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Fungi Lesson Grade 11 Biology University

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by

Nathan Phelan

on 13 December 2010

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Transcript of Fungi Lesson Grade 11 Biology University

FUNGI - HETEROTROPHIC
- SAPROBES, ABSORB THEIR FOOD FROM
DECAYING MATTER (DECOMPOSERS) - THEY RELEASE DIGESTIVE ENZYMES WHICH
BREAKDOWN DEAD ORGANIC MATTER
- FUNGI THEN ABSORB THE DIGESTED FOOD
THROUGH THE CELL WALL - THE BODIES OF MOST FUNGI CONSIST OF
THREADLIKE FILAMENTS CALLED HYPHAE
(MADE UP OF MANY HYPHA)
- AS HYPHAE GROW, THEY BRANCH, FORMING
A TANGLED MASS OF FILAMENTS CALLED
A MYCLEIUM - MOST HYPHAE HAVE CELL WALLS CONTAINING
CHITIN, IT IS TO FUNGI WHAT CELLULOSE IS TO
PLANTS, IT GIVE THE CELL WALLS THEIR STRENGTH REPRODUCTION
- MOST ARE ASEXUAL & SEXUALLY (SPORES)
- SPORES ARE SINGLE REPRODUCTIVE CELLS THAT
HAVE A HAPLOID NUMBER OF CHROMOSOMES (N=1)
- MOST SPORES ARE RELEASED IN LARGE NUMBERS
TO BE CARRIED AWAY ON AIR CURRENTS
- FUNGI GROUPED BASED ON THEIR PATTERNS OF
SEXUAL REPRODUCTION - SPORANGIUM: FUNGI WITH SPORES IN A CASELIKE
STRUCTURE CALLED AN 'ASCUS' DIVISION ZYGOMYCOTA (CASELIKE FUNGI)
- BREAD MOULD
- SEE PG 328
- RHIZOIDS: EXTEND INTO THE FOOD LIKE
ROOTS TO ABSORB WATER AND SUGAR DIVISION ASCOMYCOTA (SACLIKE FUNGI)
- YEAST
- SEE PG 329
- ASCOSPORES: SPORES PRODUCED AS A RESULT OF
SEXUAL REPRODUCTION, PRODUCED IN AN ASCUS
- CONIDIA: SPORES PRODUCED ASEXUALLY, FORMED IN
CHAINS AT THE TIPS OF SPECIALIZED REPRODUCTIVE
HYPHAE DIVISION BASIDIOMYCOTA (CLUBLIKE FUNGI)
- PUFFBALLS, MUSHROOMS & BRACKET FUNGI
- SEE PG 330
- SAPROBES & PARASITES
- BASIDIA: CLUBLIKE REPRODUCTIVE CELL CONTAINING
THOUSANDS OF SPORES - YEAST REPRODUCE BY BUDDING (FIGURE 13.17) - PARASITIC RUSTS - SMUTS HELPFUL FUNGI
- PENICILLIUM CREATES 'PENICILLIN
- AN ASCOMYCETE WHICH GROWS ON ORANGES, DISCOVED BY SIR ALEXANDER FLEMING
- BACTERIA WOULDN'T GROW IN A PETRI DISH
CONTAINING PENICILLIUM (INHIBITION RING FORMED) HARMFUL FUNGI
- TRICHOPHYTON RUBRUM (ATHLETES FOOT)
- THRIVES IN WARM, DAMP PLACES, SUCH AS THE FLOORS OF SHOWERS, POOLS, AND GYMNASIUMS SPORE
FORMATION GERMINATION FUSION MUSHROOM
FORMATION FUSION OF
NUCLEI MEIOSIS PG. 430
FIGURE 13.19 PLANTS VS. FUNGI PLANTS
- HAVE 1 NUCLEUS/CELL
- AUTOTROPHS (MOST)
- ROOTS
- CELLULOSE IN CELL WALLS
- REPRODUCE BY SEEDS (SOME) FUNGI
- OFTEN HAVE MANY NUCLEI/CELL
- HETEROTROPHS
- NO ROOTS
- CHITIN IN CELL WALLS
- NONE REPRODUCE BY SEEDS BOTH
- EUKARYOTIC (COMPLEX STRUCTURES
WITH MEMBRANES)
- HAVE CELL WALLS
- MOST ARE ANCHORED IN SOIL OR SUBSTRATE
- REPRODUCTION: SEXUAL, ASEXUAL OR BOTH
- STATIONARY
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