Source and acquisition of rhizosphere microbes in Antarctic vascular plants

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dc.contributor.authorGuajardo Leiva, Sergio
dc.contributor.authorAlarcón, Jaime
dc.contributor.authorGutzwiller, Florence
dc.contributor.authorGallardo Cerda, Jorge
dc.contributor.authorAcuña Rodríguez, Ian S.
dc.contributor.authorMolina Montenegro, Marco
dc.contributor.authorCrandall, Keith A.
dc.contributor.authorPérez Losada, Marcos
dc.contributor.authorCastro Nallar, Eduardo
dc.date.accessioned2022-10-07T16:58:44Z
dc.date.available2022-10-07T16:58:44Z
dc.date.issued2022-09
dc.descriptionIndexación: Scopuses
dc.description.abstractAbstract Rhizosphere microbial communities exert critical roles in plant health, nutrient cycling, and soil fertility. Despite the essential functions conferred by microbes, the source and acquisition of the rhizosphere are not entirely clear. Therefore, we investigated microbial community diversity and potential source using the only two native Antarctic plants, Deschampsia antarctica (Da) and Colobanthus quitensis (Cq), as models. We interrogated rhizosphere and bulk soil microbiomes at six locations in the Byers Peninsula, Livingston Island, Antarctica, both individual plant species and their association (Da.Cq). Our results show that host plant species influenced the richness and diversity of bacterial communities in the rhizosphere. Here, the Da rhizosphere showed the lowest richness and diversity of bacteria compared to Cq and Da.Cq rhizospheres. In contrast, for rhizosphere fungal communities, plant species only influenced diversity, whereas the rhizosphere of Da exhibited higher fungal diversity than the Cq rhizosphere. Also, we found that environmental geographic pressures (i.e., sampling site, latitude, and altitude) and, to a lesser extent, biotic factors (i.e., plant species) determined the species turnover between microbial communities. Moreover, our analysis shows that the sources of the bacterial communities in the rhizosphere were local soils that contributed to homogenizing the community composition of the different plant species growing in the same sampling site. In contrast, the sources of rhizosphere fungi were local (for Da and Da.Cq) and distant soils (for Cq). Here, the host plant species have a specific effect in acquiring fungal communities to the rhizosphere. However, the contribution of unknown sources to the fungal rhizosphere (especially in Da and Da.Cq) indicates the existence of relevant stochastic processes in acquiring these microbes. Our study shows that rhizosphere microbial communities differ in their composition and diversity. These differences are explained mainly by the microbial composition of the soils that harbor them, acting together with plant species-specific effects. Both plant species acquire bacteria from local soils to form part of their rhizosphere. Seemingly, the acquisition process is more complex for fungi. We identified a significant contribution from unknown fungal sources due to stochastic processes and known sources from soils across the Byers Peninsula. Copyright © 2022 Guajardo-Leiva, Alarcón, Gutzwiller, Gallardo-Cerda, Acuña-Rodríguez, Molina-Montenegro, Crandall, Pérez-Losada and Castro-Nallar.es
dc.description.urihttps://www.frontiersin.org/articles/10.3389/fmicb.2022.916210/full
dc.identifier.citationFrontiers in Microbiology Volume 138 September 2022 Article number 916210es
dc.identifier.doi10.3389/fmicb.2022.916210
dc.identifier.doi10.3389/fmicb.2022.916210
dc.identifier.issn1664-302X
dc.identifier.urihttps://repositorio.unab.cl/xmlui/handle/ria/24206
dc.language.isoenes
dc.publisherFrontiers Media S.A.es
dc.rights.licenseAtribución 4.0 Internacional (CC BY 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/deed.es
dc.subjectAmplicon sequencinges
dc.subjectHost microbe interactionses
dc.subjectMicrobial ecology and diversityes
dc.subjectPlant microbiomees
dc.subjectRhizosphere effectses
dc.subjectSouth Shetland Islandses
dc.titleSource and acquisition of rhizosphere microbes in Antarctic vascular plantses
dc.typeArtículoes
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