Chrysophyceae (golden algae)

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Chrysophyceae(golden algae)

• By Stephen Zevgolis

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Introduction

• Algae with golden chloroplasts, used for
  photosynthesis.
• Live in freshwater primarily, but also on moss
  and wetlands.
• Lacks true cell walls.
• Both motile and non-motile forms exist.

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Key Features

• Yellowish-brown in color.
• Chloroplasts contain chlorophyll 1, chlorophyll
  2, and fucoxanthin.
• If theres a lack of nutrients, they can switch
  from autotrophs to heterotrophs by creating
  pseudopods.
• Both sexual and asexual reproduction.

Phaeoplaca
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Significance in the Biotic Environment

• These algae make up parts of the nanoplankton.
• Therefore, they play a role in the foundation of
  the food chain.
• Some types of Chrysophyceae can cause poor
  freshwater quality.

Dynobryon
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Significance for Humans

• Fucoxanthin, a pigment in golden algae, is being
  researched as a treatment for weight loss.
• Hokkaido University study indicated that it can
  promote weight loss by increasing the expression
  of thermogenin.
• However the study has only been done on mice.

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Forms of Chrysophyceae
A Flagellated form, no cell wall
Mallomonas, unicell
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More Forms
Chrysamoeba radians- vegetative states
Phaeothamnion confervicola