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Lecture

DICTOSTEIOMYCOTA.docx

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Department
Biology
Course Code
BIOL-2152
Professor
Kent Simmons

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DICTOSTEIOMYCOTA Cellular slime molds Found on all continents In cultivated and native soils Provide an excellent biological system for the study of cell communication and morphogenesis  Vegetative stage Individual cels called myamoebas Feed by phagocytosis, reproduce by simple cell division when the food supply is plentiful  When food source depleted, cell secretes hormonal attractant. Cyclic AMP is the signal molecule,  when It comes in contact with an amoeba, it stimulates cyclic AMP secretion. It is a directional  secretion causes individuals to aggregate together  Unfavourable conditions: microcysts. Rigid cellulose cell wall  Congregate together, they act as a single organism:pseudoplasmodium / slug Slug topples over, starts to migrate towards light, for a bette
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