Figure 3.

Proportions of plant growth-promoting rhizobacteria isolated from different cultivation sites of physic nut (CM1, CM2, NR1, and NR2) and sacha inchi (CR1 and CR2). The rhizobacteria included in these tests were randomly selected based on their colony features, accounting for 15% of all appeared bacterial colonies per site. Numerical data indicated in the bar graphs refer to the numbers of rhizobacterial isolates giving positive tests. Information about cultivation sites and host plants is available in Table 1.