26 MYCOLOGY FL 19.pptx - MYCOLOGY STUDY OF MOLDS(FILAMENTOUS ORGANISMS AND YEASTS(SINGLE CELLS WHICH PRODUCE PROGENY BY BUDDING USUALLY EUKARYOTES

26 MYCOLOGY FL 19.pptx - MYCOLOGY STUDY OF...

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STUDY OF MOLDS (FILAMENTOUS ORGANISMS) AND YEASTS (SINGLE CELLS WHICH PRODUCE PROGENY BY BUDDING, USUALLY) EUKARYOTES, ANIMALS, 5-10 μM DIAMETER 30 MEGA BASE PAIR GENOMES; SEVERAL CHROMOSOMES; 5,000 GENES CELL WALL WITH CHITIN (N-ACETYL GLUCOSEAMINE POLYSACCHARIDE), ABSORPTIVE NUTRITION, LACK CHLOROPHYLL, NO PHOTOSYNTHESIS FORM SPORES, NON-MOTILE, TOLERATE DRYNESS, HIGH OSMOTIC PRESSURE, ACID AND ALKALINE ENVIRONMENTS SAPROPHYTES - DECAY DEAD CREATURES (& PERMIT RECYLCING) - RELEASE HYDROLYTIC ENZYMES WHICH DIGEST EXTERNAL FOOD MYCOLOGY - 1
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MOLDS - LONG, BRANCHED FILAMENTS - HYPHAE COENOCYTIC - NO PERPENDICULAR CROSS WALLS SEPTATE - WITH CROSS WALLS WITH PORES GROW BY EXTENSION, BRANCHING MYCELIUM - MASS OF HYPHAE - COLONY SPORES - DORMANT, CAN GERMINATE YEASTS - UNICELLULAR, SINGLE NUCLEUS, BUD PROGENY (USUALLY) DIMORPHIC FUNGI - SOME WHICH CAUSE DISEASE - YEAST FORM IN THE ANIMAL, FILAMENTOUS FORM ON CULTURE MEDIA 2
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REPRODUCTION ASEXUAL - MITOSIS FOLLOWED BY: TRANSVERSE CELL WALL FORMATION FORMING TWO EQUAL DAUGHTER CELLS BINARY FISSION BUDDING FORMING MOTHER CELL AND NEW BUD TRANSVERSE CELL WALL FORMATION FORMING SPORES WITHIN A HYPHA OR AT THE END SEXUAL – HOMOTHALLIC - SELF-FERTILIZING, COMPATIBLE GAMETES ON THE SAME MYCELIUM HETEROTHALLIC - CROSSING BETWEEN DIFFERENT BUT COMPATIBLE MYCELIA. HAPLOID GAMETES FUSE; DIPLOID CELLS; MEIOSIS, HAPLOID SPORES 3
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  • Fall '08
  • Whiteley

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