Study the Effect of <i>Pseudomonas trivialis</i>, Isolated from Soils Subjected to High Anthropogenic Pressure, on Plant Resistance to Salt Stress

From soils exposed to anthropogenic load, a bacterial strain resistant to pollutants was isolated and characterized. The strain was identified as Pseudomonas trivialis 381 based on morphological, cultural, physiological and biochemical characteristics, as well as MALDI-TOF and 16S rRNA analysis. Its sequence was submitted to the NCBI GenBank (OR234684.1). Studies were conducted to evaluate the influence of the strain on seed germination and plant growth qualities. Laboratory studies have shown the stimulating effect of P. trvialis 381 on tomato seeds; seeds treated with the bacterial cultural liquid increased the energy of germination and seed germination to 100% (with the control being 64% and 60%), and also led to an increase in the length of the stem and root, and the number of roots. Microvegetation experiments have shown the stimulating effect of P. trivialis 381 on the growth of tomatoes and rice, with the particularly noticeable development of the root system, which enabled plants to absorb nutrients more quickly and made them more resistant to adverse conditions. The cultivation of seeds treated with cultural liquid on artificially saline soils (by adding 10% NaCl) enhanced the plants’ resistance to salinity, resulting in better growth of primed plants and an increase in chlorophyll content to more than 3 times in the leaves.

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