Figure 5

In vitro studies testing plant growth properties: indole-3-acetic acid (IAA), siderophores (Sid), organic acids (OA), and acetion (Acet) production, 1-aminocyclopropane-1-carboxylate (ACC)-deaminase activity, phosphate solubilization (P), atmospheric nitrogen fixation (N2) as well as cadmium (Cd), zinc (Zn), copper (Cu), and lead (Pb) tolerance of bacterial endophytes isolated from roots (R), rosette leaves (RL), stem leaves (SL), and rhizosphere (RS) of A. arenosa growing on Zn–Pb–Cd waste heaps (A) and the reference area (B).