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ARTIGO_MicrobialDiversity Cerrado.PDF2,35 MBAdobe PDFVisualizar/Abrir
Título: Microbial diversity in cerrado biome (neotropical savanna) soils
Autor(es): Castro, Alinne Pereira de
Silva, Maria Regina Silveira Sartori da
Quirino, Betânia Ferraz
Bustamante, Mercedes Maria da Cunha
Kruger, Ricardo Henrique
Assunto: Cerrados
Comunidades biológicas
Data de publicação: Fev-2016
Editora: Plos One
Referência: CASTRO, Alinne Pereira de. Microbial diversity in cerrado biome (neotropical savanna) soils. Plos One, p. 1-16, 5. fev. 2016. Disponível em: <http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0148785#sec007>. Acesso em: 12 dez. 2016. DOI: http://dx.doi.org/10.1371/journal.pone.0148785
Resumo: The Cerrado, the largest savanna region in South America, is located in central Brazil. Cerrado physiognomies, which range from savanna grasslands to forest formations, combined with the highly weathered, acidic clay Cerrado soils form a unique ecoregion. In this study, high-throughput sequencing of ribosomal RNA genes was combined with shotgun metagenomic analysis to explore the taxonomic composition and potential functions of soil microbial communities in four different vegetation physiognomies during both dry and rainy seasons. Our results showed that changes in bacterial, archaeal, and fungal community structures in cerrado denso, cerrado sensu stricto, campo sujo, and gallery forest soils strongly correlated with seasonal patterns of soil water uptake. The relative abundance AD3, WPS-2, Planctomycetes, Thermoprotei, and Glomeromycota typically decreased the rainy season, whereas the relative abundance of Proteobacteria and Ascomycota increased. In addition, analysis of shotgun metagenomic data revealed a significant increase in the relative abundance of genes associated with iron acquisition and metabolism, dormancy, and sporulation during the dry season, and an increase in the relative abundance of genes related to respiration and DNA and protein metabolism during the rainy season. These gene functional categories are associated with adaptation to water stress. Our results further the understanding of how tropical savanna soil microbial communities may be influenced by vegetation covering and temporal variations in soil moisture.
Licença: Copyright: © 2016 Pereira de Castro et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Fonte: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0148785. Acesso em: 12 dez. 2016.
DOI: http://dx.doi.org/10.1371/journal.pone.0148785
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