تصفح Biological & Environmental Sciences حسب المؤلف "Zouari, Nabil"
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Antifungal activities of an endophytic Pseudomonas fluorescens strain Pf1TZ harbouring genes from pyoluteorin and phenazine clusters
Kilani-Feki, Olfa; Khiari, Oussama; Culioli, Gerald; Ortalo-Magne, Annick; Zouari, Nabil; Blache, Yves; Jaoua, Samir... more authors ... less authors ( Springer Netherlands , 2010 , Article)Pseudomonas fluorescens Pf1TZ was inhibitory in vitro to a number of phytopathogenic fungi and could protect vine plantlets against Botrytis cinerea. Total protection was reached after 3 weeks of bacterial inoculation. The ... -
Application of statistical experimental design for optimisation of bioinsecticides production by sporeless Bacillus thuringiensis strain on cheap medium
Ben Khedher, Saoussen; Jaoua, Samir; Zouari, Nabil ( Sociedade Brasileira de Microbiologia - SBM , 2014 , Article)In order to overproduce bioinsecticides production by a sporeless Bacillus thuringiensis strain, an optimal composition of a cheap medium was defined using a response surface methodology. In a first step, a Plackett-Burman ... -
Considering the Specific Impact of Harsh Conditions and Oil Weathering on Diversity, Adaptation, and Activity of Hydrocarbon-Degrading Bacteria in Strategies of Bioremediation of Harsh Oily-Polluted Soils
Al Disi, Zulfa; Jaoua, Samir; Al-Thani, Dhabia; Al-Meer, Saeed; Zouari, Nabil ( Hindawi Publishing Corporation , 2017 , Article)Weathering processes change properties and composition of spilled oil, representing the main reason of failure of bioaugmentation strategies. Our purpose was to investigate the metabolic adaptation of hydrocarbon-degrading ... -
Correlation between delta-endotoxin and proteolytic activities produced by Bacillus thuringiensis var. kurstaki growing in an economic production medium
Ennouri, Karim; Ben Khedher, Saoussen; Jaoua, Samir; Zouari, Nabil ( Taylor & Francis , 2013 , Article)Bacillus thuringiensis is a Gram positive bacterium that produces an insecticidal crystalline protein making it one of the most important biocontrol agents for pest management. Bioinsecticides based on B. thuringiensis ... -
Correlation between synthesis variation of 2-alkylquinolones and the antifungal activity of aBurkholderia cepacia strain collection
Kilani-Feki, Olfa; Zouari, Imen; Culioli, Gerald; Ortalo-Magne, Annick; Zouari, Nabil; Blache, Yves; Jaoua, Samir... more authors ... less authors ( Springer Netherlands , 2012 , Article)Twenty epiphytic and rhizospheric bacterial strains harbouring strong antifungal activities were isolated from the Tunisian environment. This group of bacteria was identified as Burkholderia cepacia genomovar I using 16S ... -
Environmental Burkholderia cepacia strain CS5 acting by two analogous alkyl-quinolones and a didecyl-phthalate against a broad spectrum of phytopathogens fungi
Kilani-Feki, Olfa; Culioli, Gerald; Ortalo-Magne, Annick; Zouari, Nabil; Blache, Yves; Jaoua, Samir... more authors ... less authors ( Springer-Verlag , 2011 , Article)An environmental Burkholderia cepacia strain named Cs5 was isolated and identified first using API biochemical identification system and then with 16S rDNA and recA sequence homology search. This bacterium exhibited a broad ... -
Evidence of a Role for Aerobic Bacteria in High Magnesium Carbonate Formation in the Evaporitic Environment of Dohat Faishakh Sabkha in Qatar
Al Disi, Zulfa; Jaoua, Samir; Bontognali, Tomaso R.R.; Attia, Essam S.M.; Al-Kuwari, Hamad A. Al Saad; Zouari, Nabil... more authors ... less authors ( Frontiers Media , 2017 , Article)Dolomite (MgCa(CO3)2) is an important petroleum reservoir rock mineral common in ancient sedimentary rocks which is infrequently found in modern environments. The mechanism of dolomite formation remains poorly understood, ... -
Improvement of Bacillus thuringiensis bioinsecticide production by sporeless and sporulating strains using response surface methodology
Ben Khedher, Saoussen; Kamoun, Amel; Jaoua, Samir; Zouari, Nabil ( Elsevier B.V. , 2011 , Article)Statistical experimental designs, involving a Plackett-Burman design followed by a rotatable central composite design were used to optimize the culture medium constituents for Bacillus thuringiensis bioinsecticide production. ... -
Improvement of Bioinsecticides Production by Sporeless Bacillus thuringiensis strains in Response to Various Stresses in Low Cost Medium
Ben Khedher, Saoussen; Jaoua, Samir; Zouari, Nabil ( Springer-Verlag , 2011 , Article)The use of bioinsecticides, particularly those produced by sporeless Bacillus thuringiensis strains, has been shown to be a good alternative in pest management. Two types of sporeless mutants were distinguished. The ... -
Improvement of Photorhabdus temperata bioinsecticides production in low-cost media through adequate fermentation technology
Jallouli, Wafa; Jaoua, Samir; Zouari, Nabil ( Wiley Subscription Services, Inc. , 2012 , Article)To develop a cost effective process for bioinsecticides production by Photorhabdus temperata, dissolved oxygen (DO) requirements were investigated in both the complex and the optimized media using diluted seawater as a ... -
Improvement of Photorhabdus temperata strain K122 bioinsecticide production by batch and fed-batch fermentations optimization
Jallouli, Wafa; Jaoua, Samir; Zouari, Nabil ( Springer-Verlag , 2012 , Article)Optimization of a fermentation process for bioinsecticides production by Photorhabdus temperata strain K122 was investigated into fully controlled 3-L fermenter using an optimized medium (OM). Development of large-scale ... -
Integration of a Recombinant Chitinase into Bacillus thuringiensis Parasporal Insecticidal Crystal
Driss, Fatma; Rouis, Souad; Azzouz, Hichem; Tounsi, Slim; Zouari, Nabil; Jaoua, Samir... more authors ... less authors ( Springer-Verlag , 2011 , Article)Chitinases have been successfully used in combination with Bacillus thuringiensis delta-endotoxins forming crystals in order to enhance their insecticidal activities. In this context, we opted for promoting the chitinase ... -
Involvement of oxidative stress and growth at high cell density in the viable but nonculturable state of Photorhabdus temperata ssp. temperata strain K122
Jallouli, Wafa; Zouari, Nabil; Jaoua, Samir ( Elsevier Ltd , 2010 , Article)Photorhabdus temperata ssp. temperata strain K122 represents a promising source of bioinsecticide. When cultured in an optimized medium, P. temperata exhibited restricted survival in terms of colony-forming ability on solid ... -
A MALDI-TOF study of bio-remediation in highly weathered oil contaminated soils
Al-Kaabi, Nasser; A. Al-Ghouti, Mohammad; Oualha, Meriam; Yousaf Mohammad, Mohammad; Al-Naemi, Aziza; I. Sølling, Theis; Al-Shamari, Noora; Zouari, Nabil... more authors ... less authors ( Elsevier , 2018 , Article)We have shown that Bacillus cereus is dominating the bacterial population at three polluted oil-industry sites where weather and soil conditions are extreme in terms of temperature, UV-radiation and salinity. A minor ... -
Overcome of carbon catabolite repression of bioinsecticides production by sporeless Bacillus thuringiensis through adequate fermentation technology
Khedher, Saoussen Ben; Jaoua, Samir; Zouari, Nabil ( Hindawi Publishing Corporation , 2014 , Article)The overcoming of catabolite repression, in bioinsecticides production by sporeless Bacillus thuringiensisstrain S22 was investigated into fully controlled 3 L fermenter, using glucose based medium. When applying adequate ... -
Overcoming the production limitations of Photorhabdus temperata ssp. temperata strain K122 bioinsecticides in low-cost medium
Jallouli, Wafa; Jaoua, Samir; Zouari, Nabil ( Springer-Verlag , 2011 , Article)For low-cost production of Photorhabdus temperata ssp. temperata strain K122 bioinsecticide, a cheap complex medium was optimized. Diluted seawater was used as the source of micronutrients, especially sodium chloride, ... -
Overproduction of Delta-Endotoxins by Sporeless Bacillusthuringiensis Mutants Obtained by Nitrous Acid Mutagenesis
Ben Khedher, Saoussen; Zouari, Nabil; Messaddeq, Nadia; Schultz, Patrick; Jaoua, Samir ( Springer-Verlag , 2011 , Article)Asporogenic and oligosporogenic Bacillus thuringiensis mutants having the ability to overproduce insecticidal crystal protein were generated by using nitrous acid (50 mg/ml), as chemical mutagenic agent. Insecticidal crystal ... -
Potential of Photorhabdus temperata K122 bioinsecticide in protecting wheat flour against Ephestia kuehniella
Jallouli, Wafa; Abdelkefi-Mesrati, Lobna; Tounsi, Slim; Jaoua, Samir; Zouari, Nabil ( Elsevier Ltd , 2013 , Article)The present study reports investigations on the insecticidal activity of the entomopathogenic bacterium Photorhabdus temperata K122 against the Mediterranean flour moth Ephestia kuehniella. Cultured in the optimized medium, ...