Lab: Analyzing Fungi Structure and Function

Flashcards covering fungal structure and function, macroscopic and microscopic mushroom anatomy, mycorrhizal networks, mold culture comparisons, and mycelial applications.

What cellular characteristic allows edible mushrooms to absorb flavors readily from dishes in which they are cooked?

Their cellular tissue is porous.

Which two edible mushroom varieties are specifically highlighted in the lab intro as meat substitutes in plant-based diets due to their unique flavors?

Oyster mushrooms and shiitake mushrooms.

What are the three primary macroscopic structures labeled when analyzing a typical mushroom specimen?

The cap, stem, and gills.

What is the biological role of the mushroom structure referred to as the "fruiting body"?

It acts as the reproductive structure, responsible for producing and dispersing spores into the environment.

Which vital underground component of the fungus cannot be seen when examining only the fruiting body, yet is critical for soil and surrounding plants?

The mycelium (composed of branching hyphae).

Based on this Death Cap mushroom lifecycle diagram, which three key anatomical structures are identified across its developmental stages?

The universal veil, the annulus (ring), and the volva.

What does it mean for a fungus to be "mycorrhizal"?

It forms a symbiotic mutualistic association with the root systems of plants, facilitating the reciprocal exchange of nutrients, water, and photosynthetic sugars.

What is horizontal gene transfer in the context of mycorrhizal networks?

The transfer of genetic material directly between different plant organisms through interconnected fungal mycelial networks.

What is myco-restoration?

The process of using fungi (such as oyster mushrooms) to clean up, restore, and filter toxins or pollutants from a contaminated environment.

What target magnifications were specified for observing mold samples under the microscope during the microscopic mold analysis?

$100\times$ and, if possible, $400\times$.

What three primary factors caused varying success rates when culturing mold and mushroom mycelium from around the classroom?

1. Uneven spore distribution and contamination by fast-growing wild molds.
2. Microclimate differences (temperature, sunlight, and moisture levels).
3. Nutrient composition of the substrate, which favored molds over mushrooms requiring complex substrates like wood or grain.

What are the five shared structural, nutritional, and cellular characteristics of mold and mushrooms?

1. Basic Structural Unit: Hyphae (thread-like filaments).
2. The Living Body: Mycelium.
3. Nutritional Function: Heterotrophic decomposers (saprophytes) that secrete digestive enzymes externally and absorb nutrients.
4. Reproductive Strategy: Production of spores.
5. Cellular Composition: Cell walls made of chitin.

How do the macroscopic structures of mold samples differ from those of mushroom samples?

Mold samples form fuzzy, flat, or powdery mats on substrate surfaces, whereas mushroom samples form distinct, complex, macroscopically visible fruiting bodies comprising a cap, stalk, and gills.

How do the spore-producing structures differ between mold and mushrooms?

Mold utilizes microscopic specialized hyphae (such as sporangiophores) that shed spores directly from fuzzy surfaces, whereas mushrooms produce large, specialized reproductive structures (such as gills underneath the cap) designed to release spores into air currents.

How does the cellular organization of mold differ from that of mushrooms?

Mold remains microscopic and loosely arranged throughout its entire life cycle, whereas mushrooms undergo dense, highly organized hyphal compaction to build rigid, macroscopic tissue-like structures.

According to the lab notes, what are three promising societal applications of mycelium highlighted in the "Mycelium: Super Material" resource?

1. Biodegradable & Compostable Packaging
2. Sustainable Construction & Architecture
3. Animal-Free Leather and Sustainable Textiles