anoxygenic

Examples of anoxygenic in the following topics:

• Anoxygenic Photosynthesis

  • Photosynthetic reactions can be anoxygenic, thus they do not produce oxygen.
  • Chlorophototrophy can further be divided into oxygenic photosynthesis and anoxygenic phototrophy.
  • There are several groups of bacteria that undergo anoxygenic photosynthesis: Green sulfur bacteria , green and red filamentous anoxygenic phototrophs (FAPs), phototrophic purple bacteria, phototrophic Acidobacteria, and phototrophic heliobacteria.
  • Anoxygenic phototrophs have photosynthetic pigments called bacteriochlorophylls (similar to chlorophyll found in eukaryotes).
  • Discuss the characteristics that classify a specific type of chlorophototrophy as anoxygenic photosynthesis

• Anoxygenic Photosynthetic Bacteria

  • Some groups of bacteria can capture light energy and convert it to ATP without the production of oxygen through anoxygenic photosynthesis.
  • Chlorophototrophy can further be divided into oxygenic photosynthesis and anoxygenic phototrophy.
  • There are several groups of bacteria that undergo anoxygenic photosynthesis: green sulfur bacteria, green and red filamentous anoxygenic phototrophs (FAPs), phototrophic purple bacteria, phototrophic acidobacteria, and phototrophic heliobacteria.
  • Anoxygenic phototrophs have photosynthetic pigments called bacteriochlorophylls ; these are similar to chlorophyll found in eukaryotes.
  • Unlike oxygenic phototrophs, anoxygenic photosynthesis only functions using either one of two possible types of photosystem.

• Chloroflexus and Relatives

  • Chloroflexus are Gram-negative filamentous anoxygenic phototrophic organisms that utilize type II photosynthetic reaction centers.
  • As a genus, Chloroflexus spp. are Gram-negative filamentous anoxygenic phototrophic (FAP) organisms that utilize type II photosynthetic reaction centers containing bacteriochlorophyll a similar to the purple bacteria, and light-harvesting chlorosomes containing bacteriochlorophyll c similar to green sulfur bacteria of the Chlorobi.
  • As the name implies, these anoxygenic phototrophs do not produce oxygen as a byproduct of photosynthesis, in contrast to oxygenic phototrophs such as cyanobacteria, algae, and higher plants.
  • The Chloroflexi or Chlorobacteria are a phylum of bacteria containing isolates with a diversity of phenotypes including members that are aerobic thermophiles, which use oxygen and grow well in high temperatures, anoxygenic phototrophs, which use light for photosynthesis, and anaerobic halorespirers, which use halogenated organics (such as the toxic chlorinated ethenes and polychlorinated biphenyls) as energy sources.

• Alphaproteobacteria

  • Aerobic anoxygenic phototrophic bacteria are alphaproteobacteria, widely distributed marine plankton that may constitute over 10% of the open ocean microbial community.

• Gas Requirements

  • Often, they respire oxygen as rapidly as it is supplied, keeping the amount of free oxygen low. 3) Aerobes that require oxygen to grow, yet their nitrogenase is still debilitated if exposed to oxygen. 4) Oxygenic photosynthetic bacteria generate oxygen as a by-product of photosynthesis, yet some are able to fix nitrogen as well. 5) And finally, Anoxygenic photosynthetic bacteria that do not generate oxygen during photosynthesis as they have only a single photosystem which cannot split water.

• Benzoate Catabolism

  • In the absence of water-splitting, photosynthesis is anoxygenic.