Cited by 570Probiotics and Fermented FoodsBacterial Genetics and BiotechnologyFermentation and Sensory Analysis

Lactic acid bacteria as starter cultures: An update in their metabolism and genetics

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Bintsis, Thomas, Department of Agricultural Technology, TEI of West Macedonia, 53100 Florina, Greece·2018·AIMS Microbiology

Abstract

Lactic acid bacteria (LAB) are members of an heterogenous group of bacteria which plays a significant role in a variety of fermentation processes. The general description of the bacteria included in the group is gram-positive, non-sporing, non-respiring cocci or rods. An overview of the genetics of lactococci, Streptococcus thermophilus, lactobacilli, pediococci, leuconostocs, enterococci and oenococciis presented with special reference to their metabolic traits. The three main pathways in which LAB are involved in the manufacture of fermented foods and the development of their flavour, are (a) glycolysis (fermentation of sugars), (b) lipolysis (degradation of fat) and (c) proteolysis (degradation of proteins). Although the major metabolic action is the production of lactic acid from the fermentation of carbohydrates, that is, the acidification of the food, LAB are involved in the production of many beneficial compounds such as organic acids, polyols, exopolysaccharides and antimicrobial compounds, and thus have a great number of applications in the food industry (i.e. starter cultures). With the advances in the genetics, molecular biology, physiology, and biochemistry and the reveal and publication of the complete genome sequence of a great number of LAB, new insights and applications for these bacteria have appeared and a variety of commercial starter, functional, bio-protective and probiotic cultures with desirable properties have marketed.

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Registry

Crossref · 10.3934/microbiol.2018.4.665

Cites

85 of 85 references verified0 citation errors · 0 not checkable

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  • LAB cause the rapid acidification of fermented milk via the production of organic acids, mainly lactic acid.

    “LAB cause the rapid acidification of fermented milk via the production of organic acids, mainly lactic acid [42,43].”

    From Lactic Acid Bacteria in Raw-Milk Cheeses: From Starter Cultures to Probiotic Functions (2022) · cites this paper as [43]

    The Introduction (page unavailable) identifies lactic-acid production as LAB’s main function and links it to food acidification, including in fermented dairy products. The Metabolism of LAB section (page unavailable) says lactate is the main product of lactose metabolism. The copy does not establish that acidification of fermented milk is rapid. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • Leuconostoc are immobile, do not form spores, and lack catalase and cytochromes.

    “Leuconostocci are immobile, do not form spores, and lack catalase and cytochromes [41,43,90,92].”

    From Lactic Acid Bacteria in Raw-Milk Cheeses: From Starter Cultures to Probiotic Functions (2022) · cites this paper as [43]

    The Genetics > Leuconostoc spp. section describes *Leuconostoc mesenteroides* cells as “asporogenous and non-motile,” supporting the spore and mobility claims for that species. Our copy does not state that leuconostocci lack catalase or cytochromes, and the species-specific passage does not establish those traits for the genus as a whole. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Leuconostoc are Gram-positive cocci with irregular morphology that may be elongate or elliptical.

    “Leuconostoc are characterized as Gram-positive cocci, with irregular morphology that may be elongate or elliptical.”

    From Lactic Acid Bacteria in Raw-Milk Cheeses: From Starter Cultures to Probiotic Functions (2022) · cites this paper as [43]

    The Genetics > Leuconostoc spp. section describes L. mesenteroides as Gram-positive cocci whose morphology can vary and become elongated under certain growth conditions. It does not describe elliptical cells or establish those features for Leuconostoc as a whole. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • Leuconostoc cell morphology varies with growth conditions: elongated in glucose or solid medium, ovoid in milk.

    “However, cell morphology can vary depending on growth conditions: When bacteria grow in a glucose medium or in a solid medium, they are elongated, whereas most strains form ovoid cells when they grow in milk [43,88,89].”

    From Lactic Acid Bacteria in Raw-Milk Cheeses: From Starter Cultures to Probiotic Functions (2022) · cites this paper as [43]

    The Genetics > Leuconostoc spp. section says morphology varies with growth conditions and that cells grown in glucose or on solid media may be elongated or rod-shaped. It describes most strains in liquid culture as cocci, but does not say that most strains form ovoid cells in milk. The citing sentence also states elongation more categorically than the source’s “may.” (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Leuconostoc are heterofermentative and produce D-lactate, ethanol, CO2, and small amounts of acetate from glucose metabolism via the phosphoketolase pathway.

    “They are heterofermentative and produce D-lactate, ethanol, CO2, and small amounts of acetate from glucose metabolism via the phosphoketolase pathway [41,43,66,90,93].”

    From Lactic Acid Bacteria in Raw-Milk Cheeses: From Starter Cultures to Probiotic Functions (2022) · cites this paper as [43]

    The Genetics > Leuconostoc spp. section says that, under micro-aerophilic conditions, L. mesenteroides heteroferments glucose to D-lactate, ethanol and CO2. Metabolism of LAB > Glucose metabolism identifies the phosphoketolase pathway in leuconostocs and says heterolactic fermentation can produce acetic acid, but it does not establish that Leuconostoc produces small amounts of acetate from glucose under the stated conditions. Page numbers are unavailable in our copy. (LLM, conf=0.87)

    Experimental — accuracy not yet measured

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Cites

Flagged first, then by citations

Research works printed but not linked: 14

  1. [4]Bintsis T Athanasoulas A Dairy starter cultures Papademas P Dairy Microbiology, A Practical Approach Boca Raton CRC Press 2015 114 154
  2. [7]Tamime AY Microbiology of starter cultures Robinson RK Dairy Microbiology Handbook 3 Eds. New York John Wiley & Sons Inc 2002 261 366
  3. [8]Parente E Cogan TM Starter cultures: General aspects Fox PF McSweeney PLH Cogan TM Cheese: Chemistry, Physics and Microbiology 4 Eds London Elsevier Academic Press 2004 23 147
  4. [12]Beresford T Cogan T Improving Cheddar cheese flavor Proceedings of the 5th Cheese Symposium Cork Teagasc/University College Cork 1997 53 61
  5. [13]Picon A Cheese Microbial Ecology and Safety Papademas P Bintsis T Global Cheesemaking Technology, Cheese Quality and Characteristics Chichester John Wiley & Sons Ltd 2018 71 99
  6. [16]Law BA Cheese ripening and cheese flavour technology Law BA Technology of Cheesemaking Sheffield Sheffield Academic Press Ltd 1999 163 192
  7. [18]Tamime AY Robinson RK Yoghurt Science and Technology 2 Eds. Cambridge Woodhead Publishing Ltd 1999
  8. [31]Upadhyay VK McSweeney PLH Magboul AAA Proteolysis in Cheese during Ripening Fox PF McSweeney PLH Cogan TM Cheese: Chemistry, Physics and Microbiology 4 Eds London Elsevier Academic Press 2004 391 433
  9. [32]Curtin AC McSweeney PLH Catabolism of Amino Acids in Cheese during Ripening Fox PF McSweeney PLH Cogan TM Cheese: Chemistry, Physics and Microbiology 4 Eds London Elsevier Academic Press 2004 435 454
  10. [38]Callanan MJ Ross RP Starter Cultures: Genetics Fox PF McSweeney PLH Cogan TM Cheese: Chemistry, Physics and Microbiology 4 Eds London Elsevier Academic Press 2004 149 161
  11. [42]NCBI Data collected from Genbank, 2018. Available from: https://www.ncbi.nlm.nih.gov/genome/browse/.
  12. [45]McKay LL Roles of plasmids in starter cultures Gilliland SE Bacterial Starter Cultures for Food Boca Raton CRC Press 1985 159 174
  13. [55]O'Sullivan DJ Methods for analysis of the intestinal microflora Tannock GW Probiotics: A critical review Norfolk Horizon Scientific Press 1999
  14. [94]Hols P Kleerebezem M Schranck AN Conversion of Lactococcus lactis from homolactic to homoalanine fermentation through metabolic engineering Nat Biotechnol 1999 17 588 592 10385325

Cited by

Sorted by citations

Authors
Bintsis, T., & Department of Agricultural Technology, T. O. W. M.
Venue
AIMS Microbiology
Published
2018
Volume
4
Issue
4
Pages
665-684
ISSN
2471-1888 (ISSN-L)
OpenAlex
W2904066077
Cited by
570
References
85
Citations by year
2026: 72 · 2025: 110 · 2024: 97 · 2023: 106 · 2022: 93 · 2021: 53 · 2020: 36 · 2019: 2
FWCI
2.31
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • AIMS Microbiology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Probiotics and Fermented Foods
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Fermentation and Sensory Analysis
Keywords
lactic acid bacteria, starter cultures, lactic acid fermentation, bacterial metabolism, bacterial genetics, Lactococcus, Streptococcus thermophilus, Lactobacillus, Pediococcus, Leuconostoc, Enterococcus, Oenococcus, glycolysis, lipolysis, proteolysis, fermented foods, flavour development, exopolysaccharides, antimicrobial agents, probiotics, genome sequencing

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