Genotypic Characterization of Azotobacteria Isolated from Argentinean Soils and Plant-Growth-Promoting Traits of Selected Strains with Prospects for Biofertilizer Production
Figure 4
Effect of IAA pure solutions and cell-free cultures of A. salinestris treatments on root morphology of 4-day-old wheat seedlings. Root tips of wheat seedlings treated with solutions of 2 μg mL−1 and 20 μg mL−1 of IAA (low-IAA and high-IAA, resp.) and cell-free cultures of low- (AT18) and high- (AT19) auxin-producing Azotobacter strains.
