eISSN: 2353-9461
ISSN: 0860-7796
BioTechnologia
Current issue Archive About the journal Editorial board Abstracting and indexing Subscription Contact Instructions for authors Publication charge Ethical standards and procedures
Editorial System
Submit your Manuscript
SCImago Journal & Country Rank
Newsletter
Enter your email:
 
Search
Editorial Policies
Sarajevo Declaration on Integrity and Visibility of Scholarly Publications

Without publication fees

without publication fees

Open access

without publication fees

Journal integrated with

integrated with publons
2/2020
vol. 101
 
Share:
Send email
Share:
abstract:
RESEARCH PAPERS

Ultrasound conditioning of Streptococcus thermophilus CNRZ 447: growth, biofilm formation, exopolysaccharide production, and cell membrane permeability

Hafidha Khadem
1, 2
,
Aicha Meddah Tirtouil
1
,
Moustapha Soungalo Drabo
3
,
Badra Boubakeur
1, 2

  1. A Bioconversion Laboratory, Microbiology Engineering and Health Safety, Faculty of Nature and Life Sciences, University Mustapha Stambouli of Mascara, Algeria
  2. Ibn Khaldoun University, Tiaret, Algeria
  3. University Joseph Ki-Zerbo, Ouagadougou, Burkina Faso
BioTechnologia vol. 101 (2) C pp. 159–165
DOI: https://doi.org/10.5114/bta.2020.94774
Online publish date: 2020/06/16
View full text Get citation
 
PlumX metrics:
Sonication is one of the new and innovative approaches that is being increasingly used in food industry to control fermentation processes and to eradicate spoiling. Recently, this approach has seen new industrial applications such as enhancing microbial productivity. The present study aimed to assess the effects of ultrasound conditioning on the metabolism and extracellular matrix production of Streptococcus thermophilus. Bacterial suspensions were treated in ultrasonic bath (35 kHz, 240/60 W peak/nominal power, 1.8 l capacity) for different time periods (5, 10, 15, 20, 30, 45, and 65 min), and the growth improvement, adhesion ability, biofilm formation, and exopolysaccharide production of the bacterial strain were measured. The bacterial strain exhibited resistance to the treatment, and the conditioning improved the growth, adhesion, membrane permeability, biofilm formation, and exopolysaccharide production ability. An optimal treatment was obtained for 30 minutes of conditioning. An excellent yield of desirable exopolysaccharides (1788 mg glucose equivalent/l) was achieved. Ultrasound conditioning may be used as a potential approach to enhance certain biotechnological properties of industrial microorganisms.
keywords:

Streptococcus thermophilus, ultrasound conditioning, bacterial adhesion, biofilm, exopolysaccharides


Stosujemy się do standardu HONcode dla wiarygodnej informacji zdrowotnej This site complies with the HONcode standard for trustworthy health information: verify here
Hosted by Termedia sp. z o.o.