bioluminescent bacteria animals symbiosis anna thomas hames 4 th period n.
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Bioluminescent Bacteria/Animals Symbiosis Anna Thomas Hames 4 th Period. Bioluminescent Bacteria. Bacteria, living in the oceans, that produce light Microbes easily found in seawater, in marine sediments, in the guts of marine animals, and on the surface of decomposing fish.

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bioluminescent bacteria
Bioluminescent Bacteria
  • Bacteria, living in the oceans, that produce light
  • Microbes easily found in seawater, in marine sediments, in the guts of marine animals, and on the surface of decomposing fish

Under Normal Light (left)

In a dark room (right)

chemical sense
Chemical Sense
  • Bioluminescence is defined as “light emission by living organisms arising by exergonic chemical reactions”
  • What starts the reactions? bacterial luciferase (“light-bringing” enzyme)
  • (FMNH2 + O2 + RCHO  FMN +RCOOH + H2O + Light)

(Note: Not a relationship between animals and bioluminescent bacteria; but interesting)

bioluminescent bacteria1
Bioluminescent Bacteria
  • Genera Vibrio and Photomicrobium
  • Structure: typically curved rods 1 to 3 microns long and motile by flagella

Interesting Event: Bioluminescent bacteria may be emerging as human pathogens. (above: Photorhabdus isolate from patient, put on soy agar plate with sheep blood; glows faintly.)

Light organ of a squid

bioluminescent bacteria animals symbiosis
Bioluminescent Bacteria/Animals Symbiosis
  • Mutualism (both benefit):
  • There are fish and squid that have evolved the ability to use bioluminescent bacteria
  • These animals have specialized organs that provide bioluminescent bacteria with both a safe place to live and a source of food
  • In return the animals can use the light that is produced by the microbes either as a means of camouflage, as an aid in hunting, or even as a way of attracting mates.
examples
Examples

Top left: squid

Top right: anglerfish

Bottom: Flashlight

Fish

examples1
Examples

Bioluminescent bacteria can also help smaller creatures such as shrimp.

  • Funny Anglerfish song: http://www.youtube.com/watch?v=9t7E4amWDqI
  • For class presentation: http://www.youtube.com/watch?v=UXl8F-eIoiM&feature=fvw
review questions
Review Questions
  • Where is bioluminescent bacteria found?
  • What kind of relationship exists between bioluminescent bacteria and animals?
  • How does bioluminescent bacteria move?
  • What are two examples of the symbiotic relationship of bioluminescent bacteria and animals?
  • What makes fish and squid a desirable place for bioluminescent bacteria?
  • What are three ways animals benefit from bioluminescent bacteria?
answers
Answers
  • seawater, marine sediments, guts of marine animals, and surface of decomposing fish
  • mutualism
  • flagella
  • angler fish, flashlight fish, squid
  • safe place to live and a source of food
  • camouflage, as an aid in hunting, or a way of attracting mates.
sources
Sources:
  • http://dictionary.reference.com/browse/symbiosis
  • http://74.125.47.132/search?q=cache:uLcswwSx2pYJ:animals.howstuffworks.com/animal-facts/bioluminescence4.htm+bioluminescent+bacteria/animal+symbiosis&cd=6&hl=en&ct=clnk&gl=us
  • http://74.125.47.132/search?q=cache:1zB5a2n6PS4J:www.ms-starship.com/sciencenew/symbiosis.htm+animal+symbiosis&cd=7&hl=en&ct=clnk&gl=us
  • http://cibt.bio.cornell.edu/programs/archive/0608alum/lumos.pdf
  • http://images.google.com/imgres?imgurl=http://filebox.vt.edu/users/chagedor/biol_4684/Methods/marinefish.jpg&imgrefurl=http://filebox.vt.edu/users/chagedor/biol_4684/Methods/bioluminescence.html&usg=__BFdFQRc802UlXsFp8Wlh3uPOWZw=&h=260&w=340&sz=18&hl=en&start=21&tbnid=mDcwwj8vUEzGlM:&tbnh=91&tbnw=119&prev=/images%3Fq%3Dbioluminescent%2Bbacteria%26gbv%3D2%26ndsp%3D18%26hl%3Den%26sa%3DN%26start%3D18
  • http://images.google.com/imgres?imgurl=http://www.cdc.gov/ncidod/EiD/vol9no2/images/02-0222_1b.jpg&imgrefurl=http://www.cdc.gov/ncidod/EiD/vol9no2/02-0222-G1.htm&usg=__M5oHXFuC8MVCaO8AFAf6P22Y9Bw=&h=474&w=600&sz=48&hl=en&start=29&tbnid=-UqSUvqeuLYoMM:&tbnh=107&tbnw=135&prev=/images%3Fq%3Dbioluminescent%2Bbacteria%26gbv%3D2%26ndsp%3D18%26hl%3Den%26sa%3DN%26start%3D18
  • http://dictionary.reference.com/browse/mutualism
  • http://images.google.com/imgres?imgurl=http://curiousexpeditions.org/wp-content/uploads/2008/03/euphausiid.jpg&imgrefurl=http://curiousexpeditions.org/%3Fp%3D233&usg=__pX1OwY480Nsy4xU06m8vX3QFsB8=&h=281&w=630&sz=34&hl=en&start=4&tbnid=Nku6I6TeHrA3BM:&tbnh=61&tbnw=137&prev=/images%3Fq%3Dbioluminescent%2Bbacteria%2Bfish%26gbv%3D2%26hl%3Den