Título:	Structure and composition of bacterial and fungal community in soil under soybean monoculture in the Brazilian Cerrado
Autor(es):	Bresolin, Joana Dias Bustamante, Mercedes Maria da Cunha Krüger, Ricardo Henrique Silva, Maria Regina Silveira Sartori da Perez, K. S.
Assunto:	Savanas Uso da terra Cultivo Comunidades microbianas Eletroforese em gel Soja
Data de publicação:	Jun-2010
Editora:	Sociedade Brasileira de Microbiologia
Referência:	BRESOLIN, J. D. et al. Structure and composition of bacterial and fungal community in soil under soybean monoculture in the Brazilian Cerrado. Brazilian Journal of Microbiology, São Paulo, v. 41, n. 2, p. 391-403, abr./jun. 2010. DOI: http://dx.doi.org/10.1590/S1517-83822010000200021. Disponível em: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000200021&lng=en&nrm=iso. Acesso em: 25 jan. 2021.
Abstract:	Soybean is the most important oilseed cultivated in the world and Brazil is the second major producer. Expansion of soybean cultivation has direct and indirect impacts on natural habitats of high conservation value, such as the Brazilian savannas (Cerrado). In addition to deforestation, land conversion includes the use of fertilizers and pesticides and can lead to changes in the soil microbial communities. This study evaluated the soil bacterial and fungal communities and the microbial biomass C in a native Cerrado and in a similar no-tillage soybean monoculture area using PCR-DGGE and sequencing of bands. Compared to the native area, microbial biomass C was lower in the soybean area and cluster analysis indicated that the structure of soil microbial communities differed. 16S and 18S rDNA dendrograms analysis did not show differences between row and inter-row samples, but microbial biomass C values were higher in inter-rows during soybean fructification and harvest. The study pointed to different responses and alterations in bacterial and fungal communities due to soil cover changes (fallow x growth period) and crop development. These changes might be related to differences in the pattern of root exudates affecting the soil microbial community. Among the bands chosen for sequencing there was a predominance of actinobacteria, y-proteobacteria and ascomycetous divisions. Even under no-tillage management methods, the soil microbial community was affected due to changes in the soil cover and crop development, hence warning of the impacts caused by changes in land use.
Licença:	Brazilian Journal of Microbiology - All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License (CC BY NC 4.0). Fonte: https://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000200021&lng=en&nrm=iso&tlng=en. Acesso em: 25 jan. 2021.
DOI:	https://dx.doi.org/10.1590/S1517-83822010000200021
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