Cited by 66Probiotics and Fermented FoodsMycotoxins in Agriculture and FoodPlant-Microbe Interactions and Immunity

Probiotic and antifungal attributes of Levilactobacillus brevis MYSN105, isolated from an Indian traditional fermented food Pozha

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Somashekaraiah, Rakesh, Mottawea, Walid, Gunduraj, Adithi, Joshi, Udit, Hammami, Riadh, Sreenivasa, M. Y.·2021·Frontiers in Microbiology

Abstract

The use of probiotics and antifungal capabilities of the lactic acid bacteria (LAB) isolated from different niches is a strategy to prepare functional cultures and biopreservatives for food/feed industries. In the present study, LAB strains isolated from an Indian traditional fermented food, Pozha, were evaluated for their probiotic properties and biocontrol potential. A total of 20 LAB isolates were selected from Pozha samples collected aseptically and screened for their antagonistic activity against Fusarium verticillioides. Among the bioactive isolates, Lacticaseibacillus brevis MYSN105 showed the highest antifungal activity in vitro, causing some morphological alterations such as damaged mycelia and deformed conidia. Cell-free supernatant (CFS) from L. brevis MYSN105 at 16% concentration effectively reduced the mycelial biomass to 0.369 g compared to 1.938 g in control. Likewise, the conidial germination was inhibited to 20.12%, and the seed treatment using CFS induced a reduction of spore count to 4.1 × 106 spores/ml compared to 1.1 × 109 spores/ml for untreated seeds. The internal transcribed spacer (ITS) copy number of F. verticillioides decreased to 5.73 × 107 and 9.026 × 107 by L. brevis MYSN105 and CFS treatment, respectively, compared to 8.94 × 1010 in control. The L. brevis MYSN105 showed high tolerance to in vitro gastrointestinal conditions and exhibited high adhesive abilities to intestinal epithelial cell lines. The comparative genome analysis demonstrated specific secondary metabolite region coding for bacteriocin and T3PKS (type III polyketide synthase) possibly related to survival and antimicrobial activity in the gut environment. Our results suggest that L. brevis MYSN105 has promising probiotic features and could be potentially used for developing biological control formulations to minimize F. verticillioides contamination and improve food safety measures.

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Research works printed but not linked: 2

  1. Deepa N. Sreenivasa M. (2017). Fusarium verticillioides, a Globally Important Pathogen of Agriculture and Livestock: A Review. J. Vet. Med. Res. 4: 1084.
  2. EFSA (2012). European Food Safety Authority, EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP). Scientific opinion Guidance on the assessment of bacterial susceptibility to antimicrobials of human and veterinary importance. EFSA J. 10: 2740. 10.2903/j.efsa.20YY.NNNN.Available · DOI

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Authors
Somashekaraiah, R., Mottawea, W., Gunduraj, A., Joshi, U., Hammami, R., & Sreenivasa, M. Y.
Affiliations
  • University of Mysore (IN)
  • University of Ottawa (CA)
Corresponding author
Sreenivasa, M. Y.
Venue
Frontiers in Microbiology
Published
2021-07-05
Volume
12
Pages
696267-696267
ISSN
1664-302X (ISSN-L)
OpenAlex
W3178383176
Cited by
66
References
86
Citations by year
2026: 11 · 2025: 12 · 2024: 18 · 2023: 18 · 2022: 5 · 2021: 2
FWCI
6.42
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Microbiology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • Greater South Information System
Funders
  • Shastri Indo-Canadian Institute
  • University of Ottawa
  • Indian Council of Medical Research (3/1/2)
  • Science and Engineering Research Board
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Probiotics and Fermented Foods
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Mycotoxins in Agriculture and Food
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant-Microbe Interactions and Immunity
Keywords
probiotics, antifungal activity, Fusarium verticillioides, traditional fermented foods, biological control, cell-free supernatant, seed treatment, mycelial biomass, conidial germination, gastrointestinal tolerance, bacteriocins, type III polyketide synthase, secondary metabolites, food safety

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