FUNGUS like PROTISTS CAUGHT IN THEIR SLIME JRMG

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FUNGUS- like PROTISTS: CAUGHT IN THEIR SLIME JRMG 2008 -2009

FUNGUS- like PROTISTS: CAUGHT IN THEIR SLIME JRMG 2008 -2009

REVIEW • What are protists? • Reason of their position in the 6 -Kingdom

REVIEW • What are protists? • Reason of their position in the 6 -Kingdom classification scheme • Why do we have to study them?

SLIME MOLDS • Presence of food source • Extremely difficult to classify – Ameba-like

SLIME MOLDS • Presence of food source • Extremely difficult to classify – Ameba-like cells – Mold-like masses (spores) • Amebas and fungi • Can be: – ACRASIOMYCOTA – MYXOMYCOTA

PHLYLUM ACRASIOMYCOTA • Cellular slime molds – Individual cells (amebas) • Free living •

PHLYLUM ACRASIOMYCOTA • Cellular slime molds – Individual cells (amebas) • Free living • Fast reproduction • UNFAVORABLE conditions – gather together – Primitive multicellular organism

 • Solid masses – Fruiting bodies • Spores (mitosis) – ameboid cells •

• Solid masses – Fruiting bodies • Spores (mitosis) – ameboid cells • Showed how cells communicate – Still not explained (fruiting body from a single free-living cell) http: //images. google. com. ph/imgres? imgurl=http: //www. nsf. gov/news/special_reports/fibr/images/dictyo_nofla sh. jpg&imgrefurl=http: //www. nsf. gov/news/special_reports/fibr/dictyo. htm&usg=__Hztp 9 NYunn 0 hzu. LZ 8 j Ubey. F_vxs=&h=600&w=400&sz=30&hl=en&start=7&tbnid=HJv 3

PHYLUM MYXOMYCOTA • Acellular slime molds • Ameba-like cell – plasmodia – Plasmodia- thousands

PHYLUM MYXOMYCOTA • Acellular slime molds • Ameba-like cell – plasmodia – Plasmodia- thousands of nucle in a single membrane • Mutinucleate cell • Fruiting bodies – Grow from the plasmodium – Spores (meiosis) – flagellated cells – Flagellated cells fuse = ameboid (2 n)