title: Sensorically and antimicrobially active metabolite production of Lactobacillus strains on Jerusalem artichoke juice.
abstract: BACKGROUND
  In the tubers of Jerusalem artichoke (Helianthus tuberosus L.) the main carbohydrate is the well-known prebiotic inulin, which is a good growth substrate for gut microorganisms. Jerusalem artichoke tuber is traditionally consumed boiled or pickled rather than in fermented form. Lactic acid bacteria are traditionally used in the production of fermented foods; nevertheless their behavior and metabolite production are considerably influenced by the substrate. The purpose of this study was to investigate the growth and production of the most important sensorically and antimicrobially active metabolites of different Lactobacillus strains on Jerusalem artichoke juice.
  
  
  RESULTS
  All investigated strains grew well (in the range 10(9) cfu mL(-1) ) in the media. The organic acids (lactic acid, 110-337 mmol L(-1) ; acetic acid, 0-180 mmol L(-1) ; and succinic acid, 0-79 mmol L(-1) ), hydrogen peroxide (0.25-1.77 mg L(-1) ), mannitol (0.06-3.24 g L(-1) ), acetoin and diacetyl production of strains varies not only according to the species but also from strain to strain, which will be demonstrated and discussed in the paper.
  
  
  CONCLUSIONS
  Our results showed that lactobacilli can be used for the fermentation of Jerusalem artichoke, which in this form could be used, alone or mixed with other raw food material, as a new synbiotic functional food.
authors.affiliation: Central Food Research Institute, Unit of Biology, Herman Ottó u. 15., H-1022, Budapest, Hungary. zs.zalan@cfri.hu
authors.forename: Zsolt
authors.initials: Z
authors.lastname: Zalán
authors.forename: Jaroslav
authors.initials: J
authors.lastname: Hudáček
authors.forename: Marianna
authors.initials: M
authors.lastname: Tóth-Markus
authors.forename: Eva
authors.initials: E
authors.lastname: Husová
authors.forename: Kateřina
authors.initials: K
authors.lastname: Solichová
authors.forename: Ferenc
authors.initials: F
authors.lastname: Hegyi
authors.forename: Milada
authors.initials: M
authors.lastname: Plocková
authors.forename: Jana
authors.initials: J
authors.lastname: Chumchalová
authors.forename: Anna
authors.initials: A
authors.lastname: Halász
mesh_terms: D000093:Acetoin / Q000378:metabolism; D000143:Acids / Q000378:metabolism; D000890:Anti-Infective Agents / Q000494:pharmacology; D003931:Diacetyl / Q000378:metabolism; D005285:Fermentation; D005516:Food Microbiology; D006368:Helianthus / Q000737:chemistry / Q000378:metabolism* / Q000382:microbiology; D006861:Hydrogen Peroxide / Q000378:metabolism; D007444:Inulin / Q000494:pharmacology; D007778:Lactobacillus / Q000254:growth & development / Q000378:metabolism*; D008353:Mannitol / Q000378:metabolism; D028321:Plant Preparations / Q000378:metabolism* / Q000494:pharmacology; D035281:Plant Tubers / Q000737:chemistry / Q000382:microbiology*; D013045:Species Specificity; D058616:Synbiotics
chemical_list: D000143:Acids; D000890:Anti-Infective Agents; D028321:Plant Preparations; D008353:Mannitol; D007444:Inulin; D006861:Hydrogen Peroxide; D000093:Acetoin; D003931:Diacetyl