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Rajnovic I, Ramírez-Bahena MH, Sánchez-Juanes F, González-Buitrago JM, Kajic S, Peix Á, Velázquez E, Sikora S. Phylogenetic diversity of rhizobia nodulating Phaseolus vulgaris in Croatia and definition of the symbiovar phaseoli within the species Rhizobium pisi. Syst Appl Microbiol 2019; 42:126019. [PMID: 31635886 DOI: 10.1016/j.syapm.2019.126019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 07/23/2019] [Accepted: 07/25/2019] [Indexed: 11/27/2022]
Abstract
Phaseolus vulgaris is a legume indigenous to America which is currently cultivated in Europe including countries located at the Southeast of this continent, such as Croatia, where several local landraces are cultivated, most of them of Andean origin. In this work we identify at species and symbiovar levels several fast-growing strains able to form effective symbiosis with P. vulgaris in different Croatian soils. The identification at species level based on MALDI-TOF MS and core gene sequence analysis showed that most of these strains belong to the species R. leguminosarum, R. hidalgonense and R. pisi. In addition, several strains belong to putative new species phylogenetically close to R. ecuadorense and R. sophoriradicis. All Croatian strains belong to the symbiovar phaseoli and harbour the α and γ nodC alleles typical for American strains of this symbiovar. Nevertheless, most of Croatian strains harboured the γ nodC gene allele supporting its Andean origin since it is also dominant in other European countries, where Andean cultivars of P. vulgaris are traditionally cultivated, as occurs in Spain. The only strains harbouring the α nodC allele belong to R. hidalgonense and R. pisi, this last only containing the symbiovars viciae and trifolii to date. This is the first report about the presence in Europe of the species R. hidalgonense, the nodulation of P. vulgaris by R. pisi and the existence of the symbiovar phaseoli within this species. These results significantly increase the knowledge of the biogeography of Rhizobium-P. vulgaris symbiosis.
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Affiliation(s)
- Ivana Rajnovic
- Department of Microbiology, Faculty of Agriculture, University of Zagreb, Zagreb, Croatia
| | | | - Fernando Sánchez-Juanes
- Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, Spain; Departamento de Bioquímica y Biología Molecular, Universidad de Salamanca, Spain
| | - José-Manuel González-Buitrago
- Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, Spain; Departamento de Bioquímica y Biología Molecular, Universidad de Salamanca, Spain
| | - Sanja Kajic
- Department of Microbiology, Faculty of Agriculture, University of Zagreb, Zagreb, Croatia
| | - Álvaro Peix
- Instituto de Recursos Naturales y Agrobiología, IRNASA-CSIC, Salamanca, Spain; Unidad Asociada Grupo de Interacción Planta-Microorganismo (Universidad de Salamanca-IRNASA-CSIC), Salamanca, Spain.
| | - Encarna Velázquez
- Unidad Asociada Grupo de Interacción Planta-Microorganismo (Universidad de Salamanca-IRNASA-CSIC), Salamanca, Spain; Departmento de Microbiología y Genética and CIALE, Universidad de Salamanca, Salamanca, Spain
| | - Sanja Sikora
- Department of Microbiology, Faculty of Agriculture, University of Zagreb, Zagreb, Croatia
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Robledo M, Menéndez E, Jiménez-Zurdo JI, Rivas R, Velázquez E, Martínez-Molina E, Oldroyd G, Mateos PF. Heterologous Expression of Rhizobial CelC2 Cellulase Impairs Symbiotic Signaling and Nodulation in Medicago truncatula. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2018; 31:568-575. [PMID: 29334470 DOI: 10.1094/mpmi-11-17-0265-r] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The infection of legume plants by rhizobia is tightly regulated to ensure accurate bacterial penetration, infection, and development of functionally efficient nitrogen-fixing root nodules. Rhizobial Nod factors (NF) have key roles in the elicitation of nodulation signaling. Infection of white clover roots also involves the tightly regulated specific breakdown of the noncrystalline apex of cell walls in growing root hairs, which is mediated by Rhizobium leguminosarum bv. trifolii cellulase CelC2. Here, we have analyzed the impact of this endoglucanase on symbiotic signaling in the model legume Medicago truncatula. Ensifer meliloti constitutively expressing celC gene exhibited delayed nodulation and elicited aberrant ineffective nodules, hampering plant growth in the absence of nitrogen. Cotreatment of roots with NF and CelC2 altered Ca2+ spiking in root hairs and induction of the early nodulin gene ENOD11. Our data suggest that CelC2 alters early signaling between partners in the rhizobia-legume interaction.
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Affiliation(s)
- Marta Robledo
- 1 Departamento de Microbiología y Genética, Centro Hispano-Luso de Investigaciones Agrarias, Universidad de Salamanca, Unidad Asociada CSIC/USAL, Spain
- 2 Estación Experimental del Zaidín, CSIC, Granada, Spain; and
| | - Esther Menéndez
- 1 Departamento de Microbiología y Genética, Centro Hispano-Luso de Investigaciones Agrarias, Universidad de Salamanca, Unidad Asociada CSIC/USAL, Spain
| | | | - Raúl Rivas
- 1 Departamento de Microbiología y Genética, Centro Hispano-Luso de Investigaciones Agrarias, Universidad de Salamanca, Unidad Asociada CSIC/USAL, Spain
| | - Encarna Velázquez
- 1 Departamento de Microbiología y Genética, Centro Hispano-Luso de Investigaciones Agrarias, Universidad de Salamanca, Unidad Asociada CSIC/USAL, Spain
| | - Eustoquio Martínez-Molina
- 1 Departamento de Microbiología y Genética, Centro Hispano-Luso de Investigaciones Agrarias, Universidad de Salamanca, Unidad Asociada CSIC/USAL, Spain
| | - Giles Oldroyd
- 3 Department of Cell and Development Biology, John Innes Centre, Norwich, U.K
| | - Pedro F Mateos
- 1 Departamento de Microbiología y Genética, Centro Hispano-Luso de Investigaciones Agrarias, Universidad de Salamanca, Unidad Asociada CSIC/USAL, Spain
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Analysis of rhizobial endosymbionts of Vicia, Lathyrus and Trifolium species used to maintain mountain firewalls in Sierra Nevada National Park (South Spain). Syst Appl Microbiol 2017; 40:92-101. [DOI: 10.1016/j.syapm.2016.11.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Revised: 11/16/2016] [Accepted: 11/17/2016] [Indexed: 10/20/2022]
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Velázquez E, Flores-Félix JD, Sánchez-Juanes F, González-Buitrago JM, Peix A. The status of the genus Seliberia
Aristovskaya and Parinkina 1963
(Approved Lists 1980) and the species Seliberia stellata
Aristovskaya and Parinkina 1963
(Approved Lists 1980). Request for an Opinion. Int J Syst Evol Microbiol 2015; 65:2337-2340. [DOI: 10.1099/ijs.0.000262] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Encarna Velázquez
- Unidad Asociada Grupo de Interacción planta-microorganismo (Universidad de Salamanca-IRNASA-CSIC), Salamanca, Spain
- Departamento de Microbiología y Genética, Universidad de Salamanca, Salamanca, Spain
| | | | - Fernando Sánchez-Juanes
- Departamento de Bioquímica y Biología Molecular, Universidad de Salamanca, Salamanca, Spain
- Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, Spain
| | - José Manuel González-Buitrago
- Departamento de Bioquímica y Biología Molecular, Universidad de Salamanca, Salamanca, Spain
- Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, Spain
| | - Alvaro Peix
- Unidad Asociada Grupo de Interacción planta-microorganismo (Universidad de Salamanca-IRNASA-CSIC), Salamanca, Spain
- Instituto de Recursos Naturales y Agrobiología de Salamanca, Consejo Superior de Investigaciones Científicas, (IRNASA-CSIC), Salamanca, Spain
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Rogel MA, Bustos P, Santamaría RI, González V, Romero D, Cevallos MÁ, Lozano L, Castro-Mondragón J, Martínez-Romero J, Ormeño-Orrillo E, Martínez-Romero E. Genomic basis of symbiovar mimosae in Rhizobium etli. BMC Genomics 2014; 15:575. [PMID: 25005495 PMCID: PMC4125696 DOI: 10.1186/1471-2164-15-575] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Accepted: 07/01/2014] [Indexed: 11/25/2022] Open
Abstract
Background Symbiosis genes (nod and nif) involved in nodulation and nitrogen fixation in legumes are plasmid-borne in Rhizobium. Rhizobial symbiotic variants (symbiovars) with distinct host specificity would depend on the type of symbiosis plasmid. In Rhizobium etli or in Rhizobium phaseoli, symbiovar phaseoli strains have the capacity to form nodules in Phaseolus vulgaris while symbiovar mimosae confers a broad host range including different mimosa trees. Results We report on the genome of R. etli symbiovar mimosae strain Mim1 and its comparison to that from R. etli symbiovar phaseoli strain CFN42. Differences were found in plasmids especially in the symbiosis plasmid, not only in nod gene sequences but in nod gene content. Differences in Nod factors deduced from the presence of nod genes, in secretion systems or ACC-deaminase could help explain the distinct host specificity. Genes involved in P. vulgaris exudate uptake were not found in symbiovar mimosae but hup genes (involved in hydrogen uptake) were found. Plasmid pRetCFN42a was partially contained in Mim1 and a plasmid (pRetMim1c) was found only in Mim1. Chromids were well conserved. Conclusions The genomic differences between the two symbiovars, mimosae and phaseoli may explain different host specificity. With the genomic analysis presented, the term symbiovar is validated. Furthermore, our data support that the generalist symbiovar mimosae may be older than the specialist symbiovar phaseoli. Electronic supplementary material The online version of this article (doi:10.1186/1471-2164-15-575) contains supplementary material, which is available to authorized users.
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Gurkanli CT, Ozkoc I, Gunduz I. Genetic diversity of rhizobia nodulating common bean (Phaseolus vulgaris L.) in the Central Black Sea Region of Turkey. ANN MICROBIOL 2012. [DOI: 10.1007/s13213-012-0551-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Robledo M, Rivera L, Jiménez-Zurdo JI, Rivas R, Dazzo F, Velázquez E, Martínez-Molina E, Hirsch AM, Mateos PF. Role of Rhizobium endoglucanase CelC2 in cellulose biosynthesis and biofilm formation on plant roots and abiotic surfaces. Microb Cell Fact 2012; 11:125. [PMID: 22970813 PMCID: PMC3520766 DOI: 10.1186/1475-2859-11-125] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2012] [Accepted: 09/06/2012] [Indexed: 02/02/2023] Open
Abstract
Background The synthesis of cellulose is among the most important but poorly understood biochemical processes, especially in bacteria, due to its complexity and high degree of regulation. In this study, we analyzed both the production of cellulose by all known members of the Rhizobiaceae and the diversity of Rhizobium celABC operon predicted to be involved in cellulose biosynthesis. We also investigated the involvement in cellulose production and biofilm formation of celC gene encoding an endoglucanase (CelC2) that is required for canonical symbiotic root hair infection by Rhizobium leguminosarum bv. trifolii. Results ANU843 celC mutants lacking (ANU843ΔC2) or overproducing cellulase (ANU843C2+) produced greatly increased or reduced amounts of external cellulose micro fibrils, respectively. Calcofluor-stained cellulose micro fibrils were considerably longer when formed by ANU843ΔC2 bacteria rather than by the wild-type strain, in correlation with a significant increase in their flocculation in batch culture. In contrast, neither calcofluor-stained extracellular micro fibrils nor flocculation was detectable in ANU843C2+ cells. To clarify the role of cellulose synthesis in Rhizobium cell aggregation and attachment, we analyzed the ability of these mutants to produce biofilms on different surfaces. Alteration of wild-type CelC2 levels resulted in a reduced ability of bacteria to form biofilms both in abiotic surfaces and in planta. Conclusions Our results support a key role of the CelC2 cellulase in cellulose biosynthesis by modulating the length of the cellulose fibrils that mediate firm adhesion among Rhizobium bacteria leading to biofilm formation. Rhizobium cellulose is an essential component of the biofilm polysaccharidic matrix architecture and either an excess or a defect of this “building material” seem to collapse the biofilm structure. These results position cellulose hydrolytic enzymes as excellent anti-biofilm candidates.
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Affiliation(s)
- M Robledo
- Departamento de Microbiología y Genética and CIALE, Universidad de Salamanca, Salamanca, Spain
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López-Guerrero MG, Ormeño-Orrillo E, Velázquez E, Rogel MA, Acosta JL, Gónzalez V, Martínez J, Martínez-Romero E. Rhizobium etli taxonomy revised with novel genomic data and analyses. Syst Appl Microbiol 2012; 35:353-8. [DOI: 10.1016/j.syapm.2012.06.009] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2012] [Revised: 05/14/2012] [Accepted: 06/14/2012] [Indexed: 11/16/2022]
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Faghire M, Mandri B, Oufdou K, Bargaz A, Ghoulam C, Ramírez-Bahena M, Velázquez E, Peix A. Identification at the species and symbiovar levels of strains nodulating Phaseolus vulgaris in saline soils of the Marrakech region (Morocco) and analysis of the otsA gene putatively involved in osmotolerance. Syst Appl Microbiol 2012; 35:156-64. [DOI: 10.1016/j.syapm.2012.02.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2011] [Revised: 02/03/2012] [Accepted: 02/04/2012] [Indexed: 11/29/2022]
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