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The hyperaccumulator Sedum plumbizincicola harbors metal-resistant endophytic bacteria that improve its phytoextraction capacity in multi-metal contaminated soil

2015Journal article Open access
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dc.contributor.authorMa, Ying
dc.contributor.authorOliveira, Rui S.
dc.contributor.authorNai, Fengjiao
dc.contributor.authorRajkumar, Mani
dc.contributor.authorLuo, Yongming
dc.contributor.authorRocha, Inês
dc.contributor.authorFreitas, Helena
dc.date.accessioned2016-04-21T16:46:05Z
dc.date.available2016-04-21T16:46:05Z
dc.date.issued2015
dc.description.abstractEndophyte-assisted phytoremediation has recently been suggested as a successful approach for ecological restoration of metal contaminated soils, however little information is available on the influence of endophytic bacteria on the phytoextraction capacity of metal hyperaccumulating plants in multimetal polluted soils. The aims of our study were to isolate and characterize metal-resistant and 1-aminocyclopropane-1-carboxylate (ACC) utilizing endophytic bacteria from tissues of the newly discovered Zn/Cd hyperaccumulator Sedum plumbizinci cola and to examine if these endophytic bacterial strains could improve the efficiency of phytoextraction of multi-metal contaminated soils. Among a collection of 42 metal resistant bacterial strains isolated from the tissues of S. plumbizinci cola grown on Pb/Zn mine tailings, five plant growth promoting endophytic bacterial strains (PGPE) were selected due to their ability to promote plant growth and to utilize ACC as the sole nitrogen source. The five isolates were identified as Bacillus pumilus E2S2, Bacillus sp. E1S2, Bacillus sp. E4S1, Achromobacter sp. E4L5 and Stenotrophomonas sp. E1L and subsequent testing revealed that they all exhibited traits associated with plant growth promotion, such as production of indole-3-acetic acid and siderophores and solubilization of phosphorus. These five strains showed high resistance to heavy metals (Cd, Zn and Pb) and various antibiotics. Further, inoculation of these ACC utilizing strains significantly increased the concentrations of water ektractable Cd and Zn in soil. Moreover, a pot experiment was conducted to elucidate the effects of inoculating metal-resistant ACC utilizing strains on the growth of S. plumbizincicola and its uptake of Cd, Zn and Pb in multi-metal contaminated soils. Out of the five strains, B. pumilus E2S2 significantly increased root (146%) and shoot (17%) length, fresh (37%) and dry biomass (32%) of S. plumbizincicola as well as plant Cd uptake (43%), whereas Bacillus sp. E1S2 significantly enhanced the accumulation of Zn (18%) in plants compared with non-inoculated controls. The inoculated strains also showed high levels of colonization in rhizosphere and plant tissues. Results demonstrate the potential to improve phytoextraction of soils contaminated with multiple heavy metals by inoculating metal hyperaccumulating plants with their own selected functional endophytic bacterial strains.pt_PT
dc.description.versioninfo:eu-repo/semantics/acceptedVersion
dc.identifier.citationSOUSA, N. R.; FRANCO, A.R.; RAMOS, Miguel A.; OLIVEIRA, Rui; CASTRO, Paula M.L.- The response of Betula pubescens to inoculation with an ectomycorrhizal fungus and a plant growth promoting bacterium is substrate-dependent. Ecological Engineering. ISSN 0925-8574. Vol 81 (2015), p. 439–443pt_PT
dc.identifier.doi10.1016/j.jenvman.2015.03.024
dc.identifier.eid84924933263
dc.identifier.issn0301-4797
dc.identifier.pmid25796039
dc.identifier.urihttp://hdl.handle.net/10400.14/19942
dc.identifier.wos000355036700008
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevier
dc.relationFCOMP-01-0124-FEDER-041572pt_PT
dc.relationSYMBIOTIC EFFICIENCY OF PLANT GROWTH PROMOTING BACTERIA PGPB AND ARBUSCULAR MYCORRHIZAL FUNGI AMF FOR PHYTOREMEDIATION OF METAL CONTAMINATED SOILS
dc.relationSeed coating with microbial inoculants as an ecotechnological approach for sustainable agriculture
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectEndophytic bacteriapt_PT
dc.subjectHeavy metalspt_PT
dc.subjectHyperaccumulatorpt_PT
dc.subjectPhytoextractionpt_PT
dc.subjectSedum plumbizincicolapt_PT
dc.titleThe hyperaccumulator Sedum plumbizincicola harbors metal-resistant endophytic bacteria that improve its phytoextraction capacity in multi-metal contaminated soilpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleSYMBIOTIC EFFICIENCY OF PLANT GROWTH PROMOTING BACTERIA PGPB AND ARBUSCULAR MYCORRHIZAL FUNGI AMF FOR PHYTOREMEDIATION OF METAL CONTAMINATED SOILS
oaire.awardTitleSeed coating with microbial inoculants as an ecotechnological approach for sustainable agriculture
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F76028%2F2011/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F85008%2F2012/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876-PPCDTI/EXPL%2FAGR-TEC%2F1204%2F2013/PT
oaire.citation.endPage69
oaire.citation.startPage62
oaire.citation.volume156
oaire.fundingStreamSFRH
oaire.fundingStream5876-PPCDTI
person.familyNameMa
person.familyNameOliveira
person.familyNameRajkumar
person.familyNamede Sousa Rocha
person.familyNameFreitas
person.givenNameYing
person.givenNameRui S.
person.givenNameMani
person.givenNameInês
person.givenNameHelena
person.identifier174354
person.identifier.ciencia-idCD12-3E6C-D657
person.identifier.ciencia-id251B-951A-F21E
person.identifier.ciencia-idA51D-6574-DFCD
person.identifier.ciencia-id5D1A-0418-B673
person.identifier.orcid0000-0002-0262-4488
person.identifier.orcid0000-0001-5252-5595
person.identifier.orcid0000-0002-2088-4566
person.identifier.orcid0000-0003-3380-602X
person.identifier.orcid0000-0002-1907-9615
person.identifier.ridJ-1152-2014
person.identifier.ridA-2803-2010
person.identifier.scopus-author-id56861504000
person.identifier.scopus-author-id56865275400
person.identifier.scopus-author-id8633775000
person.identifier.scopus-author-id6603978881
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
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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