Genus/species (aliases): Lactobacillus fermentum
Gram Stain: Positive
Cell: rod shaped
Liquid Growth: dispsersed
Survives well in the complex and harsh environment of the animal and human stomach and intestinal tract. Produces lysozyme, gas from glucose and NH3 from arginine.
It is the major heterofermentative Lactobacillus species of the human gut. Also found in fermenting plant and animal materials.
Catalase negative, non-spore forming, non-motile.
It is able to ferment ribose, galactose, D-glucose, D-fructose, D-mannose, aesculin, maltose, lactose, melibiose, saccharose, D-raffinose, D-tagatose and gluconate. Prolonged survival time in presence of high H2O2, scavenging of superoxide and hydroxyl radicals, antioxidant properties.
Role in wine:
- Acids: high tolerance
- Ethanol: high tolerance