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. 2021 Jan 15;11:618415. doi: 10.3389/fmicb.2020.618415

FIGURE 5.

FIGURE 5

Scanning electron microscopy of maize seeds’ surfaces and roots colonization by B. velezensis strain CMRP 4490. The first column shows the seeds’ surfaces on all treatments on the first day (3,000×), the second column shows the seeds’ surfaces after 7 days, the third column shows roots amplifications after 7 days (2,000×). (a–c) Negative control without biological products. (d–f) Positive control treated with Presence® (200 g/100 kg of seeds). (g–i) Treatment with B. velezensis strain CMRP 4490 lyophilized (100 g/100 kg of seeds). (j–l) Treatment with B. velezensis strain CMRP 4490 lyophilized (200 g/100 kg of seeds). (m–o) Treatment with B. velezensis strain CMRP 4490 lyophilized (300 g/100 kg of seeds). All treatments with B. velezensis strain CMRP 4490 lyophilized (g,j,m) exhibited cells attached to seed surfaces and exhibited successfully maize root colonization (h,k,n). The B. velezensis strain CMRP 4490 concentration of viable spores per gram of lyophile was 1 × 1010 CFU/g.