Rice developmental stages modulate rhizosphere bacteria and archaea co-occurrence and sensitivity to long-term inorganic fertilization in a West African Sahelian agro-ecosystem
2023
Dondjou, Donald, Tchouomo | Diedhiou, Abdala, Gamby | Mbodj, Daouda | Mofini, Marie-Thérèse | Pignoly, Sarah | Ndiaye, Cheikh | Diedhiou, Issa | Assigbetse, Komi | Manneh, Baboucarr | Laplaze, Laurent | Kane, Aboubacry | Université Cheikh Anta Diop de Dakar [Sénégal] (UCAD) | Centre d’Excellence Africain en Agriculture pour la Sécurité Alimentaire et Nutritionnelle (AGRISAN) ; Université Cheikh Anta Diop de Dakar [Sénégal] (UCAD) | Centre d'Etude Regional Pour l'Amelioration de l'Adaptation A la Secheresse (CERAAS) | Institut sénégalais de recherches agricoles [Dakar] (ISRA) | LMI Adaptation des Plantes et microorganismes associés aux Stress Environnementaux [Dakar] (LAPSE) ; Institut de Recherche pour le Développement (IRD) | Africa Rice Center (AfricaRice), Sahel Regional ; Africa Rice Center [Côte d'Ivoire] (AfricaRice) ; Consultative Group on International Agricultural Research [CGIAR] (CGIAR)-Consultative Group on International Agricultural Research [CGIAR] (CGIAR) | LMI IESOL Intensification Ecologique des Sols Cultivés en Afrique de l’Ouest [Dakar] (IESOL) ; Institut de recherche pour le développement (IRD [Sénégal]) | Ecologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes (UMR Eco&Sols) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Montpellier ; Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro) | Diversité, adaptation, développement des plantes (UMR DIADE) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [Occitanie])-Université de Montpellier (UM) | Deutscher Akademischer Austauschdienst (DAAD, PhD Grant) | the Institut de Recherche pour le Développement (IRD), | the Ministère de l’Enseignement supérieur, de la Recherche et de l’Innovation du Sénégal (MESRI) through a Grant from the DFRSDT/FIRST program
International audience
Show more [+] Less [-]English. Background Rhizosphere microbial communities are important components of the soil-plant continuum in paddy field ecosystems. These rhizosphere communities contribute to nutrient cycling and rice productivity. The use of fertilizers is a common agricultural practice in rice paddy fields. However, the long-term impact of the fertilizers usage on the rhizosphere microbial communities at different rice developmental stages remains poorly investigated. Here, we examined the effects of long-term (27 years) N and NPK-fertilization on bacterial and archaeal community inhabiting the rice rhizosphere at three developmental stages (tillering, panicle initiation and booting) in the Senegal River Delta. Results We found that the effect of long-term inorganic fertilization on rhizosphere microbial communities varied with the rice developmental stage, and between microbial communities in their response to N and NPK-fertilization. The microbial communities inhabiting the rice rhizosphere at panicle initiation appear to be more sensitive to longterm inorganic fertilization than those at tillering and booting stages. However, the effect of developmental stage on microbial sensitivity to long-term inorganic fertilization was more pronounced for bacterial than archaeal community. Furthermore, our data reveal dynamics of bacteria and archaea co-occurrence patterns in the rice rhizosphere, with differentiated bacterial and archaeal pivotal roles in the microbial inter-kingdom networks across developmental stages. Conclusions Our study brings new insights on rhizosphere bacteria and archaea co-occurrence and the long-term inorganic fertilization impact on these communities across developmental stages in field-grown rice. It would help in developing strategies for the successful manipulation of microbial communities to improve rice yields.
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