Soil nutritional status and biogeography influence rhizosphere microbial communities associated with the invasive tree Acacia dealbata

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dc.contributor.author Kamutando, Casper N.
dc.contributor.author Vikram, Surendra
dc.contributor.author Kamgan-Nkuekam, Gilbert
dc.contributor.author Makhalanyane, Thulani P.
dc.contributor.author Greve, Michelle
dc.contributor.author Le Roux, Johannes J.
dc.contributor.author Richardson, David M.
dc.contributor.author Cowan, Don A.
dc.contributor.author Valverde, Angel
dc.date.accessioned 2017-08-29T08:47:08Z
dc.date.available 2017-08-29T08:47:08Z
dc.date.issued 2017-07-26
dc.description.abstract Invasiveness and the impacts of introduced plants are known to be mediated by plant-microbe interactions. Yet, the microbial communities associated with invasive plants are generally poorly understood. Here we report on the first comprehensive investigation of the bacterial and fungal communities inhabiting the rhizosphere and the surrounding bulk soil of a widespread invasive tree, Acacia dealbata. Amplicon sequencing data indicated that rhizospheric microbial communities differed significantly in structure and composition from those of the bulk soil. Two bacterial (Alphaproteobacteria and Gammaproteobacteria) and two fungal (Pezizomycetes and Agaricomycetes) classes were enriched in the rhizosphere compared with bulk soils. Changes in nutritional status, possibly induced by A. dealbata, primarily shaped rhizosphere soil communities. Despite a high degree of geographic variability in the diversity and composition of microbial communities, invasive A. dealbata populations shared a core of bacterial and fungal taxa, some of which are known to be involved in N and P cycling, while others are regarded as plant pathogens. Shotgun metagenomic analysis also showed that several functional genes related to plant growth promotion were overrepresented in the rhizospheres of A. dealbata. Overall, results suggest that rhizosphere microbes may contribute to the widespread success of this invader in novel environments. en_ZA
dc.description.department Genetics en_ZA
dc.description.department Plant Production and Soil Science en_ZA
dc.description.librarian am2017 en_ZA
dc.description.sponsorship Funding for this research was provided by the National Research Foundation, South Africa (Grant No. CPRR14071676470 to AV). SV is the recipient of a postdoctoral research fellowship from the Claude Leon Foundation, South Africa. DMR and JJLR received support from the DST-NRF Centre of Excellence for Invasion Biology. DMR and MG acknowledge funding from the National Research Foundation of South Africa (grants 85417 and 98889, respectively). en_ZA
dc.description.uri http://www.nature.com/srep en_ZA
dc.identifier.citation Kamutando, C.N., Vikram, S., Kamgan-Nkuekam, G., Makhalanyane, T.P., Greve, M., Roux, J.J.L., Richardson, D.M., Cowan, D. & Valverde, A. 2017, 'Soil nutritional status and biogeography influence rhizosphere microbial communities associated with the invasive tree Acacia dealbata', Scientific Reports, vol. 7, art. no. 6472, pp. 1-9. en_ZA
dc.identifier.issn 2045-2322 (online)
dc.identifier.other 10.1038/s41598-017-07018-w
dc.identifier.uri http://hdl.handle.net/2263/62129
dc.language.iso en en_ZA
dc.publisher Nature Publishing Group en_ZA
dc.rights © 2017 [kamutando et al]. This is an open-access article distributed underthe terms of the Creative Commons Attribution License 4.0. en_ZA
dc.subject Rhizosphere en_ZA
dc.subject Bulk soil en_ZA
dc.subject Acacia dealbata en_ZA
dc.subject Soil en_ZA
dc.subject Plant growth en_ZA
dc.subject Plant disease en_ZA
dc.subject Pezizomycetes en_ZA
dc.subject Nutritional status en_ZA
dc.subject Microbial communities en_ZA
dc.subject Metagenomics en_ZA
dc.subject Gammaproteobacteria en_ZA
dc.subject Fungal community en_ZA
dc.subject Biogeography en_ZA
dc.subject Amplicon en_ZA
dc.subject Alphaproteobacteria en_ZA
dc.title Soil nutritional status and biogeography influence rhizosphere microbial communities associated with the invasive tree Acacia dealbata en_ZA
dc.type Article en_ZA


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