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The Plant Growth-Promoting Potential of Halotolerant Bacteria Is Not Phylogenetically Determined: Evidence from Two Bacillus megaterium Strains Isolated from Saline Soils Used to Grow Wheat

2023-06Journal article Open access
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dc.contributor.authorAit Bessai, Sylia
dc.contributor.authorCruz, Joana
dc.contributor.authorCarril, Pablo
dc.contributor.authorMelo, Juliana
dc.contributor.authorSantana, Margarida
dc.contributor.authorMouazen, Abdul M.
dc.contributor.authorCruz, Cristina
dc.contributor.authorYadav, Ajar Nath
dc.contributor.authorDias, Teresa
dc.contributor.authorNabti, El-hafid
dc.date.accessioned2023-10-13T16:48:24Z
dc.date.available2023-10-13T16:48:24Z
dc.date.issued2023-06
dc.description.abstract1) Background: Increasing salinity, further potentiated by climate change and soil degra- dation, will jeopardize food security even more. Therefore, there is an urgent need for sustainable agricultural practices capable of maintaining high crop yields despite adverse conditions. Here, we tested if wheat, a salt-sensitive crop, could be a good reservoir for halotolerant bacteria with plant growth-promoting (PGP) capabilities. (2) Methods: We used two agricultural soils from Algeria, which differ in salinity but are both used to grow wheat. Soil halotolerant bacterial strains were isolated and screened for 12 PGP traits related to phytohormone production, improved nitrogen and phosphorus availability, nutrient cycling, and plant defence. The four ‘most promising’ halotolerant PGPB strains were tested hydroponically on wheat by measuring their effect on germination, sur- vival, and biomass along a salinity gradient. (3) Results: Two halotolerant bacterial strains with PGP traits were isolated from the non-saline soil and were identified as Bacillus subtilis and Pseudomonas fluorescens, and another two halotolerant bacterial strains with PGP traits were isolated from the saline soil and identified as B. megaterium. When grown under 250 mM of NaCl, only the inoculated wheat seedlings survived. The halotolerant bacterial strain that displayed all 12 PGP traits and promoted seed germination and plant growth the most was one of the B. megaterium strains isolated from the saline soil. Although they both belonged to the B. megaterium clade and displayed a remarkable halotolerance, the two bacterial strains isolated from the saline soil differed in two PGP traits and had different effects on plant performance, which clearly shows that PGP potential is not phylogenetically determined. (4) Conclusions: Our data highlight that salt-sensitive plants and non-saline soils can be reservoirs for halotolerant microbes with the potential to become effective and sustainable strategies to improve plant tolerance to salinity. However, these strains need to be tested under field conditions and with more crops before being considered biofertilizer candidates.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.3390/microorganisms11071687pt_PT
dc.identifier.urihttp://hdl.handle.net/10451/59751
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.relationFCT UIDB/00329/2020pt_PT
dc.relationFCT PD/BD135249/2017pt_PT
dc.relationEuropean Union’s Horizon 2020 Research and Innovation programme SOILdarity, under grant agreement No. 952051pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.titleThe Plant Growth-Promoting Potential of Halotolerant Bacteria Is Not Phylogenetically Determined: Evidence from Two Bacillus megaterium Strains Isolated from Saline Soils Used to Grow Wheatpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue7pt_PT
oaire.citation.startPage1687pt_PT
oaire.citation.titleMicroorganismspt_PT
oaire.citation.volume11pt_PT
person.familyNameSantana
person.familyNameCruz
person.familyNameMachado Dias
person.givenNameMargarida
person.givenNameCristina
person.givenNameMaria Teresa
person.identifierE-8816-2015
person.identifier.ciencia-idE61F-B75C-90F8
person.identifier.ciencia-idE416-7201-8A84
person.identifier.ciencia-idC41C-C12D-4387
person.identifier.orcid0000-0002-5712-3939
person.identifier.orcid0000-0003-3100-463X
person.identifier.orcid0000-0002-5421-4763
person.identifier.ridB-8626-2015
person.identifier.scopus-author-id35936156600
person.identifier.scopus-author-id56830642400
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationc935329c-9877-44cd-ad63-45a5cb8e2df5
relation.isAuthorOfPublicationa22a48ab-1c74-450c-a512-cdd10abd962b
relation.isAuthorOfPublicationf587ac1a-d425-4a29-827c-c9bd78edb486
relation.isAuthorOfPublication.latestForDiscoveryf587ac1a-d425-4a29-827c-c9bd78edb486

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