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Slime Molds. Steven Yeh Pd. 4. What Are They?. 2 groups of protists 1. Plasmodial slime molds 2. Cellular Slime Molds Similar to fungi because of convergent evolution of filamentous body structure Use spores to reproduce and spread to get food like fungi Decomposers like fungi.

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Steven Yeh Pd. 4

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Steven yeh pd 4

Slime Molds

Steven Yeh

Pd. 4


What are they

What Are They?

  • 2 groups of protists

    • 1. Plasmodial slime molds

    • 2. Cellular Slime Molds

  • Similar to fungi because of convergent evolution of filamentous body structure

    • Use spores to reproduce and spread to get food like fungi

    • Decomposers like fungi


Plasmodial slime molds

Plasmodial Slime Molds

  • Brightly pigmented (yellow or orange)

  • All heterotrophic

  • Feeding stage is called plasmodium (amoeboid mass)

    • Diameter of several centimeters at largest

    • Diploid

    • Single mass of cytoplasm undivided by membranes and have lots of nuclei

    • Used to study details of mitosis

    • Cytoplasm streams back and forth in pulsing flows called cytoplasmic streaming; helps distribute nutrients and oxygen

    • Eats by phagocytosis by extending pseudopodia through soil/leaf mulch/logs.


Life cycle of plasmodial slime mold

Life Cycle of Plasmodial Slime Mold


Cellular slime molds

Cellular Slime Molds

  • Feeding stage: solitary cells that function individually

    • When out of food, it then functions like a unit

  • Cells maintain identity and are separated by membranes

  • Haploid (only zygote is diploid)

  • Fruiting bodies used in asexual reproduction

  • No flagellated stages


Life cycle of cellular slime mold

Life Cycle of Cellular Slime Mold


Pictures of slime molds fuligo septica

Pictures of Slime Molds – Fuligo Septica


Myxomycetes and lamproderma

Myxomycetes and Lamproderma


Protostalids

Protostalids


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