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Journal of Arid Environments. Soil microbial functional capacity and diversity in a millet-shrub intercropping system of semi-arid Senegal [texte imprimé] / S Diakhaté, Auteur ; M. Gueye, Auteur ; T chevallier, Auteur ; .N H. Diallo, Auteur ; K Assigbetsé, Auteur ; J Abadie, Auteur ; M. Diouf, Auteur ; Dominique Masse, Auteur ; Mbacké Sembène, Auteur ; Ndèye Yacine Badiane Ndour, Auteur ; R.P. Dick, Auteur ; L. C. Lardy, Auteur . - Dakar (Sénégal) : ISRA/LNRPV, 2016 . - 09p. Langues : Anglais ( eng)
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PV1700039 | F083- DIA | Article scientifique | LNRPV | Rayons | Exclu du prêt |
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Journal of Arid Environments, vol.129. Soil microbial fonctional capacity and diversity in a millet-shrub intercropping system of semi-arid Senegal. [texte imprimé] / S Diakhaté, Auteur ; M. Gueye, Auteur ; T. Chevallier, Auteur ; N. H. Diallo, Auteur ; K Assigbetsé, Auteur ; J Abadie, Auteur ; M. Diouf, Auteur ; Dominique Masse, Auteur ; Mbacké Sembène, Auteur ; Ndèye Yacine Badiane Ndour, Auteur ; R.P. Dick, Auteur ; L Chapuis-Lardy, Auteur . - [s.d.] . - pp.71-29. Langues : Anglais ( eng) Catégories : | RESSOURCES NATURELLES ET ENVIRONNEMENT
| Mots-clés : | Activités enzymatiques du sol, fertilité du sol | Index. décimale : | P345-Biochimie du sol: litière du sol, décomposition ; humus | Résumé : | A few species of shrubs grow with dryland row crops in farmers’ fields throughout the Sahel and can significantly increase crop yield. The presence of shrub roots and litter inputs should have implications for soil nutrient pool sizes but there is limited information on the interactions of these shrubs with microbial communities involved in biogeochemical processes. Therefore, the objective of this study was to determine the microbial composition and functional capacity of soil from the rooting zone of pearl millet (Pennisetum glaucum) grown in the presence or absence of the shrub Piliostigma reticulatum in Senegal. Soil samples were collected from a long-term field study where millet was cultivated alone or intercropped with P. reticulatum with annual incorporation of coppiced shrub residues. Higher nutrient contents and distinct differences in microbial communities (DGGE profiles) were found between soils from beneath the canopy compared to soil outside the influence of shrubs. The catabolic response profile (MicroResp™) showed that the soil microbial community at both shrub and non-shrub sampling locations, metabolized a wide range of substrates. Trehalose that can work as a signaling molecule was more rapidly degraded in the rooting zone of millet growing in the presence of P. reticulatum over millet alone. Urease, arylsulfatase and dehydrogenase activities in the millet root zone soil were higher when intercropped with P. reticulatum which indicates enhanced potential of biogeochemical processes to proceed in the presence of this shrub. It is concluded that the native shrub P. reticulatum promotes a more diverse and active microbial community in the rooting zone of millet and further indicates greater potential to
perform decomposition and mineralize nutrients. |
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CT1900007 | P345-DIA | Article scientifique | CRA/Tamba | Dépot numérique | Exclu du prêt |
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Journal of Veterinary Medicine and Animal Health. Genetic evolution of infectious bursal disease virus in Senegal [texte imprimé] / A Badji, Auteur ; Alpha Amadou Diallo, Auteur ; M Ducatez, Auteur ; Fatou Tall Lo, Auteur ; M. Mbengue, Auteur ; M. Diouf, Auteur ; Y. Samb, Auteur ; M. Diop, Auteur ; M.M Lo, Auteur ; Y Thiongane, Auteur ; J. G. Guerin, Auteur ; R. B Alambedji, Auteur . - Dakar (PRH, Sénégal) : ISRA/LNERV, 2016 . - 08p. ISSN : 2141-2529 Langues : Anglais ( eng)
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ZV0170145 | L100- BAD | Article scientifique | LNERV | Rayons | Exclu du prêt |
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Journal of Veterinary Medicine and Animal Health. Genetic evolution of infectious bursal disease virus in Senegal [texte imprimé] / A Badji, Auteur ; Alpha Amadou Diallo, Auteur ; M Ducatez, Auteur ; Fatou Tall Lo, Auteur ; M. Diouf, Auteur ; Y. Samb, Auteur ; M. Diop, Auteur ; M.M Lo, Auteur ; Y Thiongane, Auteur ; Guerin J.L, Auteur ; R. B Alambedji, Auteur . - Dakar (PRH, Sénégal) : ISRA/LNERV, 2016 . - 07p. : ref,;. Langues : Anglais ( eng) Catégories : | SCIENCES, PRODUCTION ET PROTECTION ANIMALES
| Mots-clés : | Infection de la Maladie, Analyse Phylogénique, Sénégal, Evolution du Virus | Index. décimale : | L741-Troubles d'origine génétique;trouble de la reproduction: accidents de la gestation et de la parturition | Résumé : | In recent years very virulent (VV) IBDV strains and classical (CV) IBDV strains re-emerged and caused
devastating outbreaks in different parts of the world. In this study, genetic evolution of fifteen IBDVs
collected in Senegal in 1979, 1999, 2007, 2012, 2013 and 2014 was characterized to gain information for
a better control of IBD. Following RT-PCR, nucleotide sequence of the VP2 hypervariable region was
determined and compared with sequences available in GenBank. Phylogenetic analysis showed that the
viruses diverged into two genotypes: Very virulent (VV) IBDV and classical virulent (CV) IBDV. The
Senegalese field strains of the first genotype (VV) IBDV had 98.9 to 100% identity among themselves,
whereas their identity with reported Nigerian (VV) IBDVs ranged between 96.7 and 99%. The close
phylogenetic relationship of the Senegalese and Nigerian strains suggests that they likely derived from
a common ancestor. In the phylogenetic tree, all the Senegalese (VV) IBDV strains belonged to the
African very virulent types (VV2). The genotyping of senegalese field IBDV strains indicated that the
majority of viruses circulating in Senegal are (VV) IBDVs and highlights a genetic stability. |
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ZV0170081 | L741- BAD | Article scientifique | LNERV | Rayons | Exclu du prêt |
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Journal of Veterinary Medicine and Animal Health, Vol. 8, n°12. Genetic evolution of infectious bursal disease virus in Senegal [texte imprimé] / Alkaly Badji, Auteur ; Alpha Amadou Diallo, Auteur ; Mariette Ducatez, Auteur ; Fatou Tall Lo, Auteur ; Mbaye Mbengue, Auteur ; M. Diouf, Auteur ; Y. Samb, Auteur ; Mariane Diop, Auteur ; Mamadou Moustapha Lo, Auteur ; Yaya Thiongane, Auteur ; Jean Luc Guerin, Auteur ; Rianatou Bada Alambédji, Auteur . - [s.d.] . - pp. 237-243. ISSN : 2141-2529 Langues : Français ( fre) Catégories : | SCIENCES, PRODUCTION ET PROTECTION ANIMALES
| Mots-clés : | Maladie virale, maladie bursale infectieuse | Index. décimale : | L730-Maladie des animaux | Résumé : | In recent years very virulent (VV) IBDV strains and classical (CV) IBDV strains re-emerged and caused devastating outbreaks in different parts of the world. In this study, genetic evolution of fifteen IBDVs collected in Senegal in 1979, 1999, 2007, 2012, 2013 and 2014 was characterized to gain information for a better control of IBD. Following RT-PCR, nucleotide sequence of the VP2 hypervariable region was determined and compared with sequences available in GenBank. Phylogenetic analysis showed that the viruses diverged into two genotypes: Very virulent (VV) IBDV and classical virulent (CV) IBDV. The Senegalese field strains of the first genotype (VV) IBDV had 98.9 to 100% identity among themselves, whereas their identity with reported Nigerian (VV) IBDVs ranged between 96.7 and 99%. The close phylogenetic relationship of the Senegalese and Nigerian strains suggests that they likely derived from a common ancestor. In the phylogenetic tree, all the Senegalese (VV) IBDV strains belonged to the African very virulent types (VV2). The genotyping of senegalese field IBDV strains indicated that the majority of viruses circulating in Senegal are (VV) IBDVs and highlights a genetic stability. |
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ZV0170120 | L730-BAD | Article scientifique | LNERV | Rayons | Exclu du prêt |
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