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Analysis of the Interaction between Pisum sativum L. and Rhizobium laguerreae Strains Nodulating This Legume in Northwest Spain

AuthorsFlores Félix, José David; Carro, Lorena CSIC ORCID; Cerda-Castillo, Eugenia; Squartini, Andrea; Rivas, Raúl CSIC ORCID; Velázquez, Encarna CSIC ORCID
Pisum sativum
Rhizobium laguerreae
Quorum sensing
Nodulation effectiveness
Nitrogen fixation
Issue Date2020
PublisherMultidisciplinary Digital Publishing Institute
CitationPlants 9(12): 1755 (2020)
AbstractPisum sativum L. (pea) is one of the most cultivated grain legumes in European countries due to the high protein content of its seeds. Nevertheless, the rhizobial microsymbionts of this legume have been scarcely studied in these countries. In this work, we analyzed the rhizobial strains nodulating the pea in a region from Northwestern Spain, where this legume is widely cultivated. The isolated strains were genetically diverse, and the phylogenetic analysis of core and symbiotic genes showed that these strains belong to different clusters related to R. laguerreae sv. viciae. Representative strains of these clusters were able to produce cellulose and cellulases, which are two key molecules in the legume infection process. They formed biofilms and produced acyl-homoserine lactones (AHLs), which are involved in the quorum sensing regulation process. They also exhibited several plant growth promotion mechanisms, including phosphate solubilization, siderophore, and indole acetic acid production and symbiotic atmospheric nitrogen fixation. All strains showed high symbiotic efficiency on pea plants, indicating that strains of R. laguerreae sv. viciae are promising candidates for the biofertilization of this legume worldwide.
Description16 páginas, 2 tablas y 5 figuras.
Publisher version (URL)https://doi.org/10.3390/plants9121755
Appears in Collections:(IRNASA) Artículos
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