Biochar influence the production and release of exopolysaccharides on plant growth promoting bacteria

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dc.contributor.authorBueno, Carolina C. [UNESP]
dc.contributor.authorFraceto, Leonardo F. [UNESP]
dc.contributor.authorRosa, André H. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-12-11T17:37:35Z
dc.date.available2018-12-11T17:37:35Z
dc.date.issued2018-01-01
dc.description.abstractBiochar is known as a multifunctional carbonaceous material mainly used in agrosystems. Little information is available on possible antagonistic, toxicological and negative effects of biochar on soil microorganisms. This work explored the effects of different doses of biochar produced from sugarcane bagasse and corn cob husk in the growth and development of plant growth promoting bacteria (Leocobacter sp. and Bacillus aryabhattai). Two types of low-dose solid culture media of biochar (0.4% w w-1) were tested: biochar directly inserted into the medium and another one elaborated with the biochars extractable water compounds. The growth results indicated a deleterious effect on the survival of the colonies when in direct contact with the extractable compounds in water of the biochars. On the other hand, the strains grown in solid medium supplemented with biochar (high and low-dose) had some outbreaks with colonies of bacteria, where there was also the formation of exopolysaccharide films. The production of exopolysaccharides by Bacillus sp. was characterized by infrared chemical mapping at the nanoscale (AFM NANO-IR). The information obtained indicated that the dosage and the type of biochar modified the morphology and topography of the biofilms, as well as the presence of chemical groups such as Amide I and II, lipids and proteins. This fact suggests that adaptation and survival of the bacterial species depend on their interaction path with the molecular structure of the biochar surface. Thus, the binding force, or even biochar colonization, can be influenced by the type of dominant molecule readily available on the surface of the biochar, where hydrophobic components, covalent bonds, van der Waals forces, anionic or cation exchange or even substitution of ion can act as chemical signals that induce specific responses in bacteria.en
dc.description.affiliationSão Paulo State University (UNESP) Institute of Science and Technology, Av. Três de Março, 511
dc.description.affiliationUnespSão Paulo State University (UNESP) Institute of Science and Technology, Av. Três de Março, 511
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 2013/08373-0
dc.description.sponsorshipIdFAPESP: 2013/24168-8
dc.description.sponsorshipIdFAPESP: 2016/08215-4
dc.format.extent823-828
dc.identifierhttp://dx.doi.org/10.3303/CET1865138
dc.identifier.citationChemical Engineering Transactions, v. 65, p. 823-828.
dc.identifier.doi10.3303/CET1865138
dc.identifier.issn2283-9216
dc.identifier.scopus2-s2.0-85049299622
dc.identifier.urihttp://hdl.handle.net/11449/179992
dc.language.isoeng
dc.relation.ispartofChemical Engineering Transactions
dc.relation.ispartofsjr0,293
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.titleBiochar influence the production and release of exopolysaccharides on plant growth promoting bacteriaen
dc.typeArtigo
unesp.author.lattes5228846314663888[3]
unesp.author.orcid0000-0002-2042-018X[3]

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