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21.1: Appendix A - Colony Morphology on Agar Plate Cultures

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    122927
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    Colony Morphology: Form of Colony

    form.jpg

    Colony Morphology: Elevation of Colony

    elevat.jpg

    Colony Morphology: Margin of Colony

    margin.jpg

    Colony Morphology: Surface of Colony

    surface.jpg

    Colony Morphology: Pigmentation.

    Pigments can be divided into two basic types: water insoluble and water soluble. If the pigment is water insoluble, as in the case of most chromogenic bacteria, it does not diffuse out of the organism. As a result, the colonies are pigmented but the agar remains the normal color. If the pigment is water soluble (as in the case of Pseudomonas aeruginosa) it will diffuse out of the organism into the surrounding medium. Both the colonies and the agar will appear pigmented.

    State the color of the pigment (red, orange, green, etc.) and its solubility (water soluble or water insoluble).

    Colony Morphology: Optical Characteristics

    Opaque, transluscent, dull, mucoid, dry, etc.

    Contributors and Attributions

    Dr. Gary Kaiser (COMMUNITY COLLEGE OF BALTIMORE COUNTY, CATONSVILLE CAMPUS)


    21.1: Appendix A - Colony Morphology on Agar Plate Cultures is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts.

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