Plant growth promotion is bacteria and plant species-specific
To assess the changes in growth of Arabidopsis (model plant), Artemisia
(medicinal plant) and Broccoli (crop) induced by strains of three
specific rhizobacterial genera (Figure 1a ), we expressed fresh
root and shoot biomass as a percentage relative to the non-treated
control plants. Two-way ANOVA showed that the impact of the three
rhizobacterial strains on plant growth was dependent on the interacting
partners (Supplementary Material, Table S1 ). In the following
sections, we refer to these interactions as ‘effective partnerships’
when the rhizobacterial strain promotes growth whereas ‘ineffective
partnerships’ result in no growth promotion or reduced growth.