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Bacteria

Bacteria. A Prokaryotic Saga. Bioremediation. Bioremediation refers to the use of living organisms to clean up pollutants and polluted areas Natural Has been occurring throughout the history of life Decomposition of organic matter; natural cycles  Managed

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Bacteria

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  1. Bacteria A Prokaryotic Saga

  2. Bioremediation • Bioremediation refers to the use of living organisms to clean up pollutants and polluted areas • Natural • Has been occurring throughout the history of life • Decomposition of organic matter; natural cycles  • Managed • When man steps in and manages the use of bioremediation  • Ex situ v. In situ : off site v. on site

  3. Examples • Composting • the creation of a decomposing-friendly environment • bacteria break down matter as they would, but faster • Hyperthermophillic bacteria • Help breakdown of Fe(III) and Mn(IV) • Petroleum decomposing bacteria • Promotion of their growth can help clean up oil spills in the ocean and along coastlines • Ethion (pesticide) decomposing bacteria • Major contaminant of rural Australia • When grown in a salt medium, 2 species can break this down • Ability of bacteria to decompose aromatic pollutants

  4. Anaerobic microorganisms Archaea Byproduct: methane gas Very low tolerance for oxygen *Sometimes found in humans Mammals which break down food in two processes. Chew their food twice, second time (cud) Gas is caused by methanogens  Methanogens & Ruminants

  5. Bioluminescent Bacteria • Luminescense is the emission of light by an object • Lux genes code for the enzyme luciferase         -High cell density induces the enzyme         -homoserine lactone •  Reporter Protein and Sensor         - Releases bioluminescent energy         - Check for presence of chemicals • Check for clean up of oil spills

  6. Animal Symbiosis • Mitochondria     -small prokaryotes within larger ones     - respiration inside host cell • Benefits     - engulfed cells dependent on molecules     - host cell dependent on ATP

  7. Symbiosis • Mutualism: Plover bird and crocodile • Commensalism: Mosses and trees •  Parasitism: Tape worm and humans

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