Herrmann Laetitia, Zoubeirou Alzouma Mayaki, Sanon Kady, Diouf Diégane, Dianda Mahamadi, Faye Aliou, Fall Dioumacor, Mburu Harrison N., Muema Esther, Thuita Moses, Lesueur Didier.
2008. Impact of the rhizobial inoculation of Acacia senegal mature trees on the both indigenous rhizospheric microbial and fungal communities in Senegal, Burkina Faso and Niger.
In : The 13th Congress of the African Association for Biological Nitrogen Fixation, satellite workshop on Mycorrhiza, December 15th - 18th 2008, Hammamet, Tunisia : book of abstracts. CBBC, AABNF, Tunisian Association for Biotechnology
Résumé : Many Acacia species are known to improve soil fertility and yields of associated crops. Their capacity to form symbiotic associations with soil bacteria called Rhizobium and mycorrhizal fungi improves growth and mineral nutrition. Associated crops can take benefits of this by acquiring some N and organic matter (mainly through litter). Acacia species are therefore very important in arid and semi arid zones, where land degradation and deforestation induce soil fertility decline. Acacia Senegal is a species of major importance because it produces gum arable. This gum has very high economic value and it is an important source of cash income for farmers. Growth and vigour of the trees can be improved by inoculation by specific Rhizobium strains. This inoculation also has a positive effect on the production of gum Arabic. This study, conducted using soils from Senegal, Burkina Faso and Niger assesses the changes caused by the inoculation by Sinorhizob^um strains on bacterial and fungal communities from different periods : rainy and dry (gum production) seasons. Bacterial and fungal diversity are assessed by DGGE and Shannon indexes based statistical analysis. Results show different effects on microbial diversity, depending on countries. In Senegal, bacterial diversity is affected by inoculation, and bacterial and fungal diversities are increased in dry season. Bacterial diversity is increased in dry season in Niger as well, but there is no significant effect of both factors in Burkina Faso. More studies will be conducted by PCR-DGGE to target specific communities, which are involved in nitrogen cycle.
Mots-clés Agrovoc : Acacia senegal, inoculation, flore du sol, Rhizobiaceae, rhizosphère
Mots-clés géographiques Agrovoc : Burkina Faso, Sénégal, Niger
Classification Agris : P34 - Biologie du sol
F62 - Physiologie végétale - Croissance et développement
Auteurs et affiliations
- Herrmann Laetitia
- Zoubeirou Alzouma Mayaki, Université Abdou Moumouni (NER)
- Sanon Kady, INERA (BFA)
- Diouf Diégane, UCAD (SEN)
- Dianda Mahamadi, INERA (BFA)
- Faye Aliou, IRD (SEN)
- Fall Dioumacor, UCAD (SEN)
- Mburu Harrison N., TSBF (KEN)
- Muema Esther, TSBF (KEN)
- Thuita Moses
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Lesueur Didier, CIRAD-PERSYST-UPR Ecosystèmes de plantations (KEN)
ORCID: 0000-0002-6694-0869
Autres liens de la publication
Source : Cirad - Agritrop (https://agritrop.cirad.fr/562607/)
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