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Assessment of plant growth promoting bacterial populations in the rhizosphere of metallophytes from the Kettara mine, Marrakech

2016Journal article Restricted access
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dc.contributor.authorBenidire, L.
dc.contributor.authorPereira, S. I. A.
dc.contributor.authorCastro, P. M. L.
dc.contributor.authorBoularbah, A.
dc.date.accessioned2017-10-16T16:30:42Z
dc.date.available2017-10-16T16:30:42Z
dc.date.issued2016
dc.description.abstractSoil heavy metal contamination resulting from mining activities constitutes a major environmental problem worldwide. The spread of heavy metals is often facilitated by scarce vegetation cover, so there is an urgent need to improve plant survival and establishment in these metalliferous areas. This study is aimed at the isolation and analysis of the phylogenetic relationship of culturable bacteria from the rhizosphere of metallophyte plants growing in the Kettara mine, in Marrakech, in order to select plant growth-promoting rhizobacteria (PGPR), which could be used in assisted-phytoremediation. Bacterial isolates were grouped by random amplified polymorphic DNA analysis and identified by 16S rRNA gene sequencing. Strains were further characterized for the production of plant growth-promoting (PGP) substances, such as NH3, siderophores, indol-3-acetic acid (IAA), hydrogen cyanide, and extracellular enzymes, for ACC-deaminase activity, their capacity to solubilize phosphate, and for their tolerance to heavy metals and acidic pH. Rhizosphere soils were highly contaminated with Cu and Zn and presented low fertility. Phylogenetic analysis showed that the rhizobacteria were affiliated to three major groups: γ-Proteobacteria (48 %), β-Proteobacteria (17 %), and Bacilli (17 %). The most represented genera were Pseudomonas (38 %), Bacillus (10 %), Streptomyces (10 %), and Tetrathiobacter (10 %). Overall, rhizobacterial strains showed an ability to produce multiple, important PGP traits, which may be helpful when applied as plant growth promoter agents in contaminated soils. PGPR were also able to withstand high levels of metals (up to 2615.2 mg Zn l(-1), 953.29 mg Cu l(-1), and 1124.6 mg Cd l(-1)) and the order of metal toxicity was Cd > Cu > Zn. The rhizobacterial strains isolated in the present study have the potential to be used as efficient bioinoculants in phytoremediation strategies for the recovery of Kettara mine soils.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationBENIDIRE, L.; PEREIRA, S. I. A.; CASTRO, Paula M. L.; BOULARBAH, A. - Assessment of plant growth promoting bacterial populations in the rhizosphere of metallophytes from the Kettara mine, Marrakech. Environmental Science And Pollution Research. ISSN 1614-7499. Vol. 23, nº 21 (2016), p. 21751-21765pt_PT
dc.identifier.doi10.1007/s11356-016-7378-6pt_PT
dc.identifier.eid84982128191
dc.identifier.pmid27522210
dc.identifier.urihttp://hdl.handle.net/10400.14/23121
dc.identifier.wos000387599600058
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringer
dc.subjectKettara minept_PT
dc.subjectRhizosphere soilspt_PT
dc.subjectHeavy metalspt_PT
dc.subjectBacterial diversitypt_PT
dc.subjectPlant growth-promoting rhizobacteriapt_PT
dc.subjectMetal resistancept_PT
dc.titleAssessment of plant growth promoting bacterial populations in the rhizosphere of metallophytes from the Kettara mine, Marrakechpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FMulti%2F50016%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F65134%2F2009/PT
oaire.citation.endPage21765
oaire.citation.issue21
oaire.citation.startPage21751
oaire.citation.titleEnvironmental Science and Pollution Researchpt_PT
oaire.citation.volume23
oaire.fundingStream5876
oaire.fundingStreamSFRH
person.familyNamePereira
person.familyNameCastro
person.givenNameSofia
person.givenNamePaula
person.identifier2013444
person.identifier.ciencia-id3416-CFB7-17A6
person.identifier.ciencia-id7C1F-6C72-354A
person.identifier.orcid0000-0002-5897-687X
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-id7102781782
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
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication948778fb-c623-4efd-9520-1b147c508660
relation.isAuthorOfPublicationf2253992-dc8d-4042-9a0f-597ebcf0a1d6
relation.isAuthorOfPublication.latestForDiscoveryf2253992-dc8d-4042-9a0f-597ebcf0a1d6
relation.isProjectOfPublication3fe5970e-de39-42f7-a29d-18521b591a09
relation.isProjectOfPublicationc2ea48f8-32b1-490a-8f7d-9c045d460a8c
relation.isProjectOfPublication.latestForDiscovery3fe5970e-de39-42f7-a29d-18521b591a09

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