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Détail de l'auteur
Auteur S.N Sylla
Documents disponibles écrits par cet auteur
Affiner la rechercheEcological Engineering, Vo128. ). Impact of mycorrhiza-based inoculation strategies on Ziziphus mauritiana Lam. and its native mycorrhizal communities on the route of the Great Green Wall (Senegal / B Thioye
Ecological Engineering, Vo128. ). Impact of mycorrhiza-based inoculation strategies on Ziziphus mauritiana Lam. and its native mycorrhizal communities on the route of the Great Green Wall (Senegal [texte imprimé] / B Thioye, Auteur ; H Sanguin, Auteur ; A. Kane, Auteur ; S.M de Faria, Auteur ; D Fall, Auteur ; Y Prin, Auteur ; Diaminatou Sanogo, Auteur ; C. Ndiaye, Auteur ; R Duponnois, Auteur ; S.N Sylla, Auteur ; Bâ A.M., Auteur . - 2019 . - pp-66-76.
Langues : Anglais (eng)
Catégories : FORESTERIE Exemplaires
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Cliquer pour voirURL Letters in Applied Microbiology, Vol 47, N° (2):. Phenotypic and genotypic characteristics of root-nodulating bacteria isolated from Acacia senegal(L. Wild.)in the dryland part of Senegal. / D Fall
Letters in Applied Microbiology, Vol 47, N° (2):. Phenotypic and genotypic characteristics of root-nodulating bacteria isolated from Acacia senegal(L. Wild.)in the dryland part of Senegal. [texte imprimé] / D Fall, Auteur ; D. Diouf, Auteur ; M Ourarhi, Auteur ; A. Faye, Auteur ; H Abdelmoumen, Auteur ; M. Neyra, Auteur ; S.N Sylla, Auteur ; M Missbah El Idrissi, Auteur . - 2008 . - pp - 85-97.
Langues : Anglais (eng)
Catégories : FORESTERIE Résumé : We characterized phenotypically and genotypically root-nodulating bacteria associated with Acacia senegal (L.) Willd. isolated from the soils surrounding A. senegal trees in the dry land area of Senegal Methods and Results: The phenotypical and genotypical characterizations we carried out showed a high diversity of A. senegal root-nodulating bacteria. Phenotypic patterns showed adaptations of the rhizobial strains to many environmental stresses such as heat, drought, and salinity. Twelve molecular groups were distinguished by profiles obtained using polymerase chain reaction ⁄ restriction fragment length polymorphism techniques from intergenic spacer region rDNA. The highest genetic diversity was found around the A. senegal rhizosphere. Therefore, A. senegal seemed to have a positive influ- ence on occurrence and genotypical diversity of rhizobial populations. Rhizobial isolates obtained in this study belonged phylogenetically to the genera Mesorhizobium and Rhizobium. Our results provided information about the genetic diversity of the rhizobial strains associated with A. senegal and suggested the adaptability of natural rhizobial populations to major ecological environmental stress within these soil environments. These results suggested a potential selection of compatible and well adapted strains under stress conditions as inocu- lants for successful A. senegal growth in arid lands. Exemplaires
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Cliquer pour voirURL Open Journal of Forestry, Vol 4, N° (2),. . Distribution and Diversity of Rhizobial Populations Associated with Acacia senegal (L.) Willd. Provenances in Senegalese Arid and Semiarid Regions / N Bakhoum
Open Journal of Forestry, Vol 4, N° (2),. . Distribution and Diversity of Rhizobial Populations Associated with Acacia senegal (L.) Willd. Provenances in Senegalese Arid and Semiarid Regions [texte imprimé] / N Bakhoum, Auteur ; C Le Roux, Auteur ; D. Diouf, Auteur ; A. Kane, Auteur ; F Ndoye, Auteur ; D Fall, Auteur ; R Duponnois, Auteur ; K Noba, Auteur ; S.N Sylla, Auteur ; A Galiana, Auteur . - 2014 . - pp-136-143.
Langues : Anglais (eng)
Catégories : FORESTERIE Mots-clés : Acacia senegal Mesorhizobium Diversity Symbiosis Ecology Phylogeny Résumé : Distribution and diversity of rhizobial strains associated with Acacia senegal (L.) Willd. in relation to seed provenances in soils from arid (Dahra) and semiarid (Goudiry) zones of Senegal were inves- tigated. PCR-RFLP performed on 16S-23S rDNA intergenic spacer (IGS) of nodule crude extracts re- vealed a high genetic diversity of rhizobial strains, which was higher in the semiarid region than in the arid region. The distribution of rhizobial populations was influenced by soil physical and chemical char- acteristics, and by A. senegal provenances as shown by the analysis of correspondence. In contrast, the phenotypic diversity of rhizobial strains was not correlated with the soil origin. The phylogenetic tree (performed by the maximum likelihood algorithm) of IGS 16S-23S sequences showed that most of the rhizobial strains nodulating A. senegal were closely related to Mesorhizobium plurifarium. Our results showed that rhizobial taxa associated with A. senegal were mainly distributed according to soil physical and chemical characteristics, and A. senegal provenances. A large subset of A. senegal root-nodulating bacteria had high diversity that correlated with the most favourable environmental conditions. Understanding the diversity and distribution of rhizobial strains may be exploited in the formulation of A. senegal inoculants for different seed provenances for resilience to soil stresses in various environmental conditions. Exemplaires
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Cliquer pour voirURL Plant and Soil, N°398. Senegalia Senegal response to inoculation with rhizobial strains vary in relation to seed provenance and soil type / N Bakhoum
Plant and Soil, N°398. Senegalia Senegal response to inoculation with rhizobial strains vary in relation to seed provenance and soil type [texte imprimé] / N Bakhoum, Auteur ; D.W Odee, Auteur ; Dioumacor Fall, Auteur ; F Ndoye, Auteur ; A. Kane, Auteur ; J.M Kimiti, Auteur ; A.M Zoubeirou, Auteur ; S.N Sylla, Auteur ; K Noba, Auteur ; D. Diouf, Auteur . - 2016 . - pp181-193.
Langues : Anglais (eng)
Catégories : FORESTERIE Mots-clés : Senegal, Provenance variation, Environmental conditions . Inoculation, Acacia, Mesorhizobium, Senegal, Rhizobia Index. décimale : K030- Génétique et amélioration des plantes Résumé : The focus of the study was to determine the symbiotic and growth response of three Senegalia Senegal (Syn. Acacia Senegal, gum arabic tree) provenances, namely Dahra (Senegal), Tera (Niger) and Makueni (Kenya)
to inoculation with selected S. Senegal nodulating rhizobia in soils from Dahra and Goudiry regions of Senegal, representing typical soil and enviromental conditions for establishing gum arabic production plantations. A greenhouse experiment was performed to evaluate the effect of 11 rhizobial strains on nodulation and growth of three S. Senegal provenances in two field soils, differing in nutrient status and indigenous rhizobia. After 4 months, plants were harvested for determination of nodulation, shoot and root dry weight. Nodulation and growth of S. Senegal var- ied in relation to rhizobial strain, provenance, soil type, and their interactions. Generally, nodulation was higher in Dahra than Goudiry soils, while Makueni provenance was the most compatible host. Inoculation had a significant effect on all parameters measured in Dahra field soil. By contrast, inoculation had a significant effect on height (shoot length), and shoot, root and total dry matter but not on nodulation. In the two field soils, seed provenance effect was significant for all parameters measured. The interaction between inoculation and provenance showed a significant effect on all parameters measured except nodule number in Dahra field soil while in Goudiry, the interaction had a significant effect on seedling height and shoot, root, and total dry matter but this effect was not significant with nodulation parameters. S. Senegal is variable in its response to inoculation, it is therefore advantageous to select and match effective rhizobia provenance symbionts for each site.Exemplaires
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Cliquer pour voirURL World Journal of Microbiology and Biotechnology, N°28:. Impact of rhizobial inoculation on Acacia senegal (L.) Willd. growth in greenhouse and soil functioning in relation to seed provenance and soil origin. / N Bakhoum
World Journal of Microbiology and Biotechnology, N°28:. Impact of rhizobial inoculation on Acacia senegal (L.) Willd. growth in greenhouse and soil functioning in relation to seed provenance and soil origin. [texte imprimé] / N Bakhoum, Auteur ; F Ndoye, Auteur ; A. Kane, Auteur ; K Assigbetsé, Auteur ; D Fall, Auteur ; S.N Sylla, Auteur ; K Noba, Auteur ; D. Diouf, Auteur . - 2012 . - pp- 2567-2579.
Langues : Anglais (eng)
Catégories : FORESTERIE Mots-clés : Rhizobial inoculation, Acacia senegal, Environment, Microbial diversity, Soil biofunctioning, Fertility Résumé : Rhizobial inoculation has a positive impact on plants growth; however, there is little information about its effect on soil microbial communities and their activity in the rhizosphere. It was therefore necessary to test the effect of inoculation of Acacia senegal (L.) Willd. seedlings with selected rhizobia on plant growth, structure and diversity of soil bacterial communities and soil functioning in relation to plant provenance and soil origin. In order to carry out this experiment, three A. senegal seeds provenance from Kenya, Niger, and Senegal were inoculated with selected rhizobial strains. They have been further grown during 4 months in greenhouse conditions in two non-disinfected soils, Dahra and Goudiry coming respectively from arid and semi-arid areas. The principal component analysis (ACP) showed an inoculation effect on plant growth, hizospheric bacterial diversity and soil functioning. However, the performances of the rhizobial strains varied in relation to the seed provenance and the soil origin. The selected rhizobial strains, the A. senegal provenance and the soil origin have modified the structure and the diversity of soil bacterial communities as measured by principal component analysis/denaturing gradient gel electrophoresis analyses. It is interesting to note that bacterial communities of Dahra soil were highly structured according to A. senegal provenance, whereas they were structured in relation to rhizobial inoculation in Goudiry soil. Besides, the impact of inoculation on soil microbial activities measured by fluorescein diacetate analyses varied in relation to plant provenance and soil origin. Nevertheless, total microbial activity was about two times higher in Goudiry, arid soil than in Dahra, semi-arid soil. Our results suggest that the rhizobial inoculation is a suitable tool for improving plants growth and soil fertility. Yet, the impact is dependent on inoculants, plant provenance and soil origin. It will, therefore, be crucial to identify the appropriate rhizobial strains and plant provenance or species in relation to the soil type. Exemplaires
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