Rhizosphere indole-3-acetic acid as a mediator in the Sorghum bicolor–phenanthrene–Sinorhizobium meliloti interactions

Phytoremediation potential of Juncus subsecundus in soils contaminated with cadmium and polynuclear aromatic hydrocarbons (PAHs)

“…Plantgrowth-promoting rhizobacteria could accelerate phytoremediation of metalliferous soils (Ma et al, 2011). An IAA-dependent increase in the root-surface area led to improved sorghum (Sorghum bicolor) growth under phenanthrene stress (Golubev et al, 2011). Hence, the enhanced plant growth in the Cd-PAHs co-contaminated soils as observed in the study presented here is likely linked to increased abundance/activity of PAH degraders in rhizosphere, but further study is needed to confirm the plant-microbe interactions in the co-contaminated wetland soils.…”

Inoculation with Metal-Mobilizing Plant-Growth-Promoting RhizobacteriumBacillussp. SC2b and Its Role in Rhizoremediation

“…In this study, strain SC2b possessed multiple PGP traits such as production of IAA, production of siderophore, utilization of ACC, and solubilization of phosphate. Among the PGP traits, bacterial synthesis of IAA was found to help plants in production of longer roots for nutrient uptake under metal stress conditions (Golubev et al, 2011). Thus, the intent was to optimize production of IAA by supplementing Bacillus sp.…”

Capacity of Pseudomonas Strains to Degrade Hydrocarbons, Produce Auxins and Maintain Plant Growth under Normal Conditions and in the Presence of Petroleum Contaminants

“…Nevertheless, only a small number of publications have addressed the synthesis of hormones by plant growth promoting rhizobacteria (PGPR) under conditions of oil pollution and their phytoremedial effect on plants. For example, a model system consisting of bacteria (Sinorhizobium meliloti) capable of associative nitrogen fixation, hydrocarbon oxidation, and the production of auxins in combination with a grass (Sorghum bicolor) has been successfully used for the remediation of soils contaminated with polycyclic aromatic hydrocarbons [24]. Testing free living bacteria of Pseudomonas as hormone producers and plant growth promoters under conditions of contamination with petroleum is of no less interest than the study of associative bacteria, since the capacity for the active decomposition of hydrocarbons and resistance to adverse environmental conditions have been detected in many representatives of this genus [25][26][27].…”