Module 10: Metabolic Partnerships

• syntrophy: 2 organisms cooperate to degrade a substrate
• in syntrophy the producer relies on the consumer
• syntrophomonas oxidize butyrate to acetate to make ATP
• what is e- donor, e- acceptor, and product of syntrophomonas?

  e- donor: butyrate

  e- acceptor: protons

  product: H2
• what makes syntrophomonas reaction favorable?

  methanogens removed H2 by interspecies H transfer
• what is the relationship between syntrophomonas and methanogens?

  producer: syntrophomonas

  consumer: methanogens
• fill in the producers and consumers

  A) anaerobe

  B) methanogen

  C) methanotroph

  D) sulfur reducer

  E) photolithotroph

  F) sulfur reducer

  G) fermenter

  H) respirer

  
• aerobic degredation: aerobic respiration consumes O2 and produces oxidized products (CO2, nitrate, sulfate)
• anaerobic degredation: nitrate and sulfate respiration, fermentation if needed
• fermentation produced partially oxidized products used by acetogens, methanogens, and syntrophs
• when sulfate is available in anaerobic degredation, sulfate reducing bacteria outcompetes
• complete the diagram

  A) methanogens

  B) sulfate reducers

  C) methanogens

  D) sulfate reducers