intro to mycology

mycology

is the study of fungi.

fungi

1. They have a filamentous branching of system of cells with apical growth, lateral branching and heterotrophic nutrition

fungi

2. They are characterized by a life-cycle that begins with germination from spore or a resting structure, followed by a period of growth the substrate is exploited to produce a biomass

fungi

there is a period of sporulation where propapules are formed that can be disseminated from the parent mycelium.

fungi

2. They are major cause of plant diseases

spore production

3. The most common method of asexual reproduction

Asexual spore formation

occurs in an individual fungus through mitosis and subsequent cell division

hypha

can fragment to form cells that behave as spores

Arthroconidia or Arthrospores

Hypha can fragment to form cells that behave as spores. These cells are called

2. Somatic vegetative cells

may bud to produce new organisms.

This is common in yeasts

chlamydospores

If the cells are surrounded by a thick wall before separation

sporangiospores

If the spores develop within a sac (sporangium/sporangia) at a hyphal tip

comdiospores

If the spores are not enclosed in a sac but produced at the tips or sides of the hypha

blastospores

spores produced from a vegetative mother cell by budding

sexual reproduction

Involves the union of compatible nuclei

homothallic

Some fungal are self-fertilizing and produce asexually compatible gametes on the same mycelium

heterothallic

Other species require out crossing between different but sexually compatible mycelia

spores

Sexual reproduction yields?

Fungi Metabolism

Fungi prefer moist habitat and they are largely mesophyllic preferring temperature between 15 and 350C

15-350°C

Fungi prefer moist habitat and they are largely mesophyllic preferring temperature between?

a. Parasitism of plants and animals

• Causing diseases

b. Saprophytism

• Growing on dead animal, plant or microbial biomass

symbiosis

• Growing together with algae, plants or insects

thallus (thalli)

The body or vegetative structure of fungus is called

cell wall of chitin

The fungal cell is enclosed in