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Selection of metal resistant plant growth promoting rhizobacteria for the growth and metal accumulation of energy maize in a mine soil — Effect of the inoculum size

2016Journal article Restricted access
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dc.contributor.authorMoreira, Helena
dc.contributor.authorPereira, Sofia I. A.
dc.contributor.authorMarques, Ana P. G. C.
dc.contributor.authorRangel, António O. S. S.
dc.contributor.authorCastro, Paula M. L.
dc.date.accessioned2017-10-13T19:01:10Z
dc.date.available2017-10-13T19:01:10Z
dc.date.issued2016
dc.description.abstractHeavy metals, such as Cd and Zn, are spilled in soils by several anthropogenic sources, including mining activities. Their toxic effects can be minimized using plants especially when paired with plant growth promoting rhizobacteria (PGPR), under phytomanagement strategies. Several factors can contribute to the failure of rhizobacterial inoculation, such as bacteria selection and the inoculum size. In this work five metal resistant PGPR (Ralstonia eutropha 1C2, Chryseobacterium humi ECP37, Pseudomonas fluorescens S3X, Rhizobium radiobacter EC1B and Pseudomonas reactans EDP28) were investigated for their in vitro growth promoting traits and for their ability to induce growth of maize seedlings exposed to Zn and Cd. PGPR inoculum size (10 and 20 mL) and inoculation effectiveness was assessed in energy maize sowed in a mine soil. The results showed that some bacteria only exhibited or enhanced PGP traits when exposed to metals. The bacterial strains ECP37 and EDP28 were the most efficient in improving seedling growth with increasing metal concentrations, followed by S3X. When inoculated in energy maize grown in mine soil, these same strains also outperformed the others by increasing shoot biomass and elongation, metal accumulation, and by decreasing it in roots. The most evident effect of doubling the inoculum size was the increase in Cd accumulation, which was of 17% and 31% in roots and shoots, respectively. Other effects included a slight reduction in shoots' biomass (13%) and a general decrease in P tissue content. The results obtained suggest that PGPR selection prior to inoculation in the target soils should be primarily based in seedling growth promotion under metal exposure. Additionally, the size of the inoculum applied in the soil rhizosphere appears to be important in remediation processes and should be taken into account when planning phytomanagement strategies, especially when the biomass of plants is an important demand.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMOREIRA, Helena; PEREIRA, Sofia I. A.; MARQUES, Ana P. G. C.; RANGEL, António O. S. S.; CASTRO, Paula M. L. - Selection of metal resistant plant growth promoting rhizobacteria for the growth and metal accumulation of energy maize in a mine soil - effect of the inoculum size. Geoderma. ISSN 0016-7061. Vol. 278 (2016), p. 1-11pt_PT
dc.identifier.doi10.1016/j.geoderma.2016.05.003pt_PT
dc.identifier.eid84969939861
dc.identifier.issn0016-7061
dc.identifier.urihttp://hdl.handle.net/10400.14/23091
dc.identifier.wos000378669900001
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevier
dc.relationFormulation of new biofertilizers for crop production: contributions to sustainable agricultural practices
dc.relationAssessment of the energy production potential from phytoremediation derived biomass
dc.subjectSoil remediationpt_PT
dc.subjectPollutionpt_PT
dc.subjectHeavy metalspt_PT
dc.subjectPGPRpt_PT
dc.titleSelection of metal resistant plant growth promoting rhizobacteria for the growth and metal accumulation of energy maize in a mine soil — Effect of the inoculum sizept_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleFormulation of new biofertilizers for crop production: contributions to sustainable agricultural practices
oaire.awardTitleAssessment of the energy production potential from phytoremediation derived biomass
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F105152%2F2014/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F65134%2F2009/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F108359%2F2015/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FMulti%2F50016%2F2013/PT
oaire.citation.endPage11
oaire.citation.startPage1
oaire.citation.titleGeodermapt_PT
oaire.citation.volume278
oaire.fundingStreamSFRH
oaire.fundingStream5876
person.familyNamePereira
person.familyNameMarques
person.familyNameSantos Silva Rangel
person.familyNameCastro
person.givenNameSofia
person.givenNameAna
person.givenNameAntónio Osmaro
person.givenNamePaula
person.identifier2013444
person.identifier.ciencia-id3416-CFB7-17A6
person.identifier.ciencia-idD61D-7CFB-178A
person.identifier.ciencia-id7C1F-6C72-354A
person.identifier.orcid0000-0002-5897-687X
person.identifier.orcid0000-0001-8232-1155
person.identifier.orcid0000-0002-6486-8947
person.identifier.orcid0000-0001-8841-6606
person.identifier.ridH-4202-2016
person.identifier.ridM-8241-2013
person.identifier.scopus-author-id15127794800
person.identifier.scopus-author-id14523081300
person.identifier.scopus-author-id7004827387
person.identifier.scopus-author-id7102781782
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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