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Title: Inorganic N addition replaces N supplied to switchgrass ( Panicum virgatum ) by arbuscular mycorrhizal fungi

Journal Article · · Ecological Applications
DOI: https://doi.org/10.1002/eap.2047 · OSTI ID:1799678
 [1];  [2]
  1. Univ. of Wisconsin, Madison, WI (United States); Great Lakes Bioenergy Research Center (GLBRC), Madison, WI (United States); OSTI
  2. Univ. of Wisconsin, Madison, WI (United States); Great Lakes Bioenergy Research Center (GLBRC), Madison, WI (United States)

Arbuscular mycorrhizal fungi (AMF) provide many benefits in agroecosystems including improved soil tilth, carbon sequestration, and water and nutrient transfer to plants. AMF are known to affect plant nitrogen (N) dynamics and transfer N to plants, but there have been few studies addressing whether the amount of N transferred to plants by AMF is agronomically relevant. We used δ15N natural abundance methods and δ15N mass balance equations to estimate the amount of plant N derived from AMF transfer in perennial grasses managed for bioenergy production under different N addition treatments (0, 56, and 196 kg N/ha). Differentiation of δ15N among plant, soil N, and AMF pools was higher than anticipated leading to calculations of 34–55% of plant N transferred by AMF in the treatments receiving no N addition to 6–22% of plant N transferred to plants in high-N addition treatments. AMF extra-radical hyphae biomass was significantly reduced in the high-N (196 kg N/ha) addition treatments, which was negatively correlated to enriched plant δ15N. Our results suggest that N addition decreases AMF N transfer to plants. When N was limiting to plant growth, AMF supplied agronomically significant amounts of plant N, and a higher proportion of overall plant N. Because differentiation between N pools was greater than expected, stable isotope measurements can be used to estimate N transfer to AMF plant hosts.

Research Organization:
Battelle Memorial Institute, Columbus, OH (United States); University of Wisconsin, Madison, WI (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-76RL01830; FC02-07ER64494
OSTI ID:
1799678
Journal Information:
Ecological Applications, Journal Name: Ecological Applications Journal Issue: 2 Vol. 30; ISSN 1051-0761
Publisher:
Ecological Society of AmericaCopyright Statement
Country of Publication:
United States
Language:
English

References (59)

Data from: Inorganic N addition replaces N supplied to switchgrass (Panicum virgatum) by arbuscular mycorrhizal fungi dataset January 2019
Interspecific nutrient transfer in a tallgrass prairie plant community journal February 1996
Hyphal N transport by a vesicular-arbuscular mycorrhizal fungus associated with cucumber grown at three nitrogen levels journal March 1994
Correlations between foliar δ15N and nitrogen concentrations may indicate plant-mycorrhizal interactions journal February 2000
Agroecology: the key role of arbuscular mycorrhizas in ecosystem services journal August 2010
Global Distributions of Arbuscular Mycorrhizal Fungi journal March 2006
Natural Abundance of 15N in Nitrogen-Limited Forests and Tundra Can Estimate Nitrogen Cycling Through Mycorrhizal Fungi: A Review journal May 2008
Simulated Nitrogen Deposition Causes a Decline of Intra- and Extraradical Abundance of Arbuscular Mycorrhizal Fungi and Changes in Microbial Community Structure in Northern Hardwood Forests journal June 2010
Nitrogen Uptake by Trees and Mycorrhizal Fungi in a Successional Northern Temperate Forest: Insights from Multiple Isotopic Methods journal January 2013
Depleted 15N in hydrolysable-N of arctic soils and its implication for mycorrhizal fungi–plant interaction journal September 2009
Community traitscape of foliar nitrogen isotopes reveals N availability patterns in a tallgrass prairie journal February 2012
Insights into root growth, function, and mycorrhizal abundance from chemical and isotopic data across root orders journal October 2012
Arbuscular mycorrhiza and nitrogen: implications for individual plants through to ecosystems journal June 2014
Ecological interpretations of nitrogen isotope ratios of terrestrial plants and soils journal June 2015
Nitrogen conservation decreases with fertilizer addition in two perennial grass cropping systems for bioenergy journal June 2015
Mycorrhizal networks journal September 2009
Nutritional ecology of arbuscular mycorrhizal fungi journal November 2010
Nitrogen isotope fractionation during N uptake via arbuscular mycorrhizal and ectomycorrhizal fungi into grey alder journal October 2016
Controls over mycorrhizal uptake of organic nitrogen journal May 2010
Nitrogen conservation strategies of cranberry plants and ericoid mycorrhizal fungi in an agroecosystem journal November 2008
Arbuscular mycorrhiza and soil nitrogen cycling journal March 2012
Controls of isotopic patterns in saprotrophic and ectomycorrhizal fungi journal May 2012
Tracking the carbon source of arbuscular mycorrhizal fungi colonizing C3 and C4 plants using carbon isotope ratios (δ13C) journal March 2013
Species-dependent partitioning of C and N stable isotopes between arbuscular mycorrhizal fungi and their C3 and C4 hosts journal March 2015
N addition undermines N supplied by arbuscular mycorrhizal fungi to native perennial grasses journal January 2018
Nitrogen transfer in the arbuscular mycorrhizal symbiosis journal June 2005
Estimation of the biomass and seasonal growth of external mycelium of ectomycorrhizal fungi in the field journal September 2001
Assimilation and isotopic fractionation of nitrogen by mycorrhizal fungi journal August 2001
Nitrogen availability and colonization by mycorrhizal fungi correlate with nitrogen isotope patterns in plants journal January 2003
13 C and 15 N isotopic fractionation in trees, soils and fungi in a natural forest stand and a Norway spruce plantation journal May 2007
Resource limitation is a driver of local adaptation in mycorrhizal symbioses journal January 2010
Carbon availability triggers fungal nitrogen uptake and transport in arbuscular mycorrhizal symbiosis journal January 2012
The Biology and Agronomy of Switchgrass for Biofuels journal September 2005
Assessing the Nitrogen-15 Concentration of Plant-Available Soil Nitrogen journal December 2004
Soil biota enhance agricultural sustainability by improving crop yield, nutrient uptake and reducing nitrogen leaching losses journal October 2014
Nitrogen input mediates the effect of free-air CO 2 enrichment on mycorrhizal fungal abundance: MYCORRHIZAS AND ELEVATED CO 2 journal September 2004
Socialism in soil? The importance of mycorrhizal fungal networks for facilitation in natural ecosystems journal November 2009
Arbuscular mycorrhizae and terrestrial ecosystem processes journal August 2004
A meta-analysis of mycorrhizal responses to nitrogen, phosphorus, and atmospheric CO2 in field studies journal July 2004
Measuring external mycelia production of ectomycorrhizal fungi in the field: the soil matrix matters journal July 2006
The mycorrhizal contribution to plant productivity, plant nutrition and soil structure in experimental grassland journal December 2006
Global patterns of foliar nitrogen isotopes and their relationships with climate, mycorrhizal fungi, foliar nutrient concentrations, and nitrogen availability journal September 2009
Nitrogen isotopes link mycorrhizal fungi and plants to nitrogen dynamics journal August 2012
Mycorrhizal-mediated nitrogen acquisition in switchgrass under elevated temperatures and N enrichment journal October 2011
Networks of power and influence: the role of mycorrhizal mycelium in controlling plant communities and agroecosystem functioning journal August 2004
Roles of Arbuscular Mycorrhizas in Plant Nutrition and Growth: New Paradigms from Cellular to Ecosystem Scales journal June 2011
Stable Isotopes in Plant Ecology journal November 2002
Nitrogen in Agriculture: Balancing the Cost of an Essential Resource journal November 2009
Associative nitrogen fixation (ANF) in switchgrass (Panicum virgatum) across a nitrogen input gradient journal June 2018
Nitrogen Enrichment Alters Mycorrhizal Allocation at five Mesic to Semiarid Grasslands journal July 2003
15 N IN SYMBIOTIC FUNGI AND PLANTS ESTIMATES NITROGEN AND CARBON FLUX RATES IN ARCTIC TUNDRA journal April 2006
The biogeochemistry of bioenergy landscapes: carbon, nitrogen, and water considerations journal June 2011
Increasing plant use of organic nitrogen with elevation is reflected in nitrogen uptake rates and ecosystem δ 15 N journal April 2011
Plant–microbial linkages and ecosystem nitrogen retention: lessons for sustainable agriculture journal May 2012
Agricultural practices indirectly influence plant productivity and ecosystem services through effects on soil biota journal October 2014
Biomass Production in Switchgrass across the United States: Database Description and Determinants of Yield journal January 2010
Tradeoffs in Biomass and Nutrient Allocation in Prairies and Corn Managed for Bioenergy Production journal January 2012
The Vegetation N:P Ratio: a New Tool to Detect the Nature of Nutrient Limitation journal December 1996
Data from: Inorganic N addition replaces N supplied to switchgrass (Panicum virgatum) by arbuscular mycorrhizal fungi dataset January 2019

Cited By (2)