purple bacteria

purple bacteria
a group of Gram-negative pink to purplish-brown bacteria, comprising the purple sulfur bacteria and purple nonsulfur bacteria, that occur in anaerobic aquatic environments and carry out a unique form of photosynthesis without oxygen, using the pigment bacteriochlorophyll.
[1895-1900]

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Universalium. 2010.

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  • purple bacteria — noun free living Gram negative pink to purplish brown bacteria containing bacteriochlorophyll • Hypernyms: ↑phototrophic bacteria, ↑phototropic bacteria * * * a group of Gram negative pink to purplish brown bacteria, comprising the purple sulfur… …   Useful english dictionary

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  • photosynthetic bacteria — Bacteria that are able to carry out photosynthesis. Light is absorbed by bacteriochlorophyll and carotenoids. Two principal classes are the green bacteria and the purple bacteria …   Dictionary of molecular biology

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