Stimulation of lactobacilli by an aqueous extract of the green alga Scenedesmus acutus 276-3a
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- Zielke, H., Kneifel, H., Webb, L.E. et al. European J. Appl. Microbiol. Biotechnol. (1978) 6: 79. doi:10.1007/BF00500858
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The hot-water extract of Scenedesmus acutus 276-3a enhances acid formation by Lactobacillus casei var. sbirota, Streptococcus lactis and Streptococcus thermophilus appreciably. At least in S. lactis the stimulation is not caused by mineral constituents such as Mn2+. In order to facilitate screening, a quick test in tubes was used. Stimulation of lactobacilli by algal extract is also demonstrated in tests on agar plates containing TTC. Bioautography of algal extract fractions on TTC plates enabled adenine and hypoxanthine to be identified as growth factors in algal extract which contributed towards the stimulation of S. lactis.