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Arid Land Research and Management. Effect of native and allochthonouss arbuscular mycorrhizal fungi on casuarina equisetifolia growth and its root bacterial community [texte imprimé] / Nathalie Diagne, Auteur ; E Baudoin, Auteur ; Sergio Svistoonoff, Auteur ; Christine Ouattara, Auteur ; Diegane Diouf, Auteur ; Aboubacry Kane, Auteur ; Cheikh Ndiaye, Auteur ; Kandioura Noba, Auteur ; Didier Bogusz, Auteur ; Claudine Franche, Auteur ; Robin Duponnois, Auteur . - [S.l.] : Arid Land research and Management, 2018 . - pp.1-18. : tabl., graph., fig. ISSN : ISSN: 1532-4982 Langues : Anglais ( eng) Langues originales : Français ( fre) Catégories : | RESSOURCES NATURELLES ET ENVIRONNEMENT
| Mots-clés : | champignons mycorhiziens arbusculaires croissance, casuarina equisetifolia communauté bactérienne | Index. décimale : | P342- Bactériologie et microbiologie du sol | Résumé : | Exotic trees are often planted to recover degraded lands. Inoculation with mycorrhizal fungi can improve their survival. Plant growth is partly dependent on the strain used, but little attention has been paid to the selection of mycorrhizal fungi. The aim of this study was to determine whether the growth of Casuarina equisetifolia L. (Johnson) is affected by two different mycorrhizal inocula generated using fungal spores retrieved from an Australian site (allochthonous soil) and a Senegalese site (native soil) under C. equisetifolia trees. Comparative experiments were conducted with plants in a Senegalese soil, previously sterilized or not, and grown in a greenhouse. At harvest, parameters related to plant growth and mycorrhization were evaluated and soil bacterial communities were compared. Tree growth was significantly influenced by both types of inoculants. In unsterilized soil, plants inoculated with the native inoculant were taller than plants inoculated with the allochthonous inoculant and control plants. The frequency of mycorrhization with both inoculants was higher in unsterilized soil. The strongest effects of the mycorhizosphere on the soil microbiome were obtained with the allochthonous inoculum, and analysis of the taxonomic composition revealed mycorrhizal communities specific to each inoculum. These results suggest that the development of C. equisetifolia and its root bacterial community are dependent on the composition of the mycorrhizal inoculum. The functional consequences of this rhizosphere effect in terms of soil fertility
should be further studied to better guide reforestation operations. |
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CN1903047 | P342-DIA | Article scientifique | CNRA/Bambey | Rayons | Exclu du prêt |
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KMS180003 | P351-THI | Fiches techniques | CNRA/Bambey | Dépot numérique | Exclu du prêt |
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/ Yedomon Ange Bovys Zoclanclounon
Hindawi International Journal of Agronomy, Vol 2019. Current Status of Pearl Millet Downy Mildew Prevalence across Agroecological Zones of Senegal [texte imprimé] / Yedomon Ange Bovys Zoclanclounon, Auteur ; Ghislain KANFANY, Auteur ; Aboubacry Kane, Auteur ; Daniel Fonceka, Auteur ; Georgina Lala Ehemba, Auteur ; Fatmata Ly, Auteur . - 2019 . - 8 p. Langues : Anglais ( eng) Langues originales : Anglais ( eng) Catégories : | SCIENCES ET PRODUCTIONS VEGETALES
| Mots-clés : | Maladie des plantes, mildiou, mil, Kaolack, Kaffrine, Tambacounda, Sedhiou. Thiès, Diourbel, Fatick | Index. décimale : | H280-Maladie des plantes | Résumé : | Pearl millet is a dominant staple cereal crop for smallholder farmers in Senegal. However, the crop is constrained by various nonbiotic and biotic stresses such as downy mildew disease. To assess the prevalence of this disease in Senegal, a field survey was conducted during the rainy season of 2017 across eight main pearl millet production regions following latitudinal gradient with different climatic conditions. Results showed that downy mildew prevalence was higher in Kaolack (incidence = 68.19%), Kaffrine (incidence = 77.19%), Tambacounda (incidence = 97.03%), Sedhiou (incidence = 82.78%), and Kolda (incidence = 98.01%) than Thies (incidence = 28.21%), Diourbel (incidence = 24.46%), and Fatick (incidence = 37.75%) regions. The field survey revealed an incidence as high as 98% and 28% of infected area in surveyed fields. Significant correlations between geographic coordinates, disease incidence, and infected areas were also observed. This study provided information that could help to understand the prevalence of downy mildew in pearl millet in Senegal. | En ligne : | https://www.hindawi.com/journals/tswj/2019/1252653/ |
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