Journal article
The importance of denitrification performed by nitrogen-fixing bacteria used as inoculants in South America
Plant and Soil, Vol.451, pp.5-24
2019
Abstract
Background
Replacing synthetic fertilizers by biological nitrogen fixation (BNF) is regarded as an environmentally sound practice, but some diazotrophic bacteria are capable of emitting N2O by denitrification. The ability to use nitrate represents an ecological advantage for the survival of some microorganisms under O2-limiting conditions, but may contribute to increased N2O emissions.
Scope
The importance of denitrification performed by N2-fixing bacteria used as inoculants in South America is discussed, especially the possibility of these bacteria act as N2O source or sink.
Conclusions
There is no doubt of the importance of BNF as a sustainable N source for plants. Through genome investigation, we demonstrated that some strains widely used as inoculants for BNF harbor the entire denitrification pathway to reduce nitrate to N2. Others contain none, or only some of the denitrification genes, resulting in complete absence of denitrification or production of intermediates such as NO2−, NO or N2O. Evidence of differential effects of bacterial strains on soil N2O were reported, but more studies are still needed to affirm crop inoculation can be a driver for source or sink of this gas. Finally, considerations were made about BNF as an indispensable resource to indirectly mitigate greenhouse gas emissions in agroecosystems.
Details
- Title
- The importance of denitrification performed by nitrogen-fixing bacteria used as inoculants in South America
- Authors/Creators
- J.E. Zilli (Author/Creator) - Brazilian Agricultural Research CorporationB.J.R. Alves (Author/Creator) - Brazilian Agricultural Research CorporationL.F.M. Rouws (Author/Creator) - Brazilian Agricultural Research CorporationJ.L. Simoes-Araujo (Author/Creator) - Brazilian Agricultural Research CorporationL.H. de Barros Soares (Author/Creator) - Brazilian Agricultural Research CorporationF. Cassán (Author/Creator) - National University of Río CuartoM.O. Castellanos (Author/Creator) - National University of Río CuartoG. O’Hara (Author/Creator) - Murdoch University
- Publication Details
- Plant and Soil, Vol.451, pp.5-24
- Publisher
- Kluwer Academic Publishers
- Identifiers
- 991005544189207891
- Copyright
- © 2019 Springer Nature Switzerland AG
- Murdoch Affiliation
- Centre for Rhizobium Studies
- Language
- English
- Resource Type
- Journal article
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Source: InCites
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.97 Plant Pathology
- 3.97.892 Rhizobium-Legume Symbiosis
- Web Of Science research areas
- Agronomy
- Plant Sciences
- Soil Science
- ESI research areas
- Agricultural Sciences