caa a22 4500 475745663 CHVBK 20180406123512.0 cr unu---uuuuu 170329e20000601xx s 000 0 eng 10.1007/s002840010074 doi (NATIONALLICENCE)springer-10.1007/s002840010074 Effects of Ammonia and Amino Acids on the Growth and Proteolytic Activity of Three Species of Rumen Bacteria: Prevotella albensis , Butyrivibrio fibrisolvens , and Streptococcus bovis [Elektronische Daten] [Muriel Sales, François Lucas, Gérard Blanchart] Abstract.: The addition of increasing physiological concentrations of ammonia or amino acids had distinct effects on the growth and proteolytic activity of Streptococcus bovis JB1, Prevotella albensis, and Butyrivibrio fibrisolvens DSM3071. The growth of S. bovis and B. fibrisolvens was enhanced by NH3 and AA, and that of P. albensis was reduced compared with a control with protein as the sole source of nitrogen. The proteolytic activity of S. bovis and P. albensis was reduced, but that of B. fibrisolvens was improved. NH3 seemed to act mainly on the cell-associated fraction of the proteolytic activity, while the action of AA was not specific. In the rumen the proteolytic activity of S. bovis and P. albensis would be optimal at low concentrations of NH3 or AA (<0.05 and <0.27 g/L respectively). In contrast, B. fibrisolvens would need higher concentrations (0.5 g/L of NH3 or 2.7 g/L of AA). It can be assumed that these bacteria will grow in different ecological niches. Springer-Verlag New York Inc., 2000 Sales Muriel INPL-INRA-UHP Nancy I, Laboratoire de Sciences Animales de l'ENSAIA, 2 avenue de la forêt de Haye, BP 172 54505 Vandoeuvre-les-Nancy cedex, France, FR aut Lucas François INPL-INRA-UHP Nancy I, Laboratoire de Sciences Animales de l'ENSAIA, 2 avenue de la forêt de Haye, BP 172 54505 Vandoeuvre-les-Nancy cedex, France, FR aut Blanchart Gérard INPL-INRA-UHP Nancy I, Laboratoire de Sciences Animales de l'ENSAIA, 2 avenue de la forêt de Haye, BP 172 54505 Vandoeuvre-les-Nancy cedex, France, FR aut https://doi.org/10.1007/s002840010074 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s002840010074 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sales Muriel INPL-INRA-UHP Nancy I, Laboratoire de Sciences Animales de l'ENSAIA, 2 avenue de la forêt de Haye, BP 172 54505 Vandoeuvre-les-Nancy cedex, France, FR aut NATIONALLICENCE 700 1- Lucas François INPL-INRA-UHP Nancy I, Laboratoire de Sciences Animales de l'ENSAIA, 2 avenue de la forêt de Haye, BP 172 54505 Vandoeuvre-les-Nancy cedex, France, FR aut NATIONALLICENCE 700 1- Blanchart Gérard INPL-INRA-UHP Nancy I, Laboratoire de Sciences Animales de l'ENSAIA, 2 avenue de la forêt de Haye, BP 172 54505 Vandoeuvre-les-Nancy cedex, France, FR aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer