| azotobacter | A genus of gram-negative, aerobic bacteria found in soil and water. Its organisms occur singly, in pairs or irregular clumps, and sometimes in chains of varying lengths. (12 Dec 1998) |
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| azotobacter vinelandii | A species of gram-negative, aerobic bacteria first isolated from vineland, new jersey. Ammonium and nitrate are used as nitrogen sources by this bacterium. (12 Dec 1998) |
| azotobacteraceae | A family of motile, gram-negative bacteria found in soil and water and capable of fixing atmospheric nitrogen. (12 Dec 1998) |
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