Charcoal Disrupts Soil Microbial Communication through a Combination of Signal Sorption and Hydrolysis

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dc.citation.firstpage226en_US
dc.citation.issueNumber2en_US
dc.citation.journalTitleACS Omegaen_US
dc.citation.lastpage233en_US
dc.citation.volumeNumber1en_US
dc.contributor.authorGao, Xiaodongen_US
dc.contributor.authorCheng, Hsiao-Yingen_US
dc.contributor.authorDel Valle, Ilenneen_US
dc.contributor.authorLiu, Shirleyen_US
dc.contributor.authorMasiello, Caroline A.en_US
dc.contributor.authorSilberg, Jonathan J.en_US
dc.date.accessioned2016-09-30T20:52:22Zen_US
dc.date.available2016-09-30T20:52:22Zen_US
dc.date.issued2016en_US
dc.description.abstractThe presence of charcoal in soil triggers a range of biological effects that are not yet predictable, in part because it interferes with the functioning of chemical signals that microbes release into their environment to communicate. We do not fully understand the mechanisms by which charcoal alters the biologically available concentrations of these intercellular signals. Recently, charcoal has been shown to sorb the signaling molecules that microbes release, rendering them ineffective for intercellular communication. Here, we investigate a second, potentially more important mechanism of interference: signaling-molecule hydrolysis driven by charcoal-induced soil pH changes. We examined the effects of 10 charcoals on the bioavailable concentration of an acyl-homoserine lactone (AHL) used by many Gram-negative bacteria for cell–cell communication. We show that charcoals decrease the level of bioavailable AHL through sorption and pH-dependent hydrolysis of the lactone ring. We then built a quantitative model that predicts the half-lives of different microbial signaling compounds in the presence of charcoals varying in pH and surface area. Our model results suggest that the chemical effects of charcoal on pH-sensitive bacterial AHL signals will be fundamentally distinct from effects on pH-insensitive fungal signals, potentially leading to shifts in microbial community structures.en_US
dc.identifier.citationGao, Xiaodong, Cheng, Hsiao-Ying, Del Valle, Ilenne, et al.. "Charcoal Disrupts Soil Microbial Communication through a Combination of Signal Sorption and Hydrolysis." <i>ACS Omega,</i> 1, no. 2 (2016) American Chemical Society: 226-233. http://dx.doi.org/10.1021/acsomega.6b00085.en_US
dc.identifier.doihttp://dx.doi.org/10.1021/acsomega.6b00085en_US
dc.identifier.urihttps://hdl.handle.net/1911/91642en_US
dc.language.isoengen_US
dc.publisherAmerican Chemical Societyen_US
dc.rightsThis is an open access article published under an ACS AuthorChoiceﾠLicense, which permits copying and redistribution of the article or any adaptations for non-commercial purposes.en_US
dc.rights.urihttp://pubs.acs.org/page/policy/authorchoice_termsofuse.htmlen_US
dc.titleCharcoal Disrupts Soil Microbial Communication through a Combination of Signal Sorption and Hydrolysisen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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