Growth-promoting pseudomonas spp. for plants of the solanaceae family

Pseudomonas spp. is a promising group of PGPRs with a combination of useful properties. This makes them also successful symbionts of different plant species. In this work, the influence of two strains of Pseudomonas sp. OBA 2.9 and Pseudomonas sp. OBA 2.4.1 on the growth of plants from the Solanaceae family (pepper, vegetable and berry physalis). The content of pigments in leaves was analyzed after preliminary inoculation of seedlings with bacteria and their cultivation in the soil for a month. Treatment with bacteria led to an increase in the dry biomass of the studied cultures inoculated with Pseudomonas sp. OBA 2.9 by 23-53%, while Pseudomonas sp. OBA 2.4.1 by 38-76% relative to control untreated plants. Treatment with Pseudomonas sp. OBA 2.4.1 had a greater effect on the content of pigments in leaves than Pseudomonas sp. OBA 2.9, resulting in an increase in the accumulation of chlorophyll a by almost 150%, chlorophyll b by 143% and carotenoids by 160% relative to untreated plants. Such data indicate a positive effect of this strain on the photosynthetic apparatus, which ultimately had a positive effect on the accumulation of dry biomass of the studied plants. This allows us to conclude that the Pseudomonas sp. OBA 2.4.1 to increase the biomass (yield) of these important crops.