Module 7 The Fungi

Three general features of fungal anatomy?

• Membrane bound organelles

• Nucleus

• Mitochondria

• Single celled, sometimes in colonies

Heterotroph

Organism that cannot produce its own food

Saprobe

Organism that feeds and grows on dead organisms

Parasite

Organism that lives in, on, or with another organism (host) and feeds and grows kr multiplied at the expense of host

Fungal Forms (gene based)

• Yeast cell

• Hyphae

• Dimorphic

• Pleomorphic

yeast cell

• round oval shape

• Asexual reproduction

Hyphae

• Long threadlike cells found in filaments

• Fungi = mold

• MOLD IS MADE OUT OF HYPHAE

Dimorphic

• Some fungi can take either form

• Depending on environment temp

Thermally Dimorphic

• mold when growing saprophytically at room temp

• Yeast when in animal tissues at human temp

Fungal Structure

Grow in loose associations or colonies

• Mycelium: woven intertwining mass of hyphae; make up body or colony of mold

• Septa: hyphae divided into segments or cross wall

• Spores: fungal reproductive bodies * easy to kill not endospores

Fungi cell envelope

Have cell walls containing chitin- polysaccharides