Bacillus subtilis and Bacillus velezensis population dynamics and quantification of spores after inoculation on ornamental plants

We report that on all the plants studied (Echinacea purpurea ‘Salsa red’, Echinacea purpurea ‘Fatal attraction’, and Lavandula angustifolia ‘Hidecote blue’), spores rapidly germinated and colonized the rhizoplane, maintaining a relatively low proportion of spores in the population over time, whereas the bacterial population on the leaves rapidly d eclined. Bacteria in the surrounding soil did not germinate and persisted as spores. Taken together, these results suggest that only cells found at the rhizosphere remain metabolically active to allow the formation of a lasting relationship with the plant, making possible beneficial effects from the inoculated bacteria.
Source: Canadian Journal of Microbiology - Category: Microbiology Authors: Source Type: research