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Rhizosphere control of soil nitrogen cycling: a key component of plant economic strategies

Henneron, Ludovic and Kardol, Paul and Wardle, David and Cros, Camille and Fontaine, Sebastien (2020). Rhizosphere control of soil nitrogen cycling: a key component of plant economic strategies. New Phytologist. 228 , 1269-1282
[Journal article]

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Abstract

Understanding how plant species influence soil nutrient cycling is a major theme in terrestrial ecosystem ecology. However, the prevailing paradigm has mostly focused on litter decomposition, while rhizosphere effects on soil organic matter (SOM) decomposition have attracted little attention. Using a dual(13)C/N-15 labeling approach in a 'common garden' glasshouse experiment, we investigated how the economic strategies of 12 grassland plant species (graminoids, forbs and legumes) drive soil nitrogen (N) cycling via rhizosphere processes, and how this in turn affects plant N acquisition and growth. Acquisitive species with higher photosynthesis, carbon rhizodeposition and N uptake than conservative species induced a stronger acceleration of soil N cycling through rhizosphere priming of SOM decomposition. This allowed them to take up larger amounts of N and allocate it above ground to promote photosynthesis, thereby sustaining their faster growth. The N-2-fixation ability of legumes enhanced rhizosphere priming by promoting photosynthesis and rhizodeposition. Our study demonstrates that the economic strategies of plant species regulate a plant-soil carbon-nitrogen feedback operating through the rhizosphere. These findings provide novel mechanistic insights into how plant species with contrasting economic strategies sustain their nutrition and growth through regulating the cycling of nutrients by soil microbes in their rhizosphere.

Authors/Creators:Henneron, Ludovic and Kardol, Paul and Wardle, David and Cros, Camille and Fontaine, Sebastien
Title:Rhizosphere control of soil nitrogen cycling: a key component of plant economic strategies
Year of publishing :2020
Volume:228
Page range:1269-1282
Number of Pages:14
Publisher:WILEY
ISSN:0028-646X
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution-Noncommercial 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Botany
Keywords:decomposition, leaf and root traits, nutrient cycling, photosynthesis, plant economics spectrum, plant-soil interactions, rhizodeposition, rhizosphere priming effect
URN:NBN:urn:nbn:se:slu:epsilon-p-107115
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-107115
Additional ID:
Type of IDID
DOI10.1111/nph.16760
Web of Science (WoS)000550934300001
ID Code:18726
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Ecology and Management
Deposited By: SLUpub Connector
Deposited On:24 Nov 2020 16:43
Metadata Last Modified:15 Jan 2021 19:22

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