Résumé:
Plant growth promoting and controlling bacteria, known as PGPRs, have increasingly
gained scientific, biotechnological and agricultural importance. In this work. I aim to
isolate, identify and characterize a few isolates of Pseudomonas groups as PGPR. Eleven
rhizospheric isolates resembling Pseudomonas were selected, nine of which demonstrated
production of KBZ1, KCZ2, KAZ3, KDZ4, KCY5, KDY6I, KDY6II, KBY7, KCX9
fluorescence and passed multiple characterization and PGP tests. The results obtained
showed that the maximum value for the AIA test was 8.86a± 0.46μg/l (KDY6II) and the
minimum value was 3.10e±0.61 μg/l (KBX10) for the production of AIA . Regarding the
solubilization of phosphate, the maximum value was 533.39a ± 1.23 (KAZ3) as for the
minimum value, it was 233.33f± 0.85 (KCZ2). For the production of HCN five isolates
showed positive production and six isolates were negative. All isolates fixed nitrogen. For
the solubilization of zinc, the maximum value was 500.33a±1.52 (KAZ3) and a minimum
value was 280f±1 (KCZ2).
