Mitigation of Salinity Stress on Soybean Seedlings Using Indole Acetic Acid-Producing Acinetobacter pittii YNA40

Soybean is an important oil crop with multiple uses. Soybeans can grow in various soil types and climates; however, salt stress reduces their yield. Plant growth-promoting microorganisms are environmentally benign way to combat boost plant tolerance. In the present study, we have identified bacteria that produce indole acetic acid (IAA) induce distinct growth characteristics soybean plants under stress. The YNA40 isolate was as Acinetobacter pittii through 16S rRNA sequencing phylogenetic analysis. A pure culture of subjected chromatographic mass spectrometry selected-ion monitoring (GC-MS/SIM) for IAA quantification. results revealed bacterial strain showed a significantly higher concentration (473.88 ng/mL) at 4% sodium chloride (NaCl). Moreover, salt-stress condition, inoculation able increased shoot length (23.48%), weight (24%), root (2.47%), (44.82%) compared uninoculated control. Therefore, seedlings were inoculated examine potential promoting reprogramming after Inoculation isolates mitigated improved plant, enhanced chlorophyll contents, quantum efficiency fluorescence, total phenolic content, flavonoid diphenyl-1-picrylhydrazyl (DPPH) activity, antioxidant activities during research demonstrated application promising reducing helps better salt-stressed environment.