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. 1991 Feb;57(2):455–462. doi: 10.1128/aem.57.2.455-462.1991

Fermentation of Inulin by Clostridium thermosuccinogenes sp. nov., a Thermophilic Anaerobic Bacterium Isolated from Various Habitats

Wim J Drent 1,*, Greetje A Lahpor 1, Wim M Wiegant 1,†, Jan C Gottschal 1
PMCID: PMC182732  PMID: 16348411

Abstract

Four closely related strains of thermophilic bacteria were isolated via enrichment in batch and continuous culture with inulin as the sole source of carbon and energy by using inoculations from various sources. These new strains were isolated from beet pulp from a sugar refinery, soil around a Jerusalem artichoke, fresh cow manure, and mud from a tropical pond in a botanical garden. The cells of this novel species of strictly anaerobic, gram-positive bacteria were rod shaped and nonmotile. Growth on inulin was possible between 40 and 65°C, with optimum growth at 58°C. All strains were capable of fermenting a large number of sugars. Formate, acetate, ethanol, lactate, H2, and succinate were the main organic fermentation products after growth on fructose, glucose, or inulin. Synthesis of inulinase in batch culture closely paralleled growth, and the enzyme was almost completely cell bound. Strain IC is described as the type strain of a new species, Clostridium thermosuccinogenes sp. nov., with a G+C content of 35.9 mol%.

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Selected References

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