The Kingdom Fungi

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The Kingdom Fungi

• Section 21-1

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What Are Fungi?

• Eukaryotic
• Heterotrophic digest food outside of their
  bodies, then absorb it
• Cell walls made of chitin

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Structure Function of Fungi

• Multicellular, except for yeast
• Composed of hyphae (thin filaments one cell thick)

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Structure Function of Fungi

• Body composed of mycelium (many hyphae tangled
  together)
• Fruiting body reproductive structure growing
  from the mycelium

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Reproduction in Fungi

• Most asexually and sexually
• Asexual
• cells or hyphae break off and grow on their own
• Spores

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Reproduction in Fungi

• Sexual
• 2 different mating types plus and minus
• Hyphae fuse form diploid zygote nucleus
• Enters meiosis and produces haploid spores

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How Fungi Spread

• Spores scattered by wind
• Some lure animals to disperse spores
• Stinkhorns smell like rotting meat to attract
  flies

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Ecology of Fungi

• Section 21-3

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All Fungi Are Heterotrophs

• Saprobes obtain food from decaying organic
  matter
• Parasites harm hosts
• Symbionts live in close and mutually beneficial
  association with other species

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Fungi as Parasites

• Plant diseases
• Corn smut destroys corn kernels
• Mildews
• Wheat rust
• Human diseases
• Athletes foot
• Ringworm
• Yeast infections