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Bioluminescent
Bacteria-Animals Symbiosis
Seri Perkuliahan MK Mikroba Simbion
https://www.youtube.com/watch?v=9HXXQBz6Vv0
Bioluminescence Phenomena
• Bioluminesensi adalah emisi cahaya yang dihasilkan
makhluk hidup karena reaksi kimia tertentu. Emisi cahaya
yang dihasilkan berasal dari enzim yang sudah dikatalis
melalui reaksi oksidasi. Enzim yang terlibat disebut
enzim luciferin dan enzim luciferase, umumnya dihasilkan
oleh bakteri laut.
• Beberapa hewan dapat mengeluarkan cahaya jika
bersimbiosis dengan bakteri luminous, yaitu bakteri yang
dapat menghasilkan cahaya.
Bioluminescence
Symbiosis of Bacteria & Animals
Examples of bioluminescence
and symbiosis:
• Squids
• Flashlight Fish
• Pinecone Fish
• Lantern fish
a Flashlight Fish
• Biasanya berukuran 0,0002 cm
• Gram (-), Umumnya batang
melengkung, motil dgn flagela
• Secara alami menghasilkan cahaya.
a Pinecone Fish
a Lantern fish
Where are they found?
— Air laut
— Saluran pencernaan ikan
— Permukaan ikan yang
membusuk
— Hubungan simbiosis dengan
hewan tertentu
— Angler Fish, Bobtail Squid,
Flashlight Fish
Flashlight Fish, bakteri hidup di daerah
berbentuk kacang di bawah mata.
Angler Fish
Bioluminescent Bacteria
• Usually about .0002
cm
• Typically curved
rods, motile by
flagella
• Naturally produce
their own light
“Milky Sea” of bioluminescent bacteria
Bioluminescent Bacteria-Squids
• Bakteri hidup dalam organ cumi-
cumi untuk memperoleh nutrisi
berupa karbon dan asam amino,
dan sebagai imbalannya mereka
menyembunyikan siluet cumi-
cumi ketika dilihat dari bawah
dengan menyesuaikan jumlah
cahaya yang mengenai bagian
atas mantel.
Bobtail Squids
How do they do it?
— Yang cukup menarik,
cahaya hanya diproduksi
ketika sel-sel pada
kepadatan tinggi.
— Cahaya diproduksi melalui
reaksi kimia oksidatif.
— Quorum Sensing:
kemampuan bakteri untuk
mengatur ekspresi gen
dalam menanggapi
kepadatan sel.
Pada bakteri expresi gen bioluminescece dikontrol oleh
operon yang disebut “Operon Lux”.

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Bioluminescent.pdf

  • 1. Bioluminescent Bacteria-Animals Symbiosis Seri Perkuliahan MK Mikroba Simbion https://www.youtube.com/watch?v=9HXXQBz6Vv0
  • 2. Bioluminescence Phenomena • Bioluminesensi adalah emisi cahaya yang dihasilkan makhluk hidup karena reaksi kimia tertentu. Emisi cahaya yang dihasilkan berasal dari enzim yang sudah dikatalis melalui reaksi oksidasi. Enzim yang terlibat disebut enzim luciferin dan enzim luciferase, umumnya dihasilkan oleh bakteri laut. • Beberapa hewan dapat mengeluarkan cahaya jika bersimbiosis dengan bakteri luminous, yaitu bakteri yang dapat menghasilkan cahaya.
  • 3. Bioluminescence Symbiosis of Bacteria & Animals Examples of bioluminescence and symbiosis: • Squids • Flashlight Fish • Pinecone Fish • Lantern fish a Flashlight Fish • Biasanya berukuran 0,0002 cm • Gram (-), Umumnya batang melengkung, motil dgn flagela • Secara alami menghasilkan cahaya. a Pinecone Fish a Lantern fish
  • 4. Where are they found? — Air laut — Saluran pencernaan ikan — Permukaan ikan yang membusuk — Hubungan simbiosis dengan hewan tertentu — Angler Fish, Bobtail Squid, Flashlight Fish Flashlight Fish, bakteri hidup di daerah berbentuk kacang di bawah mata. Angler Fish
  • 5. Bioluminescent Bacteria • Usually about .0002 cm • Typically curved rods, motile by flagella • Naturally produce their own light “Milky Sea” of bioluminescent bacteria
  • 6. Bioluminescent Bacteria-Squids • Bakteri hidup dalam organ cumi- cumi untuk memperoleh nutrisi berupa karbon dan asam amino, dan sebagai imbalannya mereka menyembunyikan siluet cumi- cumi ketika dilihat dari bawah dengan menyesuaikan jumlah cahaya yang mengenai bagian atas mantel. Bobtail Squids
  • 7. How do they do it? — Yang cukup menarik, cahaya hanya diproduksi ketika sel-sel pada kepadatan tinggi. — Cahaya diproduksi melalui reaksi kimia oksidatif. — Quorum Sensing: kemampuan bakteri untuk mengatur ekspresi gen dalam menanggapi kepadatan sel. Pada bakteri expresi gen bioluminescece dikontrol oleh operon yang disebut “Operon Lux”.