EPSCoR - Alaska Adapting to Changing Environments

EPSCoR - Alaska Adapting to Changing Environments

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Synergistic degradation of lignocellulose by fungi and bacteria in boreal forest soil

Boreal forests contain an estimated 28% of the world's soil carbon, and currently act as a significant global carbon sink. Plant-derived lignocellulose is a major component of soil carbon, and its decomposition is dependent on soil bacteria and fungi. In order to predict the fate of this soil carbon and its potential feedbacks to climate change, the identities, activity, and interactions of soil microbial decomposer communities must be better understood. This study used stable isotope probing (SIP) with ¹³C-labeled lignocellulose and two of its constituents, cellulose and vanillin, to identify microbes responsible for the processing of lignocellulose-derived carbon and examine the specific roles that they perform. Results indicate that multiple taxa are involved in lignocellulose processing, and that certain taxa target specific portions of the lignocellulose macromolecule; specifically, fungi dominate the degradation of lignocellulose and cellulose macromolecules, while bacteria scavenge aromatic lignocellulose monomers. Major fungal taxa involved in lignocellulose degradation include Ceratobasidium, Geomyces, and Sebacina, among others. Bacterial taxa processing lignocellulose and cellulose included Cellvibrio and Mesorhizobium in high abundance relative to other taxa, although Burkholderia were the primary vanillin consumers. These results elucidate some of the major players in lignocellulose decomposition and their specific roles in boreal forest soil. This information provides knowledge of small-scale microbial processes that dictate ecosystem-level carbon cycling, and can assist in predictions of the fate of boreal forest carbon stocks.

Data and Resources

  • View website
    Website :: Publisher's website

    https://scholarworks.alaska.edu/handle/11122/6073

Status: Complete
Type: Project
Data Types: Report
Primary Contact
Clucas, Tania
Email: thclucas@alaska.edu
Primary Agency
EPSCoR - Alaska Adapting to Changing Environments
Type
Academic

Funding Agency
EPSCoR - Alaska Adapting to Changing Environments
Type
Academic

Other Agencies
National Science Foundation

ISO Topics
climatologyMeteorologyAtmosphere

Geo-keywords
Alaska

Direct Record Link
http://epscor.portal.gina.alaska.edu/catalogs/11804-synergistic-degradation-of-lignocellulose-by-fu
  • 01c8ceef3d596f40f05bf496ca00d929
    Published by Lisa
    2016-11-17 14:11:56 -0900
  • 01c8ceef3d596f40f05bf496ca00d929
    Updated by Lisa
    2016-11-17 14:01:11 -0900
  • A01710a84bb2b48878decca075ee597f
    Updated by Patrick
    2016-11-10 13:58:45 -0900
  • A01710a84bb2b48878decca075ee597f
    New record created
    2016-11-10 13:58:14 -0900
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