释义 |
WordReference Random House Unabridged Dictionary of American English © 2024pur′ple bacte′ria, - Microbiologya 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.
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