Document Detail

Application of natural blends of phytochemicals derived from the root exudates of Arabidopsis to the soil reveal that phenolic-related compounds predominantly modulate the soil microbiome.
MedLine Citation:
PMID:  23293028     Owner:  NLM     Status:  MEDLINE    
The roots of plants have the ability to influence its surrounding microbiology, the so-called rhizosphere microbiome, through the creation of specific chemical niches in the soil mediated by the release of phytochemicals. Here we report how these phytochemicals could modulate the microbial composition of a soil in the absence of the plant. For this purpose, root exudates of Arabidopsis were collected and fractionated to obtain natural blends of phytochemicals at various relative concentrations that were characterized by GC-MS and applied repeatedly to a soil. Soil bacterial changes were monitored by amplifying and pyrosequencing the 16 S ribosomal small subunit region. Our analyses reveal that one phytochemical can culture different operational taxonomic units (OTUs), mixtures of phytochemicals synergistically culture groups of OTUs, and the same phytochemical can act as a stimulator or deterrent to different groups of OTUs. Furthermore, phenolic-related compounds showed positive correlation with a higher number of unique OTUs compared with other groups of compounds (i.e. sugars, sugar alcohols, and amino acids). For instance, salicylic acid showed positive correlations with species of Corynebacterineae, Pseudonocardineae and Streptomycineae, and GABA correlated with species of Sphingomonas, Methylobacterium, Frankineae, Variovorax, Micromonosporineae, and Skermanella. These results imply that phenolic compounds act as specific substrates or signaling molecules for a large group of microbial species in the soil.
Dayakar V Badri; Jacqueline M Chaparro; Ruifu Zhang; Qirong Shen; Jorge M Vivanco
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2013-01-04
Journal Detail:
Title:  The Journal of biological chemistry     Volume:  288     ISSN:  1083-351X     ISO Abbreviation:  J. Biol. Chem.     Publication Date:  2013 Feb 
Date Detail:
Created Date:  2013-02-18     Completed Date:  2013-04-29     Revised Date:  2014-02-18    
Medline Journal Info:
Nlm Unique ID:  2985121R     Medline TA:  J Biol Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  4502-12     Citation Subset:  IM    
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MeSH Terms
Amino Acids / chemistry
Arabidopsis / metabolism*
Carbohydrates / chemistry
Cluster Analysis
DNA / metabolism
Gas Chromatography-Mass Spectrometry / methods
Phenol / chemistry*
Phytotherapy / methods*
Plant Roots / metabolism
Plants / metabolism
Sequence Analysis, DNA
Signal Transduction
Soil / chemistry*
Soil Microbiology*
Reg. No./Substance:
0/Amino Acids; 0/Carbohydrates; 0/Soil; 339NCG44TV/Phenol; 9007-49-2/DNA
Erratum In:
J Biol Chem. 2013 Oct 18;288(42):30503

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