Ensifer fredii symbiovar vachelliae nodulates endemic Vachellia gummifera in semiarid Moroccan areas.
Syst Appl Microbiol
; 42(5): 125999, 2019 Sep.
Article
em En
| MEDLINE
| ID: mdl-31349995
ABSTRACT
The purpose of this work was to study the genetic diversity of the nodule-forming bacteria associated with native populations of Vachellia gummifera growing wild in Morocco. The nearly complete 16S rRNA gene sequences from three selected strains, following ARDRA and REP-PCR results, revealed they were members of the genus Ensifer and the sequencing of the housekeeping genes recA, gyrB, dnaK and rpoB, and their concatenated phylogenetic analysis, showed that the 3 strains belong to the species E. fredii. Based on the nodC and nodA phylogenies, the 3 strains clearly diverged from the type and other reference strains of E. fredii and formed a clearly separated cluster. The strains AGA1, AGA2 and AGB23 did not form nodules on Glycine max, Phaseolus vulgaris and Medicago truncatula, and effectively nodulated V. gummifera, Acacia cyanophylla, Prosopis chilensis and Leucaena leucocephala. Based on similarities of the nodC and nodA symbiotic genes and differences in the host range, the strains isolated from Moroccan endemic V. gummifera may form a different symbiovar within Ensifer species, for which the name "vachelliae" is proposed.
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MEDLINE
Assunto principal:
Simbiose
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Variação Genética
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Sinorhizobium
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Nódulos Radiculares de Plantas
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Fabaceae
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article