Effect of Dicarboxylic Acids and Aspergillus oryzae Fermentation Extract on Lactate Uptake by the Ruminal Bacterium Selenomonas ruminantium

The objective of this study was to determine the effects of l -aspartate, fumarate, l -malate, and an Aspergillus oryzae fermentation extract (Amaferm) on growth on lactate as well as lactate uptake by Selenomonas ruminantium HD4. Growth of S. ruminantium in medium that contained 2 g of dl -lactate per liter was stimulated approximately twofold by 10 mM l -aspartate, fumarate, or l -malate after 24 h. Both l -aspartate and fumarate increased...