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1990•FEMS Microbiology LettersOpen access

Nutrient limitation of two saccharolytic clostridia; secretion, sporulation, and solventogenesis

Robin A. Ross, John A. D’Elia, Robert Mooney, William R. Chesbro

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Abstract

Growth of the cellulolytic acidogen Clostridium strain C7 undergoing progressive nutrient limitation has been compared with that of the solventogen Clostridium beijerinckii. On the basis of cellulase secretion, differentiation of dissimilatory metabolism, and sporulation, different survival strategies by the two clostridia in progressive nutrient limitation can be discerned. In addition, the metabolic differentiation to butanol production in Clostridium beijerinckii can be specifically associated with the sporulation stage in which the forespore is enclosed by double membranes but not by a spore coat.

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Growth of the cellulolytic acidogen Clostridium strain C7 undergoing progressive nutrient limitation has been compared with that of the solventogen Clostridium beijerinckii. On the basis of cellulase secretion, differentiation of dissimilatory metabolism, and sporulation, different survival strategies by the two clostridia in progressive nutrient limitation can be discerned. In addition, the metabolic differentiation to butanol production in Clostridium beijerinckii can be specifically associated with the sporulation stage in which the forespore is enclosed by double membranes but not by a spore coat.

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Available abstract

Growth of the cellulolytic acidogen Clostridium strain C7 undergoing progressive nutrient limitation has been compared with that of the solventogen Clostridium beijerinckii. On the basis of cellulase secretion, differentiation of dissimilatory metabolism, and sporulation, different survival strategies by the two clostridia in progressive nutrient limitation can be discerned. In addition, the metabolic differentiation to butanol production in Clostridium beijerinckii can be specifically associated with the sporulation stage in which the forespore is enclosed by double membranes but not by a spore coat.

Key concepts: Clostridia, Clostridium beijerinckii, Clostridium, Microbiology, Spore, Biology, Cellulase, Clostridiaceae

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