Functional Potential of Soil Microbial Communities in the Maize Rhizosphere

Microbial communities in the rhizosphere make significant contributions to crop health and nutrient cycling. However, their ability to perform important biogeochemical processes remains uncharacterized. Here, we identified important functional genes that characterize the rhizosphere microbial commun...

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Main Authors:	Li, Xiangzhen, Rui, Junpeng, Xiong, Jingbo, Li, Jiabao, He, Zhili, Zhou, Jizhong, Yannarell, Anthony C., Mackie, Roderick I.
Format:	Online
Language:	English
Published:	Public Library of Science 2014
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4226563/

id	pubmed-4226563
recordtype	oai_dc
spelling	pubmed-42265632014-11-13 Functional Potential of Soil Microbial Communities in the Maize Rhizosphere Li, Xiangzhen Rui, Junpeng Xiong, Jingbo Li, Jiabao He, Zhili Zhou, Jizhong Yannarell, Anthony C. Mackie, Roderick I. Research Article Microbial communities in the rhizosphere make significant contributions to crop health and nutrient cycling. However, their ability to perform important biogeochemical processes remains uncharacterized. Here, we identified important functional genes that characterize the rhizosphere microbial community to understand metabolic capabilities in the maize rhizosphere using the GeoChip-based functional gene array method. Significant differences in functional gene structure were apparent between rhizosphere and bulk soil microbial communities. Approximately half of the detected gene families were significantly (p<0.05) increased in the rhizosphere. Based on the detected gyrB genes, Gammaproteobacteria, Betaproteobacteria, Firmicutes, Bacteroidetes and Cyanobacteria were most enriched in the rhizosphere compared to those in the bulk soil. The rhizosphere niche also supported greater functional diversity in catabolic pathways. The maize rhizosphere had significantly enriched genes involved in carbon fixation and degradation (especially for hemicelluloses, aromatics and lignin), nitrogen fixation, ammonification, denitrification, polyphosphate biosynthesis and degradation, sulfur reduction and oxidation. This research demonstrates that the maize rhizosphere is a hotspot of genes, mostly originating from dominant soil microbial groups such as Proteobacteria, providing functional capacity for the transformation of labile and recalcitrant organic C, N, P and S compounds. Public Library of Science 2014-11-10 /pmc/articles/PMC4226563/ /pubmed/25383887 http://dx.doi.org/10.1371/journal.pone.0112609 Text en © 2014 Li et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Li, Xiangzhen Rui, Junpeng Xiong, Jingbo Li, Jiabao He, Zhili Zhou, Jizhong Yannarell, Anthony C. Mackie, Roderick I.
spellingShingle	Li, Xiangzhen Rui, Junpeng Xiong, Jingbo Li, Jiabao He, Zhili Zhou, Jizhong Yannarell, Anthony C. Mackie, Roderick I. Functional Potential of Soil Microbial Communities in the Maize Rhizosphere
author_facet	Li, Xiangzhen Rui, Junpeng Xiong, Jingbo Li, Jiabao He, Zhili Zhou, Jizhong Yannarell, Anthony C. Mackie, Roderick I.
author_sort	Li, Xiangzhen
title	Functional Potential of Soil Microbial Communities in the Maize Rhizosphere
title_short	Functional Potential of Soil Microbial Communities in the Maize Rhizosphere
title_full	Functional Potential of Soil Microbial Communities in the Maize Rhizosphere
title_fullStr	Functional Potential of Soil Microbial Communities in the Maize Rhizosphere
title_full_unstemmed	Functional Potential of Soil Microbial Communities in the Maize Rhizosphere
title_sort	functional potential of soil microbial communities in the maize rhizosphere
description	Microbial communities in the rhizosphere make significant contributions to crop health and nutrient cycling. However, their ability to perform important biogeochemical processes remains uncharacterized. Here, we identified important functional genes that characterize the rhizosphere microbial community to understand metabolic capabilities in the maize rhizosphere using the GeoChip-based functional gene array method. Significant differences in functional gene structure were apparent between rhizosphere and bulk soil microbial communities. Approximately half of the detected gene families were significantly (p<0.05) increased in the rhizosphere. Based on the detected gyrB genes, Gammaproteobacteria, Betaproteobacteria, Firmicutes, Bacteroidetes and Cyanobacteria were most enriched in the rhizosphere compared to those in the bulk soil. The rhizosphere niche also supported greater functional diversity in catabolic pathways. The maize rhizosphere had significantly enriched genes involved in carbon fixation and degradation (especially for hemicelluloses, aromatics and lignin), nitrogen fixation, ammonification, denitrification, polyphosphate biosynthesis and degradation, sulfur reduction and oxidation. This research demonstrates that the maize rhizosphere is a hotspot of genes, mostly originating from dominant soil microbial groups such as Proteobacteria, providing functional capacity for the transformation of labile and recalcitrant organic C, N, P and S compounds.
publisher	Public Library of Science
publishDate	2014
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4226563/
_version_	1613154505613901824

Functional Potential of Soil Microbial Communities in the Maize Rhizosphere

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