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MICROBIOLOGY AND IMMUNOLOGY (BIOL200/343), SUMMER, 2017
Lecture:6 MICROBIOLOGY AND IMMUNOLOGY (BIOL200/343), SUMMER, 2017 Dr.Q.M.I.Haq
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Fungi These are saprophytic or parasitic organisms possessing relatively rigid cell walls, compose of chitin. Fungi (singular: fungus) are Eukaryotes They may be unicellular (yeast)- are oval in shape larger than bacteria OR multicellular (mold)- form visible masses called mycelia compose of long filaments ( hyphae) cottony growths on breads & fruits. Large multicellular like mushroom look somewhat like plant but they are not photosynthesis The largest and most versatile of all microbes.
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Fungal Structure Sporangia: Spore producing body. Sporangiophore:
Rhizoids Sporangia: Spore producing body. Sporangiophore: Filamentous stalk on which the sporangium forms. Rhizoids: The sub-surface hyphae are specialized for food absorption.
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Saccharomyces cerevisiae
Commonly studied strain of yeast Microorganism behind the most common form of fermentation 1st eukaryotic organism to have its complete genome sequenced
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Diameters in the range of 2-100 μm.
Protozoa These are unicellular Eukaryotic microbes/organisms with protoplasm differentiated into nucleus and cytoplasm. Diameters in the range of μm. Move by flagella, cilia, pseudopods Have variety of shapes. Lives free or as parasite The most important groups of medical protozoa are: Amoeba, mastigophora, Ciliophora and Sporozoa
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Algae are also Microbes
Algae photosynthesise – taking their energy from the sun, and producing oxygen in the process. Algae are thought to produce over 50% of the oxygen in the world. Are photosynthesis Eukaryotes with wide variety of shapes Cell wall like plants are compose of cellulose Chlorella
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