Chapter 11d - The Nonproteobacteria Gram-Negative Bacteria...

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Unformatted text preview: The Nonproteobacteria Gram-Negative Bacteria G- bacteria that are not closely related to proteobacteria Includes several photosynthetic bacteria Both oxygenic and anoxygenic Taxonomy of photosynthetic bacteria Cyanobacteria, Chlorobi (green sulfur) and Chloroflexi (green non-sulfur) are phyla of gram- non-proteobacteria Purple sulfur bacteria are in the alpha proteobacteia class and purple non-sulfur bacteria are in the gamma proteobacteria class Cyanobacteria Blue-green algae Unicellular, filamentous or colonial Gliding motility or gas vacuoles Many species fix nitrogen heterocysts Adaptable to nutrient poor environments Fix nitrogen and CO 2 Oxygenic photosynthesis May be responsible for oxygenated atmosphere (CH 2 O) + H 2 O + O 2 light 2H 2 O + CO 2 Cyanobacteria Purple and green sulfur bacteria Anoxygenic photosynthesis produces sulfur rather than oxygen 2H 2 O + CO 2 light (CH 2 O) + H 2 O + O 2 2H 2 S + CO 2 light (CH 2 O) + H 2 O + 2S oxygenic anoxygenic...
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This note was uploaded on 02/21/2008 for the course BIOLOGY 380 taught by Professor Littlejohn during the Spring '06 term at University Of Southern Mississippi .

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Chapter 11d - The Nonproteobacteria Gram-Negative Bacteria...

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