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Título: | The endemic Chamaecytisus albidus is nodulated by symbiovar genistearum of Bradyrhizobium in the Moroccan Maamora Forest |
Autor: | Bouhnik, O.; Lamin, H.; Alami, S.; Bennis, M.; Ouajdi, M.; Bellaka, M.; El Antry, S.; Abbas, Younes; Abdelmoumen, H.; Bedmar, Eulogio J. CSIC ORCID; El Idrissi Mustapha, M. | Palabras clave: | Chamaecytisus albidus Bradyrhizobium inoculation rrs MLSA Symbiotic genes Phenotypic characteristics |
Fecha de publicación: | 2021 | Editor: | Elsevier | Citación: | Systematic and Applied Microbiology 44(3): 126197 (2021) | Resumen: | Out of 54 isolates from root nodules of the Moroccan-endemic Chamaecytisus albidus plants growing in soils from the Maamora cork oak forest, 44 isolates formed nodules when used to infect their original host plant. A phenotypic analysis showed the metabolic diversity of the strains that used different carbohydrates and amino acids as sole carbon and nitrogen sources. The isolates grew on media with pH values ranging from 6 to 8. However, they did not tolerate high temperatures or drought and they did not grow on media with salt concentrations higher than 85 mM. REP-PCR fingerprinting grouped the strains into 12 clusters, of which representative strains were selected for ARDRA and rrs analyses. The rrs gene sequence analysis indicated that all 12 strains were members of the genus Bradyrhizobium and their phylogeny showed that they were grouped into two different clusters. Two strains from each group were selected for multilocus sequence analysis (MLSA) using atpD, recA, gyrB and glnII housekeeping genes. The inferred phylogenetic trees confirmed that the strains clustered into two divergent clusters. Strains CM55 and CM57 were affiliated to the B. canariense/B. lupini group, whereas strains CM61 and CM64 were regrouped within the B. cytisi/B. rifense lineage. The analysis of the nodC symbiotic gene affiliated the strains to the symbiovar genistearum. The strains were also able to nodulate Retama monosperma, Lupinus luteus and Cytisus monspessulanus, but not Phaseolus vulgaris or Glycine max. Inoculation tests with C. albidus showed that some strains could be exploited as efficient inocula that could be used to improve plant growth in the Maamora forest. | Versión del editor: | http://dx.doi.org/10.1016/j.syapm.2021.126197 | URI: | http://hdl.handle.net/10261/256452 | DOI: | 10.1016/j.syapm.2021.126197 | Identificadores: | doi: 10.1016/j.syapm.2021.126197 issn: 1618-0984 |
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