Article (Scientific journals)
Site climate more than soil properties and topography shape the natural arbuscular mycorrhizal symbiosis in maize and spore density within rainfed maize (Zea mays L.) cropland in the eastern DR Congo.
Ndeko, Adrien Byamungu; Diedhiou, Abdala Gamby; Founoune-Mboup, Hassna et al.
2024In PLoS ONE, 19 (12), p. 0312581
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Keywords :
Soil; Climate; Plant Roots/microbiology; Democratic Republic of the Congo; Crops, Agricultural/microbiology; Crops, Agricultural/growth & development; Rhizosphere; Zea mays/microbiology; Zea mays/growth & development; Mycorrhizae/physiology; Soil Microbiology; Soil/chemistry; Spores, Fungal; Symbiosis
Abstract :
[en] Rhizosphere microorganisms, particularly arbuscular mycorrhizal fungi (AMF), play a vital role in enhancing sustainable maize production. However, uncertainty persist regarding the influence of climate variables and soil properties on mycorrhizal colonization (MC) of maize and the abundance of AM fungal spores in the field. This study aimed to explore the environmental factors such as site climate variables, soil physicochemical properties and topography and vegetation variable, affecting the natural MC of maize and the density of AMF spores. The study hypothesizes that natural maize mycorrhizal colonization and AMF spore density vary significantly across different sites and agroecological zones. It further posits that climatic and edaphic variables predominantly explain the observed variation in mycorrhizal parameters. To assess the impact of these factors, a field study was conducted in 32 sites across three territories in the province of South Kivu, namely Kabare, Walungu, and Uvira. Rhizospheric soil and maize roots were collected from different sites. Maize MC varied significantly among sites, with Kabare and Walungu showing high colonization rates (52.1% and 44.7%, respectively) compared to Uvira (26.40%). Meanwhile, spore density was significantly higher in Uvira (1331.7 spores g-1 soil) than in Kabare (518.9 spores g-1 soil) and Walungu (468.58 spores g-1 soil). Correlation analysis indicated that maize MC was influenced by site climate and soil properties. The PLS-SEM model demonstrated that 76.5% (R2) of the total variance in maize root MC was explained by climatic variables and soil chemical properties. Compared to soil chemical properties, climate characteristics had a more pronounced impact on maize MC. Maize MC was inversely correlated with temperature, C and available P content, while being directly and positively correlated with altitude, rainfall, and base saturation rate. Furthermore, 68.5% (R2) of the spore density variability of AMF was explained by climatic variables and soil physical properties. Spore density was inversely correlated with sand and clay content, field capacity, rainfall, and altitude, while being positively correlated with temperature. The results of this study indicate that climatic conditions exert a more pronounced influence on the mycorrhizal colonization of maize and the density of AMF spores than soil characteristics.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Ndeko, Adrien Byamungu ;  Department of Crop Production, Faculty of Agriculture and Environmental Sciences, Université Evangélique en Afrique (UEA), Bukavu, Democratic Republic of the Congo ; Département de Biologie Végétale, Faculté des Sciences et Techniques, Université Cheikh Anta Diop (UCAD), Dakar, Senegal ; Laboratoire Commun de Microbiologie (LCM) IRD/ISRA/UCAD, Centre de Recherche de Bel Air, Dakar, Senegal
Diedhiou, Abdala Gamby;  Département de Biologie Végétale, Faculté des Sciences et Techniques, Université Cheikh Anta Diop (UCAD), Dakar, Senegal ; Laboratoire Commun de Microbiologie (LCM) IRD/ISRA/UCAD, Centre de Recherche de Bel Air, Dakar, Senegal
Founoune-Mboup, Hassna;  Laboratoire Commun de Microbiologie (LCM) IRD/ISRA/UCAD, Centre de Recherche de Bel Air, Dakar, Senegal ; ISRA_LNRPV, Laboratoire National de Recherches sur les Productions Végétales (LNRPV), Dakar, Senegal
Chuma Basimine, Géant  ;  Université de Liège - ULiège > Sphères ; Université de Liège - ULiège > Département de géographie > Service de géographie rurale (Laboratoire pour l'analyse des lieux, des paysages et des campagnes européennes LAPLEC) ; Université de Liège - ULiège > Faculté des Sciences > Form. doct. sc. (géog. - paysage) ; Université de Liège - ULiège > Faculté des Sciences > Doct. scienc. (géographie) ; UEA - Université Evangélique en Afrique
Mugumaarhahama, Yannick;  Department of Crop Production, Faculty of Agriculture and Environmental Sciences, Université Evangélique en Afrique (UEA), Bukavu, Democratic Republic of the Congo ; Unit of Applied Biostatistics, Faculty of Agriculture and Environmental Sciences, Université Evangélique en Afrique, Bukavu, South Kivu, Democratic Republic of Congo
Diouf, Diegane;  Département de Biologie Végétale, Faculté des Sciences et Techniques, Université Cheikh Anta Diop (UCAD), Dakar, Senegal ; Laboratoire Commun de Microbiologie (LCM) IRD/ISRA/UCAD, Centre de Recherche de Bel Air, Dakar, Senegal
Fall, Saliou;  Laboratoire Commun de Microbiologie (LCM) IRD/ISRA/UCAD, Centre de Recherche de Bel Air, Dakar, Senegal ; ISRA_LNRPV, Laboratoire National de Recherches sur les Productions Végétales (LNRPV), Dakar, Senegal
Mushagalusa, Gustave Nachigera;  Department of Crop Production, Faculty of Agriculture and Environmental Sciences, Université Evangélique en Afrique (UEA), Bukavu, Democratic Republic of the Congo
Kane, Aboubacry;  Département de Biologie Végétale, Faculté des Sciences et Techniques, Université Cheikh Anta Diop (UCAD), Dakar, Senegal ; Laboratoire Commun de Microbiologie (LCM) IRD/ISRA/UCAD, Centre de Recherche de Bel Air, Dakar, Senegal
Language :
English
Title :
Site climate more than soil properties and topography shape the natural arbuscular mycorrhizal symbiosis in maize and spore density within rainfed maize (Zea mays L.) cropland in the eastern DR Congo.
Publication date :
2024
Journal title :
PLoS ONE
eISSN :
1932-6203
Publisher :
Public Library of Science (PLoS), United States
Volume :
19
Issue :
12
Pages :
e0312581
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
USAID - United States Agency for International Development
BMGF - Bill and Melinda Gates Foundation
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