Taxonomical and functional microbial community selection in soybean rhizosphere

Autor(es)

Mendes, Lucas W. ^{[1, 2]} ; Kuramae, Eiko E. ^[1] ; Navarrete, Acacio A. ^{[1, 2]} ; van Veen, Johannes A. ^{[3, 1]} ; Tsai, Siu M. ^[2]

Afiliação do(s) autor(es)

^[1] Netherlands Inst Ecol, NIOO KNAW, Dept Microbial Ecol, NL-6708 PB Wageningen - Netherlands

^[2] Univ Sao Paulo, CENA, Cell & Mol Biol Lab, Piracicaba - Brazil

^[3] Leiden Univ, Inst Biol, Leiden - Netherlands

• Tipo de documento: Artigo Científico
• Fonte: ISME Journal; v. 8, n. 8, p. 1577-1587, AUG 2014.
• Citações Web of Science: 168

Resumo

This study addressed the selection of the rhizospheric microbial community from the bulk soil reservoir under agricultural management of soybean in Amazon forest soils. We used a shotgun metagenomics approach to investigate the taxonomic and functional diversities of microbial communities in the bulk soil and in the rhizosphere of soybean plants and tested the validity of neutral and niche theories to explain the rhizosphere community assembly processes. Our results showed a clear selection at both taxonomic and functional levels operating in the assembly of the soybean rhizosphere community. The taxonomic analysis revealed that the rhizosphere community is a subset of the bulk soil community. Species abundance in rhizosphere fits the log-normal distribution model, which is an indicator of the occurrence of niche-based processes. In addition, the data indicate that the rhizosphere community is selected based on functional cores related to the metabolisms of nitrogen, iron, phosphorus and potassium, which are related to benefits to the plant, such as growth promotion and nutrition. The network analysis including bacterial groups and functions was less complex in rhizosphere, suggesting the specialization of some specific metabolic pathways. We conclude that the assembly of the microbial community in the rhizosphere is based on niche-based processes as a result of the selection power of the plant and other environmental factors. (AU)

• Processo FAPESP: 10/20353-7 - Análise das comunidades microbianas em solos sob diferentes usos da terra na fronteira de expansão agrícola no Sudoeste da Amazônia
• Beneficiário: Lucas William Mendes
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 11/51749-6 - Bioindicadores funcionais para monitoramento da qualidade do solo para o manejo sustentável da produção de biomassa em cana-de-açúcar (BIOSQ)
• Beneficiário: Tsai Siu Mui
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Regular
• Processo FAPESP: 08/58114-3 - Monitoring the microbial diversity and functional activities in response to land-use changes and deforestation under soybean and sugarcane cultivations
• Beneficiário: Tsai Siu Mui
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático