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Title: Microbe-iron interactions control lignin decomposition in soil

Journal Article · · Soil Biology and Biochemistry
 [1];  [2];  [3];  [4];  [3];  [5];  [3];  [6];  [1];  [3];  [7];  [1];  [1];  [8]
  1. Tsinghua University
  2. Iowa State University
  3. Northern Arizona University
  4. Zhejiang University
  5. Chinese Academy of Sciences
  6. University of Wisconsin-Madison
  7. North Carolina State University
  8. Cornell University

Lignin decomposition is critically linked to terrestrial carbon (C) cycle due to the enormous C mass of lignin and its importance in controlling overall rates of litter decomposition. Interactions between lignin and iron (Fe) minerals have been increasingly recognized as key mediators of lignin decomposition in experimental studies. However, we still lack a quantitative understanding of how Fe minerals interact with microbes to control lignin decomposition. Here, we leveraged experimental results from an incubation of Fe-rich soil, in which lignin decomposition rates were measured at aerobic conditions after four levels of pre-treated O2 availability, to examine microbe-Fe (MiFe) interactions in lignin decomposition with a MiFe model. We quantified how Fe redox cycling interacted with microbial activities to control lignin decomposition via data-model integration. Our results showed that the MiFe model with time-dependent growth and mortality functions better represented CO2 release from lignin decomposition (R2 ranging from 0.96 to 0.97) than models assuming either first-order or Michaelis-Menten kinetics. Reduction of Fe(III) to Fe(II) after pre-treatments with lower O2 availability stimu-lated the Fenton reaction to break down macro-molecular lignin into small molecules available to microbes. The small molecules of lignin and necromass bounded with oxidized Fe and were protected from decomposition. After 1-year incubation, the model implied that most of C stabilized with Fe minerals was derived from small molecular lignin C. Our quantitative analysis of microbe-Fe interactions sheds new light on lignin decomposition and preservation and helps improve model prediction of soil C persistence under global change.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1909809
Report Number(s):
PNNL-SA-179216
Journal Information:
Soil Biology and Biochemistry, Vol. 173
Country of Publication:
United States
Language:
English

References (66)

Simple three-pool model accurately describes patterns of long-term litter decomposition in diverse climates journal August 2008
Biochemical origin and refractory properties of humic acid extracted from maize plants: the contribution of lignin journal October 2006
A new look at the statistical model identification journal December 1974
Soil-carbon response to warming dependent on microbial physiology journal April 2010
Combining Biomarker with Stable Isotope Analyses for Assessing the Transformation and Turnover of Soil Organic Matter book January 2008
Aggregation controls the stability of lignin and lipids in clay-sized particulate and mineral associated organic matter journal February 2017
Lignin degradation during a laboratory incubation followed by 13C isotope analysis journal July 2008
Lignin Biosynthesis journal June 2003
Modelling the role of agriculture for the 20th century global terrestrial carbon balance journal March 2007
Multimodel Inference: Understanding AIC and BIC in Model Selection journal November 2004
Long-term straw decomposition in agro-ecosystems described by a unified three-exponentiation equation with thermal time journal September 2018
Impact of ecohydrological fluctuations on iron-redox cycling journal June 2019
Iron-mediated organic matter decomposition in humid soils can counteract protection journal May 2020
Influence of pO 2 on Iron Redox Cycling and Anaerobic Organic Carbon Mineralization in a Humid Tropical Forest Soil journal June 2018
The Joint UK Land Environment Simulator (JULES), model description – Part 2: Carbon fluxes and vegetation dynamics journal January 2011
Plant litter quality affects the accumulation rate, composition, and stability of mineral-associated soil organic matter journal October 2018
Formation of soil organic matter via biochemical and physical pathways of litter mass loss journal September 2015
The Microbial Efficiency-Matrix Stabilization (MEMS) framework integrates plant litter decomposition with soil organic matter stabilization: do labile plant inputs form stable soil organic matter? journal February 2013
Adsorption and Molecular Fractionation of Dissolved Organic Matter on Iron-Bearing Mineral Matrices of Varying Crystallinity journal January 2018
Iron-mediated mineralogical control of organic matter accumulation in tropical soils journal November 2017
Al/Fe Mineral Controls on Soil Organic Carbon Stock Across Tibetan Alpine Grasslands journal February 2019
Inference from Iterative Simulation Using Multiple Sequences journal November 1992
Rapid Iron Reduction Rates Are Stimulated by High-Amplitude Redox Fluctuations in a Tropical Forest Soil journal February 2017
An Adaptive Metropolis Algorithm journal April 2001
Iron oxidation stimulates organic matter decomposition in humid tropical forest soils journal July 2013
Lignin decomposition is sustained under fluctuating redox conditions in humid tropical forest soils journal April 2015
Iron addition to soil specifically stabilized lignin journal July 2016
Reactive oxygen species as agents of wood decay by fungi journal April 2002
Evaluation and improvement of a global land model against soil carbon data using a Bayesian Markov chain Monte Carlo method: Calibration of a carbon cycle model journal March 2014
Monte Carlo sampling methods using Markov chains and their applications journal April 1970
Enrichment of Lignin-Derived Carbon in Mineral-Associated Soil Organic Matter journal June 2019
Another look at measures of forecast accuracy journal October 2006
Simulating soil C dynamics with EPIC: Model description and testing against long-term data journal February 2006
Direct evidence for microbial-derived soil organic matter formation and its ecophysiological controls journal November 2016
Anaerobic microsites have an unaccounted role in soil carbon stabilization journal November 2017
Enzymatic "Combustion": The Microbial Degradation of Lignin journal October 1987
What is recalcitrant soil organic matter? journal January 2010
Mineral–Organic Associations: Formation, Properties, and Relevance in Soil Environments book December 2014
The effect of vertically resolved soil biogeochemistry and alternate soil C and N models on C dynamics of CLM4 journal January 2013
Long-term carbon storage through retention of dissolved aromatic acids by reactive particles in soil journal May 2012
Preservation of organic matter in sediments promoted by iron journal March 2012
Methods for estimating temperature sensitivity of soil organic matter based on incubation data: A comparative evaluation journal January 2015
Coordinated approaches to quantify long-term ecosystem dynamics in response to global change: LONG-TERM GLOBAL CHANGE EXPERIMENTS journal January 2011
Stabilization of organic matter in temperate soils: mechanisms and their relevance under different soil conditions - a review journal August 2006
Biodegradation and Stabilization after 2 Years of Specific Crop, Lignin, and Polysaccharide Carbons in Soils1 journal January 1980
XLV.—The Rate of Multiplication of Micro-organisms: A Mathematical Study journal January 1912
Equation of State Calculations by Fast Computing Machines journal June 1953
SOM genesis: microbial biomass as a significant source journal October 2011
Analysis of Factors Controlling Soil Organic Matter Levels in Great Plains Grasslands1 journal January 1987
Observations and modeling of biomass and soil organic matter dynamics for the grassland biome worldwide journal December 1993
Iron traps terrestrially derived dissolved organic matter at redox interfaces journal June 2013
Circumpolar assessment of permafrost C quality and its vulnerability over time using long-term incubation data journal October 2013
The implications of exoenzyme activity on microbial carbon and nitrogen limitation in soil: a theoretical model journal April 2003
Persistence of soil organic matter as an ecosystem property journal October 2011
Deep Learning Optimizes Data-Driven Representation of Soil Organic Carbon in Earth System Model Over the Conterminous United States journal June 2020
Fate of lignins in soils: A review journal August 2010
Oscillatory behavior of two nonlinear microbial models of soil carbon decomposition journal January 2014
Microorganisms pumping iron: anaerobic microbial iron oxidation and reduction journal October 2006
Global soil carbon projections are improved by modelling microbial processes journal July 2013
Contrasting evolution of iron phase composition in soils exposed to redox fluctuations journal August 2018
Microbial models with minimal mineral protection can explain long-term soil organic carbon persistence journal April 2019
Probabilistic inversion of a terrestrial ecosystem model: Analysis of uncertainty in parameter estimation and model prediction: PROBABILISTIC INVERSION OF TERRESTRIAL ECOSYSTEM journal May 2006
Soil properties control decomposition of soil organic carbon: Results from data-assimilation analysis journal January 2016
Rates of litter decomposition in terrestrial ecosystems: global patterns and controlling factors journal March 2008
Iron-bound organic carbon in forest soils: quantification and characterization journal January 2016
Modeling anaerobic soil organic carbon decomposition in Arctic polygon tundra: insights into soil geochemical influences on carbon mineralization journal January 2019