A5059334834- Probiotics and Fermented Foods
- Reproductive System and Pregnancy
- Plant-Microbe Interactions and Immunity
- Microbial Community Ecology and Physiology
- Genomics and Phylogenetic Studies
- Endometriosis Research and Treatment
- Antibiotic Resistance in Bacteria
- Microbial Metabolites in Food Biotechnology
- Legume Nitrogen Fixing Symbiosis
- Mycorrhizal Fungi and Plant Interactions
- Bacterial biofilms and quorum sensing
- Enzyme Production and Characterization
- Salmonella and Campylobacter epidemiology
- Identification and Quantification in Food
- Protein Hydrolysis and Bioactive Peptides
- Gut microbiota and health
- Hepatitis B Virus Studies
- Wastewater Treatment and Reuse
- Microbial bioremediation and biosurfactants
- Plant Pathogens and Fungal Diseases
- Chromium effects and bioremediation
- Microbial Natural Products and Biosynthesis
- Polyamine Metabolism and Applications
- Essential Oils and Antimicrobial Activity
- Plant Pathogenic Bacteria Studies
Tunis El Manar University
2016-2025
Tunis University
2016-2025
Laboratoire des Biomolécules
2011-2020
Research and Technology Center of Energy
2008-2009
Centre de Recherches et des Technologies des Eaux
2008-2009
Institut de l'Information Scientifique et Technique
2007
University of Milan
2002
Oases are desert-farming agro-ecosystems, where date palm (Phoenix dactylifera L.) plays a keystone role in offsetting the effects of drought and maintaining suitable microclimate for agriculture. At present, abundance, diversity plant growth promotion (PGP) root-associated bacteria remain unknown. Considering environmental pressure determined by water scarcity desert environments, we hypothesized that associated with roots improve resistance to drought. Here, ecology root endophytes from...
The association between plant and growth promoting bacteria (PGPB) contributes to the successful thriving of plants in extreme environments featured by water shortage. We have recently shown that, with respect non-cultivated desert soil, rhizosphere pepper cultivated under farming hosts PGPB communities that are endowed a large portfolio PGP traits. Pepper exposed bacterial isolates from exhibited higher tolerance shortage, compared untreated control. This promotion was mediated larger root...
The emergence of antibiotics-resistant bacteria has been a serious concern for medical professionals over the last decade. Therefore, developing new and effective antimicrobials with modified or different modes action is continuing imperative. In this context, our study focuses on evaluating antimicrobial activity chemically synthesized flavonoids (FLAV) to guide chemical synthesis molecules. A set 12 molecules (4 chalcones, 4 flavones flavanones), bearing substitutions chlorine bromine...
Detection and identification of new antagonistic activities towards Bacillus cereus relatives.Twenty thuringiensis strains were screened for their capacity to express bacteriocin-like agents. Strain BMG1.7, isolated from soil, showed an activity called thuricin 7. Thuricin 7 was active against several species the genus Bacillus, including three four known B. thuringiensis/B. bacteriocin producers, as well Streptococcus pyogenes Listeria monocytogenes strains. Antimicrobial lost after...
A total of 119 lactic acid bacteria (LAB) were isolated, by culture-dependant method, from rhizosphere samples olive trees and desert truffles evaluated for different biotechnological properties. Using the variability intergenic spacer 16S-23S 16S rRNA gene sequences, isolates identified as genera Lactococcus, Pediococcus, Lactobacillus, Weissella, Enterococcus . All strains showed proteolytic activity with variable rates 42% EPS producers, while only 10% ability to grow in 9% NaCl. In...
In arid ecosystems environmental factors such as geoclimatic conditions and agricultural practices are of major importance in shaping the diversity functionality plant-associated bacterial communities. Assessing influence is a key to understand (i) driving forces determining shape root-associated communities (ii) plant growth promoting (PGP) services they provide. Desert oasis environment was chosen model ecosystem where agriculture possible by microclimate determined date palm cultivation....
The textile wastewaters (TWWs) are one of the major sources environmental pollution, due to presence various recalcitrant dyes.It is estimated that about 300,000 t synthetic dyes discharged in TWWs every year worldwide.Thus, untreated or incompletely treated cause harm aquatic and terrestrial life.To avoid negative impacts associated discharge into natural ecosystems, effective dye remediation processes being developed.Current methods removing from generally regarded be complex, expensive...
Milk and dairy products harbor a wide variety of bacterial species that compete for both limited resources space. Under these competitive conditions, bacteria develop specialized mechanisms to protect themselves during niche colonization nutrient acquisition processes. The antagonism include the production antimicrobial agents or molecules facilitate competitor dispersal. In present work, strain designated RC6 was isolated from Ricotta identified as Bacillus cereus. It generates peptide...
Streptomyces is the most frequently described genus of Actinomycetes, a producer biologically active secondary metabolites. Indeed, species produces about 70% antibiotics and 60% antifungal molecules used in agriculture. Our study was carried out with goal isolating identifying antimicrobial metabolites from misionensis V16R3Y1 isolated date palm rhizosphere (southern Tunisia). This strain presented broad range activity against Fusarium oxysporum, Aspergillus flavus, Penicillium expansum,...
The bacterial genus Pantoea has been widely evaluated as promising bacteria to increase phosphorus (P) availability in soil. aim of this study was characterize the phosphate solubilizing (PS) activity a agglomerans strain and evaluate impact its application semi-arid soil on structure communities whole. An incubation experiment under close-to-natural environmental conditions conducted for 15 days at 30 °C. High-throughput sequencing 16S rRNA gene used compare community P....
Abstract Weissella strains have been reported to be useful in biotechnological and probiotic determinations, some of them are considered opportunistic pathogens. Given the widespread interest about antimicrobial susceptibilities, transmission resistances, virulence factors, there is little research available on such topics for . The aim this study was assess safety aspects potential 54 spp. from different environmental sources. Antibiotic susceptibility, hemolytic activity, horizontal...
ABSTRACT Mung bean nuclease treatment of 16S-23S ribosomal DNA intergenic transcribed spacers (ITS) amplified from several strains the six species Bacillus cereus group showed that B. anthracis Davis TE702 and mycoides G2 have other intermediate fragments in addition to 220- 550-bp homoduplex typical group. Long ITS another 19 were sequenced. Two main types found, either with two tRNA genes (tRNA Ile Ala ) or without any at all. Strain harbors an additional a single gene, hybrid between...
Many pentachlorophenol- (PCP-) contaminated environments are characterized by low or elevated temperatures, acidic alkaline pH, and high salt concentrations. PCP-degrading microorganisms, adapted to grow prosper in these environments, play an important role the biological treatment of polluted extreme habitats. A bacterium was isolated from arid saline soil southern Tunisia enriched mineral salts medium supplemented with PCP as source carbon energy. Based on 16S rRNA coding gene sequence...
Abstract For decades, lactic acid bacteria has been isolated and selected to be used as starter cultures in meat fermentation for standardization management of quality dry‐fermented sausage which constitute a considerable challenge. The aim this study was evaluate the effect Lactobacillus sakei strains, from different origins, on qualities sausages. These last, manufactured with combinations ( L. + Staphylococcus xylosus ), were ripened, using same raw materials conditions, 45 days. Samples...