The peanut (Arachis hypogaea L.) is an important seed legume in the tropics. In Cameroon, the diversity and the competitivity of rhizobia nodulating this plant are practically unknown while their exploration can allow to further improve its interests in agriculture. The aim of this study was to assess the ability of the rhizobia isolated from two sites soils (Bafoussam and Ebolowa) to synthesize indole-3-acetic acid and to tolerate antibiotics. Rhizobia trapping was realized in plastic pots with peanut as a trap plant. The results were analyzed statistically by ANOVA using R 3.3.1 and GraphPad Prism 5.0. A collection of thirteen isolates was constituted among which seven from Bafoussam and six from Ebolowa. All isolates were fast growing on YEMA-CR medium. In this study, there was a significant production of IAA by the isolates with a maximum of 16.33 µg/mL for AhBf5 followed by AhEb1 (11.58 µg/mL). The isolates in this study were found to be very resistant to amoxicillin, chloramphenicol, tetracyclin and gentamicin but sensitive to rifampicin. The peanut nodulating rhizobia isolates that show the best skills can be recommended for the production of biofertilizers for sustainable agriculture in Cameroon and elsewhere.

Keywords : Arachis Hypogaea, Peanut Nodulating Bacteria, Indole-3-Acetic Acid, Antibiotics, Cameroon