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Two aerobic, halotolerant, facultatively methylotrophic strains M1K and M7 were isolated from the Suaeda prostrata Pall. and Plantago maritima L. rhizospheres from saline soils of the Solikamsk technogenic ecosystem. The isolates showed growth at 5–10% NaCl concentration. Based on 16S rRNA and mxaF gene sequence analysis, the obtained strains were classified as Methylophaga nitratireducenticrescens M1K and Paracoccus sp. M7. Within 5 days of the inoculation experiment, the wheat seedlings colonized with the isolated strains under 170 mM of NaCl showed an increase in growth parameters and synthesis of plant pigments over the control samples. The ability of analyzed cultures to influence indole-3-acetic acid (IAA) synthesis from L-tryptophan in the culture medium was found. The obtained data suggest the possibility of using isolated symbiotic bacterial strains for the creation of biofertilizer – plant growth promoter in the salt affected soils.
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