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The rates and players of denitrification, dissimilatory nitrate reduction to ammonia (DNRA) and anaerobic ammonia oxidation (anammox) in mangrove soils.
Luvizotto, Danice M; Araujo, Juliana E; Silva, Michele DE Cássia P; Dias, Armando C F; Kraft, Beate; Tegetmeye, Halina; Strous, Marc; Andreote, Fernando D.
Afiliação
  • Luvizotto DM; Department of Soil Science, "Luiz de Queiroz" College of Agriculture, University of São Paulo, Avenue Pádua Dias 11, 13418-900 Piracicaba, SP, Brazil.
  • Araujo JE; Department of Soil Science, "Luiz de Queiroz" College of Agriculture, University of São Paulo, Avenue Pádua Dias 11, 13418-900 Piracicaba, SP, Brazil.
  • Silva MCP; Department of Soil Science, "Luiz de Queiroz" College of Agriculture, University of São Paulo, Avenue Pádua Dias 11, 13418-900 Piracicaba, SP, Brazil.
  • Dias ACF; Department of Environmental Sciences, Federal University of São Carlos. Rod. João Leme dos Santos, s/n, 18052-780 Sorocaba, SP, Brazil.
  • Kraft B; Department of Soil Science, "Luiz de Queiroz" College of Agriculture, University of São Paulo, Avenue Pádua Dias 11, 13418-900 Piracicaba, SP, Brazil.
  • Tegetmeye H; Microbial Fitness Group, Max Planck Institute for Marine Microbiology, Celsiusstrasse 1, D-28359 Bremen, Germany.
  • Strous M; Nordic Center for Earth Evolution, University of Southern Denmark, DK-5230, Odense, Denmark.
  • Andreote FD; Microbial Fitness Group, Max Planck Institute for Marine Microbiology, Celsiusstrasse 1, D-28359 Bremen, Germany.
An Acad Bras Cienc ; 91(suppl 1): e20180373, 2019.
Article em En | MEDLINE | ID: mdl-30379272
Mangroves are ecosystems located in the transition zone between land and sea, characterized by periodic flooding that confer to its unique characteristics. Little is known about the transformation of nutrients that occur during the organic matter degradation in this system. In this study, we monitor the nitrogen transformations in soils from three mangroves with distinct levels of contamination using labeled 15NO3-. We also screened the mangroves metagenomes for the presence of genes that encode enzymes involved in denitrification (nirS, nirK, nosZ, norB and narG), anaerobic oxidation of ammonia (anammox) (hh, hao and hzo) and dissimilatory nitrate reduction to ammonium (DNRA) (nrfA). The transformations of 15NO3- indicated the balance of denitrification over anammox and DNRA in all three mangroves, with lower rates of processes in the mangrove affected by oil contamination. The metagenomic analysis detected 56 sequences related to denitrification, 19 with anammox and 6 with DNRA. Genes related with denitrification were phylogenetically distributed among several groups of bacteria (mainly Gammaproteobacteria). Anammox and DNRA related sequences were affiliated with Planctomycetes and Gammaproteobacteria, respectively. Thus, metagenomic and functional approaches supported the description of denitrification, anammox and DNRA rates in mangrove soils, and identified the major bacterial groups involved in these processes.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Oxirredução / Áreas Alagadas / Desnitrificação / Amônia / Anaerobiose / Nitratos Tipo de estudo: Prognostic_studies Idioma: En Revista: An Acad Bras Cienc Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Brasil País de publicação: Brasil
Texto completo
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Oxirredução / Áreas Alagadas / Desnitrificação / Amônia / Anaerobiose / Nitratos Tipo de estudo: Prognostic_studies Idioma: En Revista: An Acad Bras Cienc Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Brasil País de publicação: Brasil