Microbial regulation of the soil carbon cycle: evidence from gene–enzyme relationships

Trivedi, Pankaj; Delgado-Baquerizo, Manuel; Trivedi, Chanda; Hu, Hangwei; Anderson, Ian C.; Jeffries, Thomas C.; Zhou, Jizhong; Singh, Brajesh K.

doi:10.1038/ismej.2016.65

Title: Microbial regulation of the soil carbon cycle: evidence from gene–enzyme relationships

Journal Article · Tue May 10 00:00:00 EDT 2016 · The ISME Journal

DOI:https://doi.org/10.1038/ismej.2016.65· OSTI ID:1567069

Trivedi, Pankaj ^[1]; Delgado-Baquerizo, Manuel ^[1]; Trivedi, Chanda ^[1]; Hu, Hangwei ^[2]; Anderson, Ian C. ^[1]; Jeffries, Thomas C. ^[1]; Zhou, Jizhong ^[3]; Singh, Brajesh K. ^[1]

Univ. of Western Sydney, NSW (Australia). Hawkesbury Inst. for the Environment
Univ. of Melbourne (Australia)
Univ. of Oklahoma, Norman, OK (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Tsinghua Univ., Beijing (China)

A deficit of empirical evidence for the microbial regulation of ecosystem processes, including carbon (C) degradation, hinders our ability to develop a framework to directly incorporate the genetic composition of microbial communities in the enzyme-driven Earth system models. Herein we evaluated the linkage between microbial functional genes and extracellular enzyme activity in soil samples collected across three geographical regions of Australia. We found a strong relationship between different functional genes and their corresponding enzyme activities. This relationship was maintained after considering microbial community structure, total C and soil pH using structural equation modelling. Findings showed that the variations in the activity of enzymes involved in C degradation were predicted by the functional gene abundance of the soil microbial community (R²>0.90 in all cases). Our results provide a strong framework for improved predictions on soil C dynamics that could be achieved by adopting a gene-centric approach incorporating the abundance of functional genes into process models.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1567069

Journal Information:: The ISME Journal, Vol. 10, Issue 11; ISSN 1751-7362

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 261 works

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