Omar Assobhei , Abdellah El Kanouni , Mohammed Ismaili , Mohammed Loutfi , Henri Petitdemange
{"title":"乙酸和丁酸对醋酸丁酸梭菌ATCC 824反复传代培养过程中溶剂稳定性和孢子形成的影响","authors":"Omar Assobhei , Abdellah El Kanouni , Mohammed Ismaili , Mohammed Loutfi , Henri Petitdemange","doi":"10.1016/S0922-338X(97)86769-4","DOIUrl":null,"url":null,"abstract":"<div><p>We studied the effect of serial transfers on solventogenesis capacity and spore-forming ability by <em>Clostridium acetobutylicum</em> ATCC 824 in two culture media. In reinforced clostridial medium (RCM), an abrupt decrease of the ability to ferment glucose and produce solvent occurred after the 10th to 12th transfer and spore formation failed after the 25th transfer. When 1.5 g/l of acetic and butyric acids were added to the RCM, however, the capacity to produce a normal level of solvents was not lost, whereas spore-forming ability was lost after the 23rd transfer. The shift from solventogenesis to acidogenesis did not occur in chemically defined medium (CDM) even by the 40th transfer. The dramatic decrease of solventogenesis in the degenerate culture was coupled with acetate/butyrate CoA transferase and acetoacetate decarboxylase deficient activities.</p></div>","PeriodicalId":15696,"journal":{"name":"Journal of Fermentation and Bioengineering","volume":"85 2","pages":"Pages 209-212"},"PeriodicalIF":0.0000,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0922-338X(97)86769-4","citationCount":"28","resultStr":"{\"title\":\"Effect of acetic and butyric acids on the stability of solvent and spore formation by Clostridium acetobutylicum ATCC 824 during repeated subculturing\",\"authors\":\"Omar Assobhei , Abdellah El Kanouni , Mohammed Ismaili , Mohammed Loutfi , Henri Petitdemange\",\"doi\":\"10.1016/S0922-338X(97)86769-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>We studied the effect of serial transfers on solventogenesis capacity and spore-forming ability by <em>Clostridium acetobutylicum</em> ATCC 824 in two culture media. In reinforced clostridial medium (RCM), an abrupt decrease of the ability to ferment glucose and produce solvent occurred after the 10th to 12th transfer and spore formation failed after the 25th transfer. When 1.5 g/l of acetic and butyric acids were added to the RCM, however, the capacity to produce a normal level of solvents was not lost, whereas spore-forming ability was lost after the 23rd transfer. The shift from solventogenesis to acidogenesis did not occur in chemically defined medium (CDM) even by the 40th transfer. The dramatic decrease of solventogenesis in the degenerate culture was coupled with acetate/butyrate CoA transferase and acetoacetate decarboxylase deficient activities.</p></div>\",\"PeriodicalId\":15696,\"journal\":{\"name\":\"Journal of Fermentation and Bioengineering\",\"volume\":\"85 2\",\"pages\":\"Pages 209-212\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1998-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/S0922-338X(97)86769-4\",\"citationCount\":\"28\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Fermentation and Bioengineering\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0922338X97867694\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Fermentation and Bioengineering","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0922338X97867694","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Effect of acetic and butyric acids on the stability of solvent and spore formation by Clostridium acetobutylicum ATCC 824 during repeated subculturing
We studied the effect of serial transfers on solventogenesis capacity and spore-forming ability by Clostridium acetobutylicum ATCC 824 in two culture media. In reinforced clostridial medium (RCM), an abrupt decrease of the ability to ferment glucose and produce solvent occurred after the 10th to 12th transfer and spore formation failed after the 25th transfer. When 1.5 g/l of acetic and butyric acids were added to the RCM, however, the capacity to produce a normal level of solvents was not lost, whereas spore-forming ability was lost after the 23rd transfer. The shift from solventogenesis to acidogenesis did not occur in chemically defined medium (CDM) even by the 40th transfer. The dramatic decrease of solventogenesis in the degenerate culture was coupled with acetate/butyrate CoA transferase and acetoacetate decarboxylase deficient activities.