Rhizosphere priming: a nutrient perspective

By F. Dijkstra, Y. Carrillo, Elise Pendall, J. Morgan. Frontiers in Microbiology, 2013

597 citations recorded by the source corpus.

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 mobilization 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.

Subfields: Ecology, Plant Science, Soil Science

View Paper: https://www.semanticscholar.org/paper/2975c27795b3832bd80645774eef1a1b5eeb1a9b

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Ecology

1. J. Gutknecht
2. M. Firestone
3. W. Cheng
4. S. Fontaine
5. S. Barot
6. Noah Fierer
7. Y. Kuzyakov
8. E. Blagodatskaya

In Plant Science

1. J. Gutknecht
2. D. Herman
3. Claire Chenu
4. B. Zhu
5. M. Firestone
6. W. Cheng
7. D. Keck

In Soil Science

1. B. Zhu
2. M. Firestone
3. D. Herman
4. J. Gutknecht
5. D. Keck
6. Claire Chenu
7. W. Cheng
8. S. Fontaine

Citations in the corpus

• Rhizosphere priming effects on soil carbon and nitrogen mineralization (2014, background): “A potential mechanism is related to microbial N mining (Kuzyakov, 2002; Cheng and Kuzyakov, 2005; Craine et al., 2007; Fontaine et al., 2011; Dijkstra et al., 2013).”
• Contribution of exudates, arbuscular mycorrhizal fungi and litter depositions to the rhizosphere priming effect induced by grassland species (2015, background): “Given that these exudates drive the SOM mineralization and thereby the release of mineral N (Phillips et al., 2011; Dijkstra et al., 2013), the plant might finely adjust its own N supply to the potential growth offered by its environment (e.”
• Rhizosphere priming effect: A meta-analysis (2017, unknown): “General reviews or syntheses on the RPE have recently been published (Dijkstra et al., 2013; Cheng et al., 2014; Finzi et al., 2015).”
• Root-induced changes in nutrient cycling in forests depend on exudation rates (2014, unknown): “Such a strategy would be particularly viable in stands where co-occurring tree species have both scavenging and mining nutrient acquisition strategies (Smith and Read, 2008; Lambers et al., 2009; Dijkstra et al., 2013 ).”