Boukhatem Z.F., Domergue O., Bekki A., Merabet C., Sekkour S., Bouazza F., Duponnois Robin, Lajudie Philippe de, Galiana A. (2012). Symbiotic characterization and diversity of rhizobia associated with native and introduced acacias in arid and semi-arid regions in Algeria. FEMS Microbiology Ecology, 80 (3), p. 534-547. ISSN 0168-6496.
Titre du document
Symbiotic characterization and diversity of rhizobia associated with native and introduced acacias in arid and semi-arid regions in Algeria
Année de publication
2012
Auteurs
Boukhatem Z.F., Domergue O., Bekki A., Merabet C., Sekkour S., Bouazza F., Duponnois Robin, Lajudie Philippe de, Galiana A.
Source
FEMS Microbiology Ecology, 2012,
80 (3), p. 534-547 ISSN 0168-6496
The diversity of rhizobia associated with introduced and native Acacia species in Algeria was investigated from soil samples collected across seven districts distributed in arid and semi-arid zones. The in vitro tolerances of rhizobial strains to NaCl and high temperature in pure culture varied greatly regardless of their geographical and host plant origins but were not correlated with the corresponding edaphoclimatic characteristics of the sampling sites, as clearly demonstrated by principal component analysis. Based on 16S rRNA gene sequence comparisons, the 48 new strains isolated were ranked into 10 phylogenetic groups representing five bacterial genera, namely, Ensifer, Mesorhizobium, Rhizobium, Bradyrhizobium, and Ochrobactrum. Acacia saligna, an introduced species, appeared as the most promiscuous host because it was efficiently nodulated with the widest diversity of rhizobia taxa including both fast-growing ones, Rhizobium, Ensifer, and Mesorhizobium, and slow-growing Bradyrhizobium. The five other Acacia species studied were associated with fast-growing bacterial taxa exclusively. No difference in efficiency was found between bacterial taxa isolated from a given Acacia species. The tolerances of strains to salinity and temperature remains to be tested in symbiosis with their host plants to select the most adapted Acacia sp.-LNB taxa associations for further revegetation programs.
Plan de classement
Nodosités [084SYMBIO01]
Descripteurs
LEGUMINEUSE ; FIXATION BIOLOGIQUE DE L'AZOTE ; SYMBIOSE ; BACTERIE ; NODULE RACINAIRE ; INTRODUCTION D'ESPECES ; SALINITE ; TEMPERATURE ; SECHERESSE ; TOLERANCE ; DIVERSITE SPECIFIQUE ; ARN ; PHYLOGENIE ; REFORESTATION
Description Géographique
ZONE ARIDE ; ZONE SEMIARIDE ; ALGERIE
Localisation
Fonds IRD [F B010055635]
Identifiant IRD
fdi:010055635
