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Slime Molds Slime Molds…Whatever Darrin Rubino Hanover College Biology Department.

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Slime Molds Slime Molds…Whatever Darrin Rubino Hanover College Biology Department
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Page 4: Slime Molds Slime Molds…Whatever Darrin Rubino Hanover College Biology Department.

Slime Molds

• So bizarre, long misclassified• Long thought to be a fungi– myxa– mycetes

• Phylogenetic placement– Molecular– Developmental

• Own kingdom• Must understand life cycle to appreciate

Page 5: Slime Molds Slime Molds…Whatever Darrin Rubino Hanover College Biology Department.

Life cycle• Very unique• “Extravagant” life history• Does reproduce sexually (earliest protists)• Variable among species• General– Plasmogamy - join protoplasts– Karyogamy – fusion of nuclei– Meiosis

• Ploidy of structure

Page 6: Slime Molds Slime Molds…Whatever Darrin Rubino Hanover College Biology Department.
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Plasmodium

• Phagotrophs– Bacteria– Yeast– Fungal spores– Decaying matter

• Expand while favorable conditions

• Declining conditions• http://

www.youtube.com/watch?v=p6OoHctERPs

Page 10: Slime Molds Slime Molds…Whatever Darrin Rubino Hanover College Biology Department.

Classification• Approximately 888

different species • Much variation• Class: Myxomycetes• Three subclasses• Six orders

Sporophore developmentSporophore typeSpore productionSpore colorCapillitiaCalcium or lime

Page 11: Slime Molds Slime Molds…Whatever Darrin Rubino Hanover College Biology Department.

1 mm

1 mm

Chocolate tube slimeStemonitis fusca

Yellow-fuzz cone slimeHemitrichia clavata

Page 12: Slime Molds Slime Molds…Whatever Darrin Rubino Hanover College Biology Department.

1 mm

Red raspberry slimeTubifera ferruginosa

Multigoblet slimeMetatrichia vesparium

1 mm

Page 13: Slime Molds Slime Molds…Whatever Darrin Rubino Hanover College Biology Department.

Life History and Ecology• Are these things common?• Did I ever even see one?• Very common in temperate forests

caca de luna

Page 14: Slime Molds Slime Molds…Whatever Darrin Rubino Hanover College Biology Department.

Enteridium lycoperdon

Page 16: Slime Molds Slime Molds…Whatever Darrin Rubino Hanover College Biology Department.
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Life History and Ecology

• “…superficial and largely qualitative” (Ing)• Cosmopolitan• Requirements– Moisture– Temperature– Substrate– pH

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Current Research

• Synchronization of cell division• Senescence• Cancer

• Purified Poly(b-L-malic Acid)• Polycefin (polycephalum)• Deliver antisense gene silencing

therapies

CytologyGeneticsMolecular biologyBiochemistryBiophysicsMitosisMorphogenesisReproduction (cue)PhysiologyAging

Page 25: Slime Molds Slime Molds…Whatever Darrin Rubino Hanover College Biology Department.

Current Research

• Heavy metal clean up– Dog barf slime– Potential plant GMO

• Space – gravity sensing• Novel biological compounds– Trials necessary– Not just novelties (Keller)

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