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Plant growth-promoting rhizobacteria (PGPR) improve the growth and nutrient use efficiency in maize (Zea mays L.) under water deficit conditions

2020Journal article Open access
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dc.contributor.authorPereira, S. I. A.
dc.contributor.authorAbreu, D.
dc.contributor.authorMoreira, H.
dc.contributor.authorVega, A.
dc.contributor.authorCastro, P. M. L.
dc.date.accessioned2021-01-08T11:40:31Z
dc.date.available2021-01-08T11:40:31Z
dc.date.issued2020
dc.description.abstractDrought is one of the major abiotic stresses that affects crop yield worldwide. An eco-friendly tool that can broadly improve plants' tolerance to water stress is bioionocula comprising plant growth-promoting rhizobacteria (PGPR). In this study, the effect of two PGPR Cupriavidus necator 1C2 (B1) and Pseudomonas fluorescens S3X (B2), singly and/or co-inoculated at two inocula sizes (S1 - 3 × 103 cells g−1 dry weight (dw) soil and S2 - 3 × 106 cells g−1 dw soil), on growth, nutrient uptake, and use efficiency was assessed in maize (Zea mays L.) plants grown at three levels of irrigation (80% of water holding capacity (WHC) – well-watered, 60% of WHC - moderate water deficit stress, and 40% of WHC - severe water deficit stress) in a greenhouse experiment. The impact of water deficit and bioinoculants on soil microbial activity (fluorescein diacetate hydrolysis) was also evaluated. Moderate and severe water deficit negatively affected soil microbial activity, as well as, maize growth, by reducing plants' shoot biomass and increasing root/shoot ratio at 60 and 40% of WHC. Bioinoculants mitigated the negative effects on shoot biomass, especially when PGPR were co-inoculated, increasing up to 89% the aerial biomass of plants exposed to moderate water deficit. Bioinoculation also increased nitrogen (N) and phosphorous (P) use efficiency, which may have led to higher maize growth under water deficit conditions. The size of the inocula applied had marginal influence on biometric and nutrient parameters, although the higher concentration of the mixture of PGPR was the most effective in improving shoot biomass under moderate water deficit. This study shows that rhizobacterial strains are able to increase nutrient use efficiency and to alleviate water stress effects in crops with high water demands and have potential applications to keep up with productivity in water stress scenarios.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationPereira, S.I.A., Abreu, D., Moreira, H., Vega, A., Castro, P.M.L. (2020). Plant growth-promoting rhizobacteria (PGPR) improve the growth and nutrient use efficiency in maize (Zea mays L.) under water deficit conditions. Heliyon, 6(10):e05106pt_PT
dc.identifier.doi10.1016/j.heliyon.2020.e05106pt_PT
dc.identifier.eid85092074979
dc.identifier.issn2405-8440
dc.identifier.pmcPMC7550905
dc.identifier.pmid33083600
dc.identifier.urihttp://hdl.handle.net/10400.14/31605
dc.identifier.wos000584392300055
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationNORTE-01-0145-FEDER-000030pt_PT
dc.relationCentre of Biotechnology and Fine Chemistry
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectAgricultural sciencespt_PT
dc.subjectBiotechnologypt_PT
dc.subjectMicrobiologypt_PT
dc.subjectBioinoculantspt_PT
dc.subjectDroughtpt_PT
dc.subjectInocula sizept_PT
dc.subjectWater deficitpt_PT
dc.subjectWater scarcitypt_PT
dc.subjectAgricultural soil sciencept_PT
dc.subjectAgricultural water managementpt_PT
dc.subjectCrop biomasspt_PT
dc.subjectMicrobial biotechnologypt_PT
dc.subjectNutrient availabilitypt_PT
dc.titlePlant growth-promoting rhizobacteria (PGPR) improve the growth and nutrient use efficiency in maize (Zea mays L.) under water deficit conditionspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCentre of Biotechnology and Fine Chemistry
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50016%2F2020/PT
oaire.citation.issue10pt_PT
oaire.citation.titleHeliyonpt_PT
oaire.citation.volume6pt_PT
oaire.fundingStream6817 - DCRRNI ID
person.familyNameCastro
person.givenNamePaula
person.identifier2013444
person.identifier.ciencia-id7C1F-6C72-354A
person.identifier.orcid0000-0001-8841-6606
person.identifier.ridM-8241-2013
person.identifier.scopus-author-id7102781782
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationf2253992-dc8d-4042-9a0f-597ebcf0a1d6
relation.isAuthorOfPublication.latestForDiscoveryf2253992-dc8d-4042-9a0f-597ebcf0a1d6
relation.isProjectOfPublication23ce77db-dbe5-4ace-a524-85008a20b8e3
relation.isProjectOfPublication.latestForDiscovery23ce77db-dbe5-4ace-a524-85008a20b8e3

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