Categorie: Tutti - bacteria - pathogens - reproduction - archaea

da Jeanette Castano mancano 5 anni

197

Prokaryotes

Prokaryotes are diverse organisms characterized by their simple cellular structure and significant ecological roles. They encompass various lifestyles, often thriving in extreme environments like high salinity, acidity, or temperature, known as extremophiles, which includes halophiles, acidophiles, thermophiles, psychrophiles, and alkalinophiles.

Prokaryotes

Prokaryotes (Jeanette Castano)

Ecological Interctions

Parasitism
endotoxins

Released only when bacteria die.

exotoxins-

secreted and cause disease.

Commensalism
one benefit, the other is neither harm or helped
Mutualism
Both organism benefit
Symbiosis
Two species ive in close contact: larger-smaller
Biofilm
Teeth plaque

Archea

Euyarchaeota
Korarchaeota
Crenarchaeota
Aigarchaeota
Thamarchaeota

Bacteria

Gram positive Bacteria
Mycoplasms- smallestknow cells
staphylococcus
clostridium botulinum- cause of botulism
Bcillus anthracis- cause of anthrax
Actinomycetes- decomp soil
Involve in the process of endosymbiosis
Photoautotrophs
Spirochetes
Treponema, pallidum (syphilis) and borrelia.
Helical heterotrphs
Chlamydias
Causes blindness
Live in animal cells
Proteobacteria (Gram-Negative)
Epsilon

Helicobacter Pylori- stomach ulcers

Campylobacter- blood poisoning

Delta

Myxobacteria- produces drought resistant "myxospores"

Gamma

Escherichia coli resides in the intestines

Legionella

Salmonella

Thiomargarita namibiensis

Beta

Soil bacterium Nitrosomas

Alpha

Used in genetic engineering.

Agrobacterium- tumors in plants

Shape
Spirilium (spiral)
Bacillus (Rod-shape)
Coccus (Spherical)

Uses of prokaryotes

Bio engineering
Vitamins, antibiotics and hormones
Biomediation
Use of organisms to remove pollutants from environment. (oil spills)
Make Plastic
Bacteria synthesizing and storing PHA
Transgenic Plants
Agrobacterium
Cloning
E.coli

Lifestyle

Extremophile
Psychrophiles
Alkalinophiles
Acidophiles
Thermophiles
Halophiles

Nutritional categories

Metabolism
Decomposers

Breaking down dead organism

Methanogens
Nitrogen fixers

Nitrogen bond turned into AA

Facultative Anarobes

can survive with or without O2

Obligate anaerobes

Fermentation

Obligated aerobes

cellular respiration

Energy and Carbon Source
Photoheterotroph

Rhodobacter

Chemoheterotroph-

animals

Chemoautotroph

Sulfolobus

Photoautotroph

Cyanobacteria

Reproduction

Sexual
Horizontal gene transfer

Transduction

Infect bacteria

Conjugation

DNA and pilus.

Transformation

cell incorporate foreign DNA

Asexual
Binary Fission