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Probiotic activities of Rhizobium laguerreae on growth and quality of spinach

AuthorsJiménez Gómez, Alejandro; Flores Félix, José David; García Fraile, Paula; Mateos, Pedro F. ; Menéndez, Esther; Velázquez, Encarna ; Rivas, Raúl 0
Plant growth-promoting rhizobacteria
Plant growth
Issue Date2018
PublisherSpringer Nature
CitationScientific Reports 8: 295 (2018)
AbstractThe growing interest in a healthy lifestyle and in environmental protection is changing habits regarding food consumption and agricultural practices. Good agricultural practice is indispensable, particularly for raw vegetables, and can include the use of plant probiotic bacteria for the purpose of biofertilization. In this work we analysed the probiotic potential of the rhizobial strain PEPV40, identified as Rhizobium laguerreae through the analysis of the recA and atpD genes, on the growth of spinach plants. This strain presents several in vitro plant growth promotion mechanisms, such as phosphate solubilisation and the production of indole acetic acid and siderophores. The strain PEPV40 produces cellulose and forms biofilms on abiotic surfaces. GFP labelling of this strain showed that PEPV40 colonizes the roots of spinach plants, forming microcolonies typical of biofilm initiation. Inoculation with this strain significantly increases several vegetative parameters such as leaf number, size and weight, as well as chlorophyll and nitrogen contents. Therefore, our findings indicate, for the first time, that Rhizobium laguerreae is an excellent plant probiotic, which increases the yield and quality of spinach, a vegetable that is increasingly being consumed raw worldwide.
Description10 páginas, 4 figuras, 2 tablas.-- The first publication is available at https://www.nature.com
Publisher version (URL)http://dx.doi.org/10.1038/s41598-017-18632-z
Appears in Collections:(IRNASA) Artículos
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