Green sulfur bacteria
Green sulfur bacteria
Green sulfur bacteria (Chlorobiaceae) are a family of obligate anaerobic, photosynthetic bacteria. Pronounced as /ɡriːn ˈsʌlfər bækˈtɪəriə/, the term originates from the green color of these bacteria due to the presence of chlorosomes, their main photosynthetic apparatus, and their sulfur metabolism.
Etymology
The term "green sulfur bacteria" is a direct translation of its scientific name Chlorobiaceae. The name Chlorobiaceae comes from the Greek words chloros meaning green, and bios meaning life, referring to their green color and their photosynthetic nature. The term "sulfur" refers to their unique sulfur metabolism.
Characteristics
Green sulfur bacteria are characterized by their green color due to the presence of chlorosomes, which are vesicles containing chlorophyll and other photosynthetic pigments. They are obligate anaerobes, meaning they can only survive in environments devoid of oxygen. They are also known for their unique sulfur metabolism, where they use hydrogen sulfide as an electron donor in photosynthesis, producing elemental sulfur as a byproduct.
Related Terms
- Chlorosomes: The main photosynthetic apparatus of green sulfur bacteria.
- Obligate anaerobes: Organisms that can only survive in environments devoid of oxygen.
- Photosynthetic bacteria: Bacteria that produce their own food through photosynthesis.
- Hydrogen sulfide: A compound used by green sulfur bacteria as an electron donor in photosynthesis.
External links
- Medical encyclopedia article on Green sulfur bacteria
- Wikipedia's article - Green sulfur bacteria
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