Plant roots alter microbial functional genes supporting root litter decomposition
Abstract
Decomposition of soil organic carbon is central to the global carbon cycle and profoundly affected by plant roots. While root “priming” of decomposition has been extensively investigated, it is not known how plants alter the molecular ecology of soil microbial decomposers. We disentangled the effects of Avena fatua, a common annual grass, on 13C-labeled root litter decomposition and quantified multiple genetic characteristics of soil bacterial and fungal communities. In our study, plants consistently suppressed rates of root litter decomposition. Microbes from planted soils had relatively more genes coding for low molecular weight compound degradation enzymes, while those from unplanted had more macromolecule degradation genes. Higher abundances of “water stress” genes in planted soils suggested that microbes experienced plant-induced water stress. We developed a conceptual model based on Mantel analyses of our extensive data set. This model indicates that plant root effects on the multiple soil environmental and microbial mechanisms involved in root litter decomposition act through changing the functional gene profiles of microbial decomposers living near plant roots.
- Authors:
-
- Univ. of California, Berkeley, CA (United States); Univ. of Oklahoma, Norman, OK (United States)
- Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Univ. of Oklahoma, Norman, OK (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Univ. of Oklahoma, Norman, OK (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Tsinghua Univ., Beijing (China)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1526178
- Alternate Identifier(s):
- OSTI ID: 1636111
- Report Number(s):
- LLNL-JRNL-671996
Journal ID: ISSN 0038-0717; 794212
- Grant/Contract Number:
- AC52-07NA27344; SC0004730; SC0010570; 00008322; SCW1060; SCW142
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Soil Biology and Biochemistry
- Additional Journal Information:
- Journal Volume: 127; Journal Issue: C; Journal ID: ISSN 0038-0717
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES
Citation Formats
Shi, Shengjing, Herman, Donald J., He, Zhili, Pett-Ridge, Jennifer, Wu, Liyou, Zhou, Jizhong, and Firestone, Mary K. Plant roots alter microbial functional genes supporting root litter decomposition. United States: N. p., 2018.
Web. doi:10.1016/j.soilbio.2018.09.013.
Shi, Shengjing, Herman, Donald J., He, Zhili, Pett-Ridge, Jennifer, Wu, Liyou, Zhou, Jizhong, & Firestone, Mary K. Plant roots alter microbial functional genes supporting root litter decomposition. United States. doi:10.1016/j.soilbio.2018.09.013.
Shi, Shengjing, Herman, Donald J., He, Zhili, Pett-Ridge, Jennifer, Wu, Liyou, Zhou, Jizhong, and Firestone, Mary K. Tue .
"Plant roots alter microbial functional genes supporting root litter decomposition". United States. doi:10.1016/j.soilbio.2018.09.013. https://www.osti.gov/servlets/purl/1526178.
@article{osti_1526178,
title = {Plant roots alter microbial functional genes supporting root litter decomposition},
author = {Shi, Shengjing and Herman, Donald J. and He, Zhili and Pett-Ridge, Jennifer and Wu, Liyou and Zhou, Jizhong and Firestone, Mary K.},
abstractNote = {Decomposition of soil organic carbon is central to the global carbon cycle and profoundly affected by plant roots. While root “priming” of decomposition has been extensively investigated, it is not known how plants alter the molecular ecology of soil microbial decomposers. We disentangled the effects of Avena fatua, a common annual grass, on 13C-labeled root litter decomposition and quantified multiple genetic characteristics of soil bacterial and fungal communities. In our study, plants consistently suppressed rates of root litter decomposition. Microbes from planted soils had relatively more genes coding for low molecular weight compound degradation enzymes, while those from unplanted had more macromolecule degradation genes. Higher abundances of “water stress” genes in planted soils suggested that microbes experienced plant-induced water stress. We developed a conceptual model based on Mantel analyses of our extensive data set. This model indicates that plant root effects on the multiple soil environmental and microbial mechanisms involved in root litter decomposition act through changing the functional gene profiles of microbial decomposers living near plant roots.},
doi = {10.1016/j.soilbio.2018.09.013},
journal = {Soil Biology and Biochemistry},
number = C,
volume = 127,
place = {United States},
year = {2018},
month = {9}
}
Web of Science
Figures / Tables:

Works referencing / citing this record:
Plant presence reduces root and shoot litter decomposition rates of crops and wild relatives
journal, March 2019
- Barel, Janna M.; Kuyper, Thomas W.; de Boer, Wietse
- Plant and Soil, Vol. 438, Issue 1-2
Plant presence reduces root and shoot litter decomposition rates of crops and wild relatives
journal, March 2019
- Barel, Janna M.; Kuyper, Thomas W.; de Boer, Wietse
- Plant and Soil, Vol. 438, Issue 1-2
Massively parallel screening of synthetic microbial communities
journal, June 2019
- Kehe, Jared; Kulesa, Anthony; Ortiz, Anthony
- Proceedings of the National Academy of Sciences, Vol. 116, Issue 26
Simulating metagenomic stable isotope probing datasets with MetaSIPSim
journal, January 2020
- Barnett, Samuel E.; Buckley, Daniel H.
- BMC Bioinformatics, Vol. 21, Issue 1
Figures / Tables found in this record: