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Histopathological effects and determination of the putative receptor of Bacillus thuringiensis Cry1Da toxin in Spodoptera littoralis midgut

Dalel, BenFarhat-Touzri; Saadaoui, Marwa; Abdelkefi-Mesrati, Lobna; Saadaoui, Imen; Azzouz, Hichem; ... more authors ... less authors ( Elsevier , 2012 , Article)

Bacillus thuringiensis subsp. aizawai strain HD133, known by its effectiveness against Spodoptera species, produces many insecticidal proteins including Cry1Ab, Cry1Ca and Cry1Da. In the present study, the insecticidal ...

Study of the Bacillus thuringiensis Vip3Aa16 histopathological effects and determination of its putative binding proteins in the midgut of Spodoptera littoralis

Abdelkefi-Mesrati, Lobna; Boukedi, Hanen; Dammak-Karray, Mariam; Sellami-Boudawara, Tahya; Jaoua, Samir; ... more authors ... less authors ( Elsevier Inc. , 2011 , Article)

The bacterium Bacillus thuringiensis produces, at the vegetative stage of its growth, Vip3A proteins with activity against a broad spectrum of lepidopteran insects. The Egyptian cotton leaf worm (Spodoptera littoralis) is ...

Selection and characterisation of an HD1-like Bacillus thuringiensis isolate with a high insecticidal activity against Spodoptera littoralis (Lepidoptera: Noctuidae)

Azzouz, Hichem; Kebaili-Ghribi, Jihene; ben Farhat-Touzri, Dalel; Daoud, Fatma; Fakhfakh, Ines; ... more authors ... less authors ( John Wiley & Sons, Ltd , 2014 , Article)

Spodoptera littoralis (Boisduval) larvae are known by their susceptibility to Bacillus thuringiensis subsp. aizawai strains. In order to prevent the appearance of B. thuringiensis (Bt) resistance and to develop economical ...

Construction of a Bacillus thuringiensis genetically-engineered strain harbouring the secreted Cry1Ia delta-endotoxin in its crystal

Dammak, Mariam; Jaoua, Samir; Tounsi, Slim ( Springer Netherlands , 2011 , Article)

Unlike other Bacillus thuringiensis Cry proteins, Cry1 Ia does not form a crystal since it is a secreted delta-endotoxin. We have engineered a Cry1 Iac chimeric protein by substituting the C-terminal part of Cry1 Ia by the ...

Susceptibility of Agrotis segetum (noctuidae) to Bacillus thuringiensis and analysis of midgut proteinases

Ben Hamadou-Charfi, Dorra; Sauer, Annette Juliane; Abdelkefi-Mesrati, Lobna; Tounsi, Slim; Jaoua, Samir; ... more authors ... less authors ( Taylor & Francis , 2015 , Article)

Seventy-eight Bacillus thuringiensis isolates were selected for a screening against the Lepidoptera species Agrotis segetum to search the higher insecticidal activity. In a preliminary bioassay, the spore-crystal mixture ...

Agrotis segetum midgut putative receptor of Bacillus thuringiensis vegetative insecticidal protein Vip3Aa16 differs from that of Cry1Ac toxin

Ben Hamadou-Charfi, Dorra; Boukedi, Hanen; Abdelkefi-Mesrati, Lobna; Tounsi, Slim; Jaoua, Samir ( Elsevier Inc. , 2013 , Article)

Considering the fact that Agrotis segetum is one of the most pathogenic insects to vegetables and cereals in the world, particularly in Africa, the mode of action of Vip3Aa16 of Bacillus thuringiensis BUPM95 and Cry1Ac of ...

Amino acids Y229 and F603 are involved in Bacillus thuringiensis Cry1Ac delta-endotoxin stability and toxicity

Dammak, Mariam; Ali, Mamdouh Ben; Jaoua, Samir; Tounsi, Slim ( Blackwell Publishing , 2012 , Article)

Bacillus thuringiensis Cry1Ac toxin shares structurally five conserved blocs with the other δ-endotoxins. To study the role of some amino acids belonging to these regions, two mutations, Y(229) P and F(603) S, were introduced ...

Comparative study of Bacillus thuringiensis Cry1Ia and Cry1Aa delta-endotoxins : activation process and toxicity against Prays oleae

Dammak, Mariam; Tounsi, Slim; Rousis, Souad; Jaoua, Samir ( Elsevier Inc. , 2010 , Article)

Cry1Ia and Cry1Aa proteins exhibited toxicities against Prays oleae with LC(50) of 189 and 116 ng/cm(2), respectively. The ability to process Cry1Ia11 protoxin by trypsin, chymotrypsin and P. oleae larvae proteases was ...

Characterisation of novel Bacillus thuringiensis isolates against Aedes aegypti (Diptera: Culicidae) and Ceratitis capitata (Diptera:Tephridae)

Elleuch, Jihen; Tounsi, Slim; Ben Hassen, Najeh Belguith; Lacoix, Marie Noel; Chandre, Fabrice; ... more authors ... less authors ( Elsevier Inc. , 2015 , Article)

Bacillus thuringiensis is successfully used in pest management strategies as an eco-friendly bioinsecticide. Isolation and identification of new strains with a wide variety of target pests is an ever growing field. In this ...

Vegetative insecticidal protein of Bacillus thuringiensis BLB459 and its efficiency against Lepidoptera

Boukedi, Hanen; Khedher, Saoussen Ben; Hadhri, Rania; Jaoua, Samir; Tounsi, Slim; ... more authors ... less authors ( Elsevier Ltd , 2017 , Article)

Bacillus thuringiensis strain BLB459 supernatant showed a promising activity against Lepidopteran pests with extremely damages in the larvae midgut. Investigations of the genes that encode secreted toxin demonstrated that ...