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African Journal of Microbiology Research,, Vol 6. . Response of Acacia senegal(L.) Willd. seedlings and soil bio-functioning to inoculation with arbuscularmycorrhizal fungi, rhizobia and Pseudomonas fluorescens. / F Ndoye 

African Journal of Microbiology Research,, Vol 6. . Response of Acacia senegal(L.) Willd. seedlings and soil bio-functioning to inoculation with arbuscularmycorrhizal fungi, rhizobia and Pseudomonas fluorescens. [texte imprimé] / F Ndoye, Auteur ; A. Kane, Auteur ; N Bakhoum, Auteur ; A Sanon, Auteur ; D Fall, Auteur ; D. Diouf, Auteur ; M. O Sy, Auteur ; K Noba, Auteur . - 2012 . - pp-7176-7184. Langues : Anglais (eng) Catégories : FORESTERIE Mots-clés : Acacia senegal, arbuscular mycorrhizal fungi, rhizobia, Pseudomonas fluorescens, plant growth, soil bio-functioning Résumé : Acacia senegal is a multipurpose legume that is economically and ecologically important in Sahelian areas. The effects of arbuscular mycorrhizal fungal (AMF) inoculum (M) individually and in combination with rhizobia (R) and Pseudomonas fluorescens (Pf) were investigated on the growth and nutrition of A. senegal seedlings. In glasshouse conditions, all the inocula except Pf significantly enhanced A. senegal plant growth after 6 months in a non-sterile soil from Dahra (Senegal). However, no significant increase in shoot N content was recorded, whereas the application of MR, MPf and MRPf significantly improved shoot P content, and that of MR and MPf, shoot K content. The nodule number was significantly augmented by rhizobial inoculation and the root mycorrhizal colonization rate by MR, MPf and MRPf treatments. Soil spore density was increased by all inoculants except MPf, and soil AMF hyphal length by M, R and MRPf treatments. The inoculation with Pseudomonas and MPf significantly stimulated soil acid phosphatase activity, but no significant effect was observed on soil fluorescein diacetate (FDA) activity. Thus, the dual inoculation with AMF and R can be beneficial to A. senegal growth under non-sterile soil, where nutrients particularly P and N are often deficient

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Agroforest System, N°87. Response of Acacia senegal (L.) Willd. to inoculation with arbuscularmycorrhizal fungi isolates in sterilized and unsterilized soils in Senegal / F Ndoye 

Agroforest System, N°87. Response of Acacia senegal (L.) Willd. to inoculation with arbuscularmycorrhizal fungi isolates in sterilized and unsterilized soils in Senegal [texte imprimé] / F Ndoye, Auteur ; A. Kane, Auteur ; N Bakhoum, Auteur ; A Sanon, Auteur ; D Fall, Auteur ; D. Diouf, Auteur ; S. Sylla, Auteur ; Bâ A.M., Auteur ; M. O Sy, Auteur ; K Noba, Auteur . - 2013 . - pp - 941-952. Langues : Anglais (eng) Catégories : FORESTERIE Mots-clés : Acacia senegal, Arbuscular mycorrhizal fungi, Mycorrhizal root colonization, Relative mycorrhizal dependency, Soil fertility, Agroforestry Résumé : The benefits of inoculation with six arbuscular mycorrhizal fungi (AMF) isolates (Glomus aggregatum, G. fasciculatum, G. intraradices, G. manihotis, G. mosseae, and G. verriculosum) were investigated on seedlings of Acacia senegal (L.) Willd., a multipurpose tree legume highly valued for arabic gum production. Mycorrhizal root colonization, plant growth and relative mycorrhizal dependency (RMD) were measured in A. senegal seedlings growing in soils from three geo- graphical sites in Senegal (Dahra, Bambey and Goudiry) and two soil conditions (sterilized vs unsterilized) in the glasshouse. The impact of inoculation on mycorrhizal root colonization and plant growth depended on AMF isolates, soil origins and soil conditions. Mycorrhizal root colonization and plant growth were increased in sterilized soils regardless of soil origin and AMF isolates. The degree of RMD of A. senegal seedlings varied with soil origin, soil condition and AMF isolates. A. senegal showed the highest RMD values, reaching a maximum of 45 %, when inoculated with G. manihotis. However, in unsterilized soils, no significant effect of AMF inoculation on plant growth was observed despite significant root colonization with certain AMF isolates in Dahra and Goudiry soils. This indicates that the most infective AMF isolates were not the most effective and unsterilized soils may contain effective mycorrhizal propagules. In conclusion, it is important to consider the native mycorrhizal component of the soils before harnessing mycorrhizal inoculation programs for sustainable agroforestry systems.

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