LAB 4 Actinomycetes

Question 1

what are actinomycetes

Answer 1

they are common soil bacteria which have a similar lifecycle to that seen in fungi, these are also the source of many antibiotics

Question 2

What does the life cycle of a actinomycetes look like

Answer 2

1) germination–> spores settle in nutrient rich medium and exit the dormant state and begin growth via binary fission

2) vegetative growth–> banching of germ tubes occurs forming a network of filaments which growth across the surface of the substrate this network is called mycelium

3) Aerial Growth–> in response to nutrient depletion mycelium begins to differentiate and the organism begins to grows upward forming aerial hyphae

4) aerial hyphae undergo cell division forming many monoploid compartments which develop into spores

Question 3

What is antibiosis

Answer 3

when a bacteria is able to produce a antibotic which clears nearby bacteria (zone of clearing)