell wall [proteinaceous pellicle]
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The
food storage that occurs within the euglena is the paramylon
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Think of appearance of chloroplasts
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Suggests that
there are three membranes within the euglenophyta chloroplasts
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Usually would result in 4 membranes however one may have
disintegrated over time resulting in 3
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Interesting because it has bilons- linear
pyrolle structure
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Dinophyta [dinoflagellates]
• Dangerous if grown in culture
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Has on its
surrounding wall a cellulose thecal walls [cellulose plates]
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Condensed chromosomes
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Thing that makes its dinoflagellates
unusual is that they have hundreds of chromosomes present in it
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Nucleus behaving as a cell
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Has chlorophylls a and c and has starch as its
storage component similar to higher plants
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