Bacterial collection of Acacia symbionts used in this study.

Strains in bold indicate strain which genome was sequenced in draft. STM, culture collection of Laboratoire des Symbioses Tropicales et Méditerranéennes Montpellier, France. ORS, culture collection of the Laboratoire Commun de Microbiologie IRD/ISRA/UCAD Dakar, Senegal.£: Tolerance to salt in mM as estimated in this study: the number indicates the concentration of salt tested at which the strain still grows.&: Sud: Sudano-sahelian zone with 500–900 mm of annual rainfall; Sah: Sahelian zone with 300–500 mm of annual rainfall.#: Soil ElectroConductivity (EC) in μS cm-1.* indicated salted soil according to FAO (>4000 μS cm-1.).$: Site with numbers corresponds to sites in [22].GPS coordinates: Ndiafate 1: 14°03 753’N, 16°11 239’W; Ndiafate2: 14°03 914’N, 16°11 200’W; Velor1: 14°03 467’N, 16°11 243’W; Velor2: 14°03 466’N, 16°11 176’W; Nonane1: 14°18 187’N, 16°21 340’W; Nonane3: 14° 18 144′N, 16°21 163’W; Foundiougne5: 14°11 935’N, 16°26 836’W; Ngane1: 14°35 N, 16°42 W), Goudiry: 14°11N, 12°43W, Bambey: 14 42’N, 16 28’W; Kamb: 15 31′N, 15 25′W; Dahra: 15°21N, 15°29W. See [23–24] for detailed description of sampling sites.Bacterial collection of Acacia symbionts used in this study.