Amazon forest-to-agriculture conversion alters rhizosphere microbiome composition while functions are kept

Autor(es)

Goss-Souza, Dennis ^{[1, 2, 3]} ; Mendes, Lucas William ^[2] ; Borges, Clovis Daniel ^{[4, 2]} ; Rodrigues, Jorge L. M. ^{[1, 5]} ; Tsai, Siu Mui ^[2]

Afiliação do(s) autor(es)

^[1] Univ Calif Davis, Dept Land Air & Water Resources, Davis, CA 95616 - USA

^[2] Univ Sao Paulo, Ctr Nucl Energy Agr, Ave Centenario, 303, CP 96, BR-13400970 Piracicaba, SP - Brazil

^[3] Santa Catarina State Univ, Dept Soils & Nat Resources, BR-88523000 Lages, SC - Brazil

^[4] MIT, Dept Civil & Environm Engn, 77 Massachusetts Ave, Cambridge, MA 02139 - USA

^[5] Lawrence Berkeley Natl Lab, Environm Genom & Syst Biol Div, Berkeley, CA 94720 - USA

• Tipo de documento: Artigo Científico
• Fonte: FEMS MICROBIOLOGY ECOLOGY; v. 95, n. 3 MAR 2019.
• Citações Web of Science: 1

Resumo

The conversion of native forest to agriculture is the main cause of microbial biodiversity loss in Amazon soils. In order to better understand this effect, we used metagenomics to investigate microbial patterns and functions in bulk soil and rhizosphere of soybean, in a long-term forest-to-agriculture conversion. Long-term forest-to-agriculture led to microbial homogenization and loss of diversity in both bulk soil and rhizosphere, mainly driven by decreasing aluminum concentration and increased cations saturation in soil, due to liming and fertilization in long-term no-till cropping. Data revealed that long-term no-till cropping culminated in a decrease in Acidobacteria, Actinobacteria and Proteobacteria abundances. However, alpha- and beta-Proteobacteria abundances were higher in the rhizosphere than in bulk soil, regardless of the time after forest-to-agriculture conversion. Changes in functional potential occurred predominantly in bulk soil, with decreases in functions related to potassium metabolism and virulence, disease and defense, while functions related to nucleic acids metabolism increased. Functions in the soybean rhizosphere remained stable, except for those related to potassium metabolism, which decreased after 20-year no-till cropping. Together, our results show that the soybean root system selects microbial taxa via trade-offs, to maintain functional resilience in the rhizosphere microbiome over time. (AU)

• Processo FAPESP: 14/50320-4 - Dimensões US-BIOTA - São Paulo: pesquisa colaborativa: integrando as dimensões da biodiversidade microbiana ao longo de áreas de alteração do uso da terra em florestas tropicais
• Beneficiário: Tsai Siu Mui
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático
• 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