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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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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]
Total Authors: 5
[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
Total Affiliations: 5
Document type: Journal article
Source: FEMS MICROBIOLOGY ECOLOGY; v. 95, n. 3 MAR 2019.
Web of Science Citations: 0

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)

FAPESP's process: 08/58114-3 - Monitoring the microbial diversity and functional activities in response to land-use changes and deforestation under soybean and sugarcane cultivations
Grantee:Tsai Siu Mui
Support type: Research Program on Global Climate Change - Thematic Grants
FAPESP's process: 14/50320-4 - Dimensions US-BIOTA - São Paulo: collaborative research: integrating dimensions of microbial biodiversity across land use change in tropical forests
Grantee:Tsai Siu Mui
Support type: BIOTA-FAPESP Program - Thematic Grants