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Changes in the rhizosphere and root-associated bacteria community of white Guinea yam (Dioscorea rotundata Poir.) impacted by genotype and nitrogen fertilization

dc.contributor.authorIdowu, A.P.
dc.contributor.authorYamamoto, K.
dc.contributor.authorKoizumi, T.
dc.contributor.authorMatsutani, M.
dc.contributor.authorTakada, K.
dc.contributor.authorShiwa, Y.
dc.contributor.authorAsfaw, A.
dc.contributor.authorMatsumoto, R.
dc.contributor.authorOuyabe, M.
dc.contributor.authorPachakkil, B.
dc.contributor.authorKikuno, H.
dc.contributor.authorShiwachi, H.
dc.date.accessioned2024-10-07T09:06:06Z
dc.date.available2024-10-07T09:06:06Z
dc.date.issued2024-06-30
dc.identifier.citationIdowu, A.P., Yamamoto, K., Koizumi, T., Matsutani, M., Takada, K., Shiwa, Y., ... & Shiwachi, H. (2024). Changes in the rhizosphere and root-associated bacteria community of white Guinea yam (Dioscorea rotundata Poir.) impacted by genotype and nitrogen fertilization. Heliyon, 10(12: e33169), 1-16.
dc.identifier.issn2405-8440
dc.identifier.urihttps://hdl.handle.net/20.500.12478/8582
dc.description.abstractThe bacterial diversity and composition of water yam (Dioscorea alata L. cv. A-19), which can grow without chemical fertilization, have recently been characterized with no significant differences compared with the use of chemical fertilization. However, the diversity and community structure of bacteria associated with the white Guinea yam (Dioscorea rotundata), the most cultivated and economically important yam in West Africa, have not yet been investigated. This study characterized the bacterial diversity and composition associated with bulk soil, rhizosphere, and plant roots in six white Guinea yam genotypes (S004, S020, S032, S042, S058, and S074) in field experiments in Ibadan, Nigeria under N-based chemical fertilizer application. The largest diversity of bacteria was found in the bulk soil, followed by the rhizosphere and roots. Based on the alpha diversity analysis, the bacterial diversity in both S020 and S042 increased with fertilizer application among the bulk soil samples. S058 grown under no-fertilizer conditions had the highest bacterial diversity among the rhizosphere samples. Beta diversity analysis highlighted the significant difference in the composition of bacteria associated with the genotypes and fertilizer treatments, and S032 had a unique bacterial composition compared to the other genotypes. The dominant phylum across all sample types was Proteobacteria. Actinobacteriota was the dominant phylum among bulk soil samples. At the genus level, Bacillus was the most abundant bacterial genus across both the control and treated samples. Pseudomonas was predominant across all rhizosphere samples. Chryseobacterium, Sphingobium, Delftia and Klebsiella associated with the rhizosphere were shown the altered relative abundance between the control and treated samples depending on genotypes. A genus related to symbiotic nitrogen-fixing bacteria, the Allorhizobium-Neorhizobium-Pararhizobium-Rhizobium clade, showed higher relative abundance among all root samples, indicating that it is a core bacterial genus. Furthermore, the field application of chemical fertilizer had a significant impact on the relative abundances of two genera related to symbiotic nitrogen-fixers, Allorhizobium-Neorhizobium-Pararhizobium-Rhizobium clade and Bradyrhizobium in the rhizosphere and root. These results suggest that N-based chemical fertilizers and plant genotypes would influence the compositional arrangement of associated bacterial communities, including symbiotic nitrogen-fixing bacteria.
dc.description.sponsorshipJapan International Cooperation Agency-African Business Education Initiatives
dc.format.extent1-16
dc.language.isoen
dc.subjectYams
dc.subjectBacterial Diseases
dc.subjectDioscorea Alata
dc.subjectNitrogen Fixation
dc.subjectFertilization
dc.titleChanges in the rhizosphere and root-associated bacteria community of white Guinea yam (Dioscorea rotundata Poir.) impacted by genotype and nitrogen fertilization
dc.typeJournal Article
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.affiliationTokyo University of Agriculture
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.coverage.hubHeadquarters and Western Africa Hub
cg.researchthemeBiotech and Plant Breeding
cg.identifier.bibtexciteidIDOWU:2024
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectFood Security
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Production
cg.iitasubjectYam
cg.journalHeliyon
cg.notesOpen Access Journal
cg.accessibilitystatusOpen Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCreative Commons Attribution 4.0 (CC BY 0.0)
cg.targetaudienceScientists
cg.identifier.doihttps://doi.org/10.1016/j.heliyon.2024.e33169
cg.iitaauthor.identifierAsrat Asfaw: 0000-0002-4859-0631
cg.iitaauthor.identifierRyo Matsumoto: 0000-0002-0106-6728
cg.futureupdate.requiredNo
cg.identifier.issue12: e33169
cg.identifier.volume10


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