Isolation and Characterization of Plant Growth-Promoting Rhizobacteria from Coffee Plantation Soils and Its Influence on Maize Growth

Plant growth-promoting rhizobacteria (PGPR) are an important bacterial resource as biofertilizers, which can promote plant growth and increase crop yields. In this study, isolation, characterization, its effect on promotion were assessed by isolating PGPR using soil samples collected from Jimma, Ethiopia. Out of 10 isolates, three them (JEC3, JEC4, JEC7) exhibited PSB traits in Pikovskaya media solubilizing phosphate producing IAA. Of the JEC4 recorded maximum solubilization index (4.98), soluble (283 μg/ml), IAA production (10.21 μg/ml). The findings isolates' morphological biochemical tests showed that JEC3, JEC7 Bacillus sp., Pseudomonas Enterobacter respectively. optimization was done different incubation times sources carbon nitrogen. Furthermore, isolate (JEC4) tested for (PGP) activities indicated ammonia, hydrogen cyanide, siderophore. a significant sideways (%) seed germination, root shoot length, fresh dry weight root, maize field experiments than untreated ones. results indicate be developed biological fertilizer promoting productivity ecosystem dynamics.