Open Access
Rhizosphere Priming: a Nutrient Perspective
Feike A. Dijkstra,Yolima Carrillo,Elise Pendall,Jack A. Morgan +3 more
- Vol. 2013
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TLDR
It is postulate that rhizosphere priming may enhance N supply to plants in systems that are N limited, but thatrhizospherePriming may not occur in Systems that are phosphorus (P) limited, because under P limitation, rhizodeposition may be used for mobilization of P, rather than for decomposition of SOM.Abstract:
Rhizosphere priming is the change in decomposition of soil organic matter (SOM) caused by root activity. Rhizosphere priming plays a crucial role in soil carbon (C) dynamics and their response to global climate change. Rhizosphere priming may be affected by soil nutrient availability, but rhizosphere priming itself can also affect nutrient supply to plants. These interactive effects may be of particular relevance in understanding the sustained increase in plant growth and nutrient supply in response to a rise in atmospheric CO2 concentration. We examined how these interactions were affected by elevated CO2 in two similar semiarid grassland field studies. We found that an increase in rhizosphere priming enhanced the release of nitrogen (N) through decomposition of a larger fraction of SOM in one study, but not in the other. We postulate that rhizosphere priming may enhance N supply to plants in systems that are N limited, but that rhizosphere priming may not occur in systems that are phosphorus (P) limited. Under P limitation, rhizodeposition may be used for mobilisation of P, rather than for decomposition of SOM. Therefore, with increasing atmospheric CO2 concentrations, rhizosphere priming may play a larger role in affecting C sequestration in N poor than in P poor soils.read more
Citations
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Journal ArticleDOI
Fine roots stimulate nutrient release during early stages of leaf litter decomposition in a Central Amazon rainforest
Nathielly Martins,Lucia Fuchslueger,Lucia Fuchslueger,Katrin Fleischer,Katrin Fleischer,Kelly M. Andersen,Rafael L. Assis,Rafael L. Assis,Fabricio Beggiato Baccaro,Plínio Barbosa de Camargo,Amanda L. Cordeiro,Amanda L. Cordeiro,Adriana Grandis,Iain P. Hartley,Florian Hofhansl,Laynara F. Lugli,David M. Lapola,Juliane Menezes,Richard J. Norby,Anja Rammig,Jessica S. Rosa,Karst J. Schaap,Karst J. Schaap,Bruno Takeshi,Oscar J. Valverde-Barrantes,Carlos A. Quesada +25 more
TL;DR: In this paper, fine roots stimulate decomposition and nutrient release from leaf litter biochemically by releasing enzymes, and by exuding labile carbon stimulating microbial decomposers in the Amazon rainforest.
Journal ArticleDOI
Form of nitrogen deposition affects soil organic matter priming by glucose and cellulose
TL;DR: In this paper, the authors examined the interplay of C and N availability and found that organic N deposition decreased the priming effect of easily available glucose but increased the effect of cellulose.
Journal ArticleDOI
Mechanisms of rhizosphere priming effects and their ecological significance
TL;DR: This paper first put forward a mechanism underlying the occurrence of rhizosphere priming effects, and then examined the biotic and abiotic factors influencing the RhizospherePriming effects.
Journal ArticleDOI
Primed N2O emission from native soil nitrogen: A 15N‐tracing laboratory experiment
Book ChapterDOI
Applications and Mechanisms of Plant Growth-Stimulating Rhizobacteria
Prem Chandra,Enespa Singh +1 more
TL;DR: The advantageous rhizospheric bacteria of the plant may reduce the comprehensive dependency on hazardous agronomic compounds which disrupt the agro-biota.
References
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Book Chapter
Changes in Atmospheric Constituents and in Radiative Forcing
Piers M. Forster,Venkatachalam Ramaswamy,Paulo Artaxo,Terje Koren Berntsen,Richard Betts,David W. Fahey,Jim Haywood,Judith Lean,David C. Lowe,Gunnar Myhre,John Nganga,Ronald G. Prinn,Graciela B. Raga,Michael Schulz,Rob van Dorland,Greg Bodeker,Oliver Boucher,William D. Collins,T.J. Conway,Edward J. Dlugokencky,James W. Elkins,David Etheridge,P. Foukal,Paul J. Fraser,Marvyn Geller,Fortunat Joos,Charles D. Keeling,Stefan Kinne,K. Lassey,Ulrike Lohmann,Andrew C. Manning,S. A. Montzka,David E. Oram,K. O'Shaughnessy,S. Piper,Gian-Kasper Plattner,Michael Ponater,Navin Ramankutty,G. Reid,David Rind,Karen H. Rosenlof,Robert Sausen,D. Schwarzkopf,S.K. Solanki,Garry Stenchikov,N. Stuber,Toshihiko Takemura,Christiane Textor,R. Wang,Ray F. Weiss,T. Whorf +50 more
Journal ArticleDOI
Global analysis of nitrogen and phosphorus limitation of primary producers in freshwater, marine and terrestrial ecosystems.
James J. Elser,Matthew E. S. Bracken,Elsa E. Cleland,Daniel S. Gruner,W. Stanley Harpole,Helmut Hillebrand,Jacqueline T. Ngai,Eric W. Seabloom,Jonathan B. Shurin,Jennifer E. Smith +9 more
TL;DR: A large-scale meta-analysis of experimental enrichments shows that P limitation is equally strong across these major habitats and that N and P limitation are equivalent within both terrestrial and freshwater systems.
Journal ArticleDOI
Nitrogen limitation on land and in the sea: How can it occur?
TL;DR: In this paper, the authors examine both how the biogeochemistry of the nitrogen cycle could cause limitation to develop, and how nitrogen limitation could persist as a consequence of processes that prevent or reduce nitrogen fixation.
Journal ArticleDOI
The fate of phosphorus during pedogenesis
TL;DR: The fate of phosphorus during pedogenesis is considered with particular emphasis on vertical distribution within the profile Information is based on P fractionation studies involving a range of soil sequences in New Zealand forms of P in soil parent materials are discussed in relation to soil P transformations as discussed by the authors.