Abstract
Enrichments on L-tartrate from a freshwater lake sediment yielded a pure culture of anaerobic bacterium designated strain 16Lt1. The rod-shaped organism was motile, did not form spores, and had a gram-negative wall structure. No cytochromes were detected. The mol % G+C of the DNA was 58. The new strain was microaerotolerant, and grew optimally at 30°C and neutral pH in freshwater medium. A wide range of carbohydrates was fermented, with formate, acetate, ethanol, lactate and succinate being the end-products detected. L-tartrate and citrate were fermented to formate, acetate and CO2. L-tartrate was fermented by the dehydratase pathway, and glucose by the Embden-Meyerhof-Parnas pathway. Fumarate was reduced, but nitrate, sulfate, sulfur and thiosulfate were not used as terminal electron acceptors. Glucose metabolism was constitutive, whereas L-tartrate-degrading activity was inducible. When glucose and L-tartrate were both present as substrates, growth was diauxic with glucose being metabolized first. The growth rate and growth yield were higher on glucose than on L-tartrate. Strain 16Lt1 has been deposited with the Deutsche Sammlung von Mikroorganismen as ‘Bacteroides’ sp. DSM6268.
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Janssen, P.H. Fermentation of L-tartrate by a newly isolated gram-negative glycolytic bacterium. Antonie van Leeuwenhoek 59, 191–198 (1991). https://doi.org/10.1007/BF00580659
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DOI: https://doi.org/10.1007/BF00580659